Converter Tools

Convert files, media and units instantly—images, audio, video, documents and more. Accurate, fast, and privacy-friendly.

224 tools available

AI Tools 4

AI Depth Estimator

Create depth maps from 2D images using MiDaS AI model. Estimate distance and depth information from any photo. Free online monocular depth estimation tool.

AI Speech to Text

Free AI-powered speech to text converter. Transcribe audio and video files to text with timestamps. 100% private, browser-based using OpenAI Whisper.

AI Style Transfer

Transform your photos into artwork using AI neural style transfer. Apply famous painting styles like Van Gogh, Monet, Picasso to any image. Free online tool.

AI translator

Free private AI translator running NLLB-200 in your browser. Translate 15+ languages with WebGPU acceleration. No upload, no API key, no limits.

Audio Tools 10

Note Frequency

Instrument tuner reference: convert notes to Hz with cents deviation, MIDI numbers, overtone/harmonic series, interactive piano. A=432/440/415 presets.

Audio Converter

Convert audio between MP3, WAV, OGG, AAC, FLAC and OPUS in your browser. Bitrate, sample-rate and mono/stereo control, all local, no upload required.

Audio Normalizer

Normalize audio loudness to LUFS (EBU R128) with true-peak dBTP ceiling: Spotify -14, Apple -16, broadcast -23. Plus channels, bitrate, samplerate.

Audio Reverser

Reverse audio online and export real MP3 (320/192/128 kbps) or WAV. Create reverse reverb, backmasking and sound design effects privately in your browser.

Audio Splitter

Split MP3 & WAV by time, parts, size or custom timestamps. 100% private in-browser processing, no upload, sample-accurate lossless WAV output.

Audio Volume Booster

Boost audio up to 300% with a true-peak limiter (no clipping) or normalize to exact LUFS for Spotify, YouTube, Apple and broadcast. In-browser, private.

Audio to MIDI

Browser-based audio to MIDI converter using YIN pitch detection. No upload, piano-roll preview, quantize to grid, DAW-ready .mid export for vocals & solos.

Channel Mixer

Free online channel mixer and vocal remover. Make karaoke tracks, downmix stereo to mono, swap L/R, isolate vocals, convert mono to stereo. MP3, WAV, OGG.

Speed & Pitch

Transpose any track ±12 semitones plus cents and time-stretch 0.5×–2.0× independently. Pure pitch shift keeps duration; source sample rate preserved.

Stereo Mono Converter

Stereo to mono downmix converter, 100% in-browser via FFmpeg.wasm. Pick the downmix law (0.5 or -3 dB L+R sum), check phase correlation and peak. FLAC, Opus.

Blockchain Tools 6

Blockchain Timestamp Converter

Convert Unix timestamps to human dates and vice versa for Ethereum, Bitcoin, Solana and EVM chains. Solidity-friendly, smart contract debugging.

Checksum Address Converter

Convert Ethereum addresses to EIP-55 checksum format. Validate and format ETH, BSC, Polygon addresses with mixed-case checksums for error detection.

APR to APY Converter

Convert APR to APY (and back) with daily, monthly, quarterly or continuous compounding. Compare effective yields for DeFi staking, savings accounts and lending.

Bitcoin Unit Converter

Convert Bitcoin units instantly: BTC, satoshi, mBTC, bits and more. Free online converter with fiat currency support and precise calculations.

Ethereum Unit Converter

Convert between Wei, Gwei, Ether, Szabo, Finney and all EVM units precisely. Calculate gas costs from transaction parameters. Free dev tool, instant.

Mnemonic to Address

Derive wallet addresses from BIP39 mnemonic for Bitcoin, Ethereum, Solana, XRP, TRON, Dogecoin, Cardano and more. 100% client-side, secure.

Calculators 8

Engineering Calculators 1

Scale converter

Free scale converter for drawings, models and maps. Convert metric, imperial (1:48) and ISO 5455 engineering scales, plus check A1/A3 paper fit.

Financial Calculators 1

Import Duty Calculator

Estimate import duty, VAT and landed cost by HS code, Incoterm (CIF/FOB) and destination. Free Section 321 de minimis checker with broker checklist.

Health & Fitness 2

Coffee Brew

Calculate coffee-to-water ratio for V60, AeroPress, Chemex, French press, espresso, Moka pot, cold brew. Pour schedule, grind, temp, plus SCA Golden Cup TDS.

Running Pace

Calculate running pace, time or distance for 5K, 10K, half, marathon. Negative-split pacing plan, splits table, Riegel predictor, min/km to mph converter.

HVAC Calculators 2

U-value & R-value Converter

Convert U-value (thermal transmittance) and R-value, build multi-layer wall assemblies, add air films, and check IECC climate-zone code compliance.

Dew Point & RH Calculator

Convert temperature, RH & dew point via Magnus-Tetens. Get wet bulb, humidity ratio, absolute humidity & vapor pressure for HVAC condensation, ASHRAE comfort.

Math Calculators 1

Aspect Ratio Calculator

Free aspect ratio calculator. Resize images and videos by ratio, then fit into any frame with exact letterbox bars and an FFmpeg scale+pad command.

Wire Calculators 1

SWG to mm converter

Convert SWG (Standard Wire Gauge) to millimeters instantly. Calculate diameter and cross-sectional area with the British wire gauge converter.

Color Tools 3

Color Converter

Convert HEX, RGB, HSL and CMYK colors with live preview, plus a built-in WCAG 2.1 contrast checker for accessible AA/AAA text and color-blindness-aware design.

Color Temperature

Convert Kelvin (1000K–40000K) to HEX, RGB, HSL and mired, with a CTO/CTB gel calculator for white balance, video LED 5600K and tungsten 3200K work.

Dark Mode Pair Generator

Paste a light-mode HEX palette and get the matching dark-mode colors via OKLCH lightness inversion. WCAG contrast checks and CSS variables export.

Conversion 106

Area Conversion 5

All Area Units

Convert all area units instantly. Square meters, feet, acres, hectares, km², mi², mm², cm², yd² and ping in one tool. Free online converter with formulas.

acre to ping

Convert acres to ping (坪) instantly. 1 acre = 1224.17 ping using the Taiwan/Japan land unit (1 ping ≈ 3.306 m²). Free acre→ping calculator for real-estate use.

ha to ping

Convert hectares to ping (坪) instantly. 1 ha = 3024.99 ping using the Taiwan/Japan unit. Free ha→坪 calculator for metric-to-East-Asia land area conversion.

ping to acre

Convert ping (坪) to acres instantly. 1 ping = 0.000817 acre (1224.17 ping = 1 acre). Free 坪→acre calculator for Taiwan/Japan land deals in US/UK measure.

ping to ha

Convert ping (坪) to hectares instantly. 1 ping = 0.0003306 ha (3025 ping = 1 ha). Free 坪→ha calculator for converting East Asian land units to metric hectares.

Electric Charge Conversion 1

All Charge Units

Convert electric charge units instantly. Coulombs, milliCoulombs, microCoulombs, nanoCoulombs, picoCoulombs, Amp-hours, milliamp-hours.

Color Conversion 8

cmyk to rgb

Convert CMYK color values to RGB instantly with live color preview. Free online CMYK to RGB converter tool for web design, printing and digital graphics.

hex to rgb

Convert hexadecimal color codes to RGB values instantly with live color preview. Free Hex to RGB converter tool for CSS, web design and digital graphics.

hsl to rgb

Convert HSL color values to RGB instantly with live color preview. Free online HSL to RGB converter tool for CSS, web design and digital graphics projects.

hsv to rgb

Convert HSV color values to RGB instantly with live color preview. Free online HSV to RGB converter tool for design, Photoshop and digital graphics projects.

rgb to cmyk

Convert RGB color values to CMYK instantly with live color preview. Free online RGB to CMYK converter tool for print design.

rgb to hex

Convert RGB color values to hexadecimal color codes instantly with live color preview. Free online RGB to Hex converter tool.

rgb to hsl

Convert RGB color values to HSL instantly with live color preview. Free online RGB to HSL converter tool for CSS, web design and digital graphics projects.

rgb to hsv

Convert RGB color values to HSV instantly with live color preview. Free online RGB to HSV converter tool for Photoshop, design and digital graphics projects.

Data Rate Conversion 1

All Data Rate Units

Convert all data rate units instantly. Bits per second, kilobits, megabits, gigabits, bytes per second, KB/s, MB/s, GB/s in one tool.

Data Storage Conversion 5

All Data Storage Units

Convert all data storage units instantly. Bytes, KB, MB, GB, TB, PB, bits, Kbit, Mbit, Gbit in one tool. Free online converter with formulas and table.

GB to B

Convert gigabytes to bytes instantly: 1 GB = 1,073,741,824 B (binary) or 1,000,000,000 B (decimal). Free GB→B calculator with correct GiB vs GB SI handling.

KB to B

Convert kilobytes to bytes instantly: 1 KB = 1024 B (binary) or 1000 B (decimal). Free KB→B calculator with precise IEC vs SI handling for storage and networking.

MB to B

Convert megabytes to bytes instantly: 1 MB = 1,048,576 B (binary) or 1,000,000 B (decimal). Free MB→B calculator with correct MiB vs MB handling for files and networks.

TB to B

Convert terabytes to bytes instantly: 1 TB = 1,099,511,627,776 B (binary) or 1,000,000,000,000 B (decimal). Free TB→B calculator with correct TiB vs TB SI handling.

Energy Conversion 7

All Energy Units

Convert all energy units instantly. Joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, electronvolts in one tool.

BTU to J

Convert BTU to Joules (BTU to J) instantly with our free online converter. Accurate 1 BTU = 1055.06 J formula, examples, conversion table and step-by-step...

BTU to kJ

Convert BTU to Kilojoules (BTU to kJ) instantly with our free online converter. Accurate 1 BTU = 1.05506 kJ formula, examples, conversion table and...

Joules to BTU

Convert Joules to BTU (J to BTU) instantly with our free online converter. Accurate 1 J = 0.000947817 BTU formula, examples, conversion table and...

Joules to cal

Convert Joules to Calories (J to cal) instantly with our free online converter. Accurate 1 J = 0.239006 cal formula, examples, conversion table and...

cal to J

Convert Calories to Joules (cal to J) instantly with our free online converter. Accurate 1 cal = 4.184 J formula, examples, conversion table and...

kJ to BTU

Convert Kilojoules to BTU (kJ to BTU) instantly with our free online converter. Accurate 1 kJ = 0.947817 BTU formula, examples, conversion table and...

Flow Rate Conversion 1

All Flow Rate Units

Convert all flow rate units instantly. Liters per second, minute, hour, cubic meters, gallons per minute, cubic feet in one tool.

Frequency Conversion 4

All Frequency Units

Convert all frequency units instantly. Hertz, kilohertz, megahertz, gigahertz, and revolutions per minute in one tool. Free converter with formulas.

Hz to MHz

Convert hertz to megahertz (Hz to MHz) with SI-exact 10^-6 factor. Free converter for RF, broadcasting, and CPU clocks with BIPM-precision arithmetic.

MHz to Hz

Convert megahertz to hertz (MHz to Hz) using exact SI factor 10^6. RF, SDR and DSP-grade converter with formulas, tips and atomic-clock-traceable precision.

kHz to Hz

Convert kilohertz to hertz (kHz to Hz) with SI-exact 10^3 factor. Free audio, radio and RF converter with BIPM-compliant precision and edge-case handling.

Fuel Consumption Conversion 5

All Fuel Consumption Units

Convert fuel consumption units instantly. Kilometers per liter, liters per 100km, miles per gallon US and UK in one tool.

L/100km to L/100mi

Convert litres per 100 km to litres per 100 miles instantly. 1 L/100km = 1.609344 L/100mi because 100 miles is 160.9344 km — the linear km-to-mile ratio.

L/100km to MPG (US)

Convert litres per 100 km to US miles per gallon instantly. MPG = 235.215 / L100km — the inverse relationship between metric and US fuel-economy units.

MPG (UK) to MPG (US)

Convert miles per gallon UK to miles per gallon US instantly. 1 MPG UK = 0.83267 MPG US because the imperial gallon is larger than the US gallon (4.546 vs 3.785 L).

MPG (US) to MPG (UK)

Convert miles per gallon US to miles per gallon UK instantly. 1 MPG US = 1.20095 MPG UK because the imperial gallon is 20% larger than the US gallon (4.546 vs 3.785 L).

Length Conversion 11

All Length Units

Convert all length units instantly. Meters, feet, inches, centimeters, kilometers, miles, yards, millimeters in one tool.

feet to inches

Convert Feet to Inches (ft to in) instantly with our free online converter. Accurate 1 ft = 12 in formula, examples, conversion table and step-by-step...

feet to km

Convert Feet to Kilometers (ft to km) instantly with our free online converter. Accurate 1 ft = 0.0003048 km formula, examples, conversion table and...

feet to meters

Convert Feet to Meters (ft to m) instantly with our free online converter. Accurate 1 ft = 0.3048 m formula, examples, conversion table and step-by-step...

feet to miles

Convert Feet to Miles (ft to mi) instantly with our free online converter. Accurate 1 mi = 5280 ft formula, examples, conversion table and step-by-step...

feet to yards

Convert Feet to Yards (ft to yd) instantly with our free online converter. Accurate 1 yd = 3 ft formula, examples, conversion table and step-by-step...

feet+inches to feet

Convert feet and inches (e.g. 5'10") to decimal feet using exact 1 ft = 12 in. CAD-grade converter with rounding rules, construction tips, and worked examples.

inches to meters

Convert inches to meters (in to m) with NIST-exact 1 in = 0.0254 m factor. Imperial-to-SI converter with BigNumber precision, formulas and conversion table.

inches to mm

Convert inches to millimeters (in to mm) with NIST-exact factor 25.4. Engineering-precision converter with formulas, tolerance tips and conversion table.

km to feet

Convert Kilometers to Feet (km to ft) instantly with our free online converter. Accurate 1 km = 3280.84 ft formula, examples, conversion table and...

yards to inches

Convert yards to inches (yd to in) with exact NIST-defined 1 yd = 36 in. Free converter with formulas, edge cases, and engineering-precision results.

Number Conversion 29

Roman Numerals

Free Roman numeral converter. Convert decimal numbers (1–3999) to Roman numerals and back. Validates canonical form, shows the step-by-step breakdown, and explains every symbol.

ASCII Hex Binary Dec Converter

Convert between ASCII text, hexadecimal, binary, decimal, and Base64 encoding. Free online number system converter with delimiter and prefix options.

ASCII to Binary

Convert text to binary strings using various character encodings. Free online ASCII to binary converter with file support and customizable delimiters.

ASCII to Hex

Convert text to hexadecimal strings using various character encodings. Free online ASCII to hex converter with file support and customizable delimiters.

Base Converter

Convert numbers between different number bases (2-36). Free online base converter supporting binary, octal, decimal, hexadecimal and any base up to 36.

Binary Converter

Convert binary numbers to decimal, hexadecimal, octal, and ASCII text. Free online binary converter with instant results.

Binary to ASCII Converter

Convert binary strings to ASCII, UTF-8, and other character encodings. Free online binary to text converter with file support.

Binary to Decimal

Convert binary numbers (base-2) to decimal numbers (base-10) instantly. Free online binary to decimal converter with step-by-step conversion process.

Binary to Hex

Convert binary numbers to hexadecimal and decimal. Free online binary to hex converter with step-by-step calculations and digit grouping support.

Binary to Octal

Convert binary numbers (base-2) to octal numbers (base-8) instantly. Free online binary to octal converter with step-by-step conversion process.

Binary to String

Convert binary strings to text using various character encodings. Free online binary to string converter with file support and multiple encoding options.

Decimal to Binary

Convert decimal numbers (base-10) to binary numbers (base-2) instantly. Free online decimal to binary converter with conversion steps.

Decimal to Hex

Convert decimal numbers to hexadecimal with step-by-step calculation. Simple and accurate decimal to hex conversion tool.

Decimal to Octal

Convert decimal numbers to octal and hexadecimal with step-by-step calculation. Simple and accurate decimal to octal conversion tool.

Decimal to Percent

Convert decimal numbers to percentage with step-by-step calculation. Simple and accurate decimal to percent conversion tool.

Hex Dec Bin Converter

Convert between hexadecimal, decimal, binary, and octal numbers instantly. Interactive bit toggle interface with support for signed numbers and different bit widths.

Hex to ASCII

Convert hexadecimal strings to ASCII text with multiple character encodings (UTF-8, Latin-1 and more). File upload supported. Free, no signup needed.

Hex to Binary

Convert hexadecimal numbers to binary numbers instantly. Free online hex to binary converter with step-by-step conversion process and digit grouping.

Hex to Decimal

Convert hexadecimal numbers to decimal with step-by-step calculation. Supports signed and unsigned decimal conversion with binary representation.

Hex to Octal

Convert hexadecimal numbers to octal with step-by-step calculation. Supports both octal and decimal output with detailed conversion steps.

Octal to Binary

Convert octal numbers to binary with step-by-step calculation. Simple and accurate octal to binary conversion tool. Free converter with formulas.

Octal to Decimal

Convert octal numbers to decimal with step-by-step calculation. Simple and accurate octal to decimal conversion tool. Free converter with formulas.

Octal to Hex

Convert octal numbers to hexadecimal with step-by-step calculation. Simple and accurate octal to hex conversion tool. Free converter with formulas.

PPB to PPM

Convert PPB to PPM (ppb to ppm) instantly with our free online converter. Accurate ppm = ppb ÷ 1000 formula, examples, conversion table and step-by-step...

PPM to PPB

Convert PPM to PPB (ppm to ppb) instantly with our free online converter. Accurate ppb = ppm × 1000 formula, examples, conversion table and step-by-step...

PPM to PPT

Convert PPM to PPT (ppm to ppt) instantly with our free online converter. Accurate ppt = ppm × 1,000,000 formula, examples, conversion table and...

PPM to Percent

Convert PPM to Percent (ppm to %) instantly with our free online converter. Accurate % = ppm ÷ 10000 formula, examples, conversion table and step-by-step...

PPT to PPM

Convert PPT to PPM (ppt to ppm) instantly with our free online converter. Accurate ppm = ppt ÷ 1,000,000 formula, examples, conversion table and...

Percent to PPM

Convert Percent to PPM (% to ppm) instantly with our free online converter. Accurate ppm = % × 10000 formula, examples, conversion table and step-by-step...

Power Conversion 6

All Power Units

Convert all power units instantly. Watts, kilowatts, megawatts, horsepower, BTU per hour, foot-pounds per second in one tool.

btu/hr to watts

Convert BTU per hour to watts instantly: 1 BTU/hr = 0.29307107 W. Free BTU/hr to W calculator for HVAC sizing, AC capacity and heating load specs.

dBm to Watts

Convert dBm to watts using the logarithmic formula P(W) = 10^((dBm-30)/10). RF / microwave converter with link-budget tips, ITU-R and IEEE references.

hp to kW

Convert horsepower to kilowatts using mechanical hp (745.6999 W). Auto, marine and industrial converter with PS / SAE / DIN definitions and worked examples.

kw to mw

Convert Kilowatts to Megawatts (kW to MW) instantly with our free online converter. Accurate 1 MW = 1000 kW formula, examples, conversion table and...

watts to btu/hr

Convert watts to BTU per hour instantly: 1 W = 3.41214 BTU/hr. Free W to BTU/hr calculator for HVAC sizing, heat-pump rating and US-spec equipment matching.

Pressure Conversion 2

All Pressure Units

Convert all pressure units instantly. Pascal, bar, psi, atmosphere, mmHg, torr, kilopascal in one tool. Free converter with formulas.

mmHg to Torr

Convert millimetres of mercury to torr. 1 mmHg = 1 Torr by historical definition (both ≈ 133.322 Pa). Free mmHg→Torr calculator for vacuum, medical and meteorology use.

Speed Conversion 1

All Speed Units

Convert all speed units instantly. Kilometers per hour, miles per hour, meters per second, knots, feet per second in one tool.

Temperature Conversion 11

All Temperature Units

Convert all temperature units instantly. Celsius, Fahrenheit, Kelvin conversions with formulas in one tool. Free converter with formulas.

celsius to kelvin

Convert Celsius to Kelvin (°C to K) instantly with our free online converter. Accurate K = °C + 273.15 formula, examples, conversion table and step-by-step...

celsius to rankine

Convert Celsius to Rankine (°C to °R) instantly with our free online converter. Accurate °R = (°C + 273.15) × 9/5 formula, examples, conversion table and...

fahrenheit to kelvin

Convert Fahrenheit to Kelvin instantly: K = (°F − 32) × 5/9 + 273.15. Free °F to K calculator with absolute-zero awareness and decimal precision.

fahrenheit to rankine

Convert Fahrenheit to Rankine instantly: °R = °F + 459.67. Free °F to °R calculator using the Rankine absolute scale common in US engineering thermodynamics.

kelvin to celsius

Convert Kelvin to Celsius (K to °C) instantly with our free online converter. Accurate °C = K − 273.15 formula, examples, conversion table and step-by-step...

kelvin to fahrenheit

Convert Kelvin to Fahrenheit instantly: °F = (K − 273.15) × 9/5 + 32. Free K to °F calculator with absolute-zero awareness, decimal precision, no signup.

kelvin to rankine

Convert Kelvin to Rankine (K to °R) instantly with our free online converter. Accurate °R = K × 9/5 formula, examples, conversion table and step-by-step...

rankine to celsius

Convert Rankine to Celsius (°R to °C) instantly with our free online converter. Accurate °C = (°R − 491.67) × 5/9 formula, examples, conversion table and...

rankine to fahrenheit

Convert Rankine to Fahrenheit instantly: °F = °R − 459.67. Free °R to °F calculator for US engineering thermodynamics and HVAC computations.

rankine to kelvin

Convert Rankine to Kelvin (°R to K) instantly with our free online converter. Accurate K = °R × 5/9 formula, examples, conversion table and step-by-step...

Voltage Conversion 1

All Voltage Units

Convert all voltage units instantly. Volts, millivolts, microvolts, kilovolts, megavolts in one tool. Free online converter with formulas and conversion table.

Volume Conversion 5

All Volume Units

Convert all volume units instantly. Liters, gallons, milliliters, cubic meters, quarts, pints, cups in one tool. Free converter with formulas.

cup to pt

Convert cups to pints instantly: 2 US cups = 1 US pint (16 fl oz). Free cup→pt calculator for recipes, brewing, bartending and bulk cooking conversions.

pt to cup

Convert pints to cups instantly: 1 US pint = 2 US cups (16 fl oz). Free pt→cup calculator for recipes, baking, brewing and bartending. Works for US measure.

qt to cup

Convert quarts to cups instantly: 1 US quart = 4 US cups (32 fl oz). Free qt→cup calculator for recipes, batch cooking, brewing and US kitchen volume.

qt to pt

Convert quarts to pints instantly: 1 US quart = 2 US pints (32 fl oz). Free qt→pt calculator for recipes, brewing, gardening and US kitchen volume measures.

Weight Conversion 3

All Weight Units

Convert all weight units instantly. Kilograms, pounds, ounces, grams, tons, stones, milligrams in one tool. Free converter with formulas.

grams to milligrams

Convert grams to milligrams instantly: mg = g × 1000. Free g to mg calculator for medication dosing, nutrition labels, lab work and cooking with decimal precision.

milligrams to grams

Convert milligrams to grams instantly: g = mg / 1000. Free mg to g calculator for medication dosing, nutrition labels, lab work and recipes with decimal precision.

Data Tools 16

Data Converter Hub

Convert CSV, JSON, XML, YAML, Excel and SQL INSERT statements both ways. Fast, private, offline conversion in your browser - nothing is uploaded.

YAML-JSON Converter

Convert YAML to JSON and back, including multi-document Kubernetes manifests. Upload files or paste data; all processing stays in your browser.

Data Merger

Merge, combine and concatenate multiple CSV or JSON files in your browser. Private client-side tool with union/intersect joins and duplicate removal.

CSV-SQL Converter

Convert CSV to SQL INSERT and CREATE TABLE or SQL back to CSV in your browser. Pick MySQL, Postgres, SQLite or SQL Server dialect with batch multi-row inserts.

XML-JSON Converter

Convert XML to JSON and JSON to XML online, in your browser, no upload. Keeps attributes, CDATA, leading zeros and nested structures intact.

CSV to Excel

Open CSV in Excel without uploading. Auto-detect comma, semicolon or tab delimiters, keep UTF-8 and leading zeros as text, and export clean .xlsx offline.

Excel to CSV

Convert Excel (.xlsx, .xls) to CSV in your browser, no upload. Choose sheet, delimiter, UTF-8 BOM and RFC 4180 CRLF/LF line endings for clean imports.

JSON to CSV

Convert JSON to CSV online free. Flatten nested JSON, pick any delimiter, add a UTF-8 BOM for Excel, and download a spreadsheet-ready CSV in your browser.

CSV to JSON

Convert CSV or TSV to JSON in your browser: array of objects, array of arrays, or NDJSON, with type inference, custom delimiters and nested dot-notation keys.

CSV Cleaner

Clean CSV & JSON online: deduplicate, fix UTF-8 encoding, remove blank rows, profile column quality. 100% browser-based, no upload, private.

CSV Encoder

Fix CSV/TSV delimiters, add UTF-8 BOM for Excel, normalize quotes and line breaks, and validate column counts against RFC 4180 before import.

CSV Filter & Query

Filter, search and query CSV or JSON in your browser—stack multiple AND/OR conditions, run SQL with GROUP BY, sort and export. No upload, fully private.

CSV Splitter

Split large CSV or TSV files by rows or size to fit Excel's 1,048,576-row limit. Header preserved, random sampling, 100% local in-browser, free.

CSV Viewer & Editor

View, edit and clean CSV files in your browser: remove blank and duplicate rows, fix delimiters, export to CSV or JSON. No upload, fully offline and private.

Excel Viewer

Preview Excel spreadsheets (.xlsx, .xls) in your browser. Switch sheets, copy to clipboard, export CSV. SheetJS-powered, files never leave your device.

Parquet Viewer

Browser-native Apache Parquet viewer. Opens SNAPPY, GZIP and ZSTD-compressed files, previews columnar data, exports to CSV/JSON. Files stay on device.

Developer Tools 16

Encoding 13

Base32 Encoder/Decoder

Encode or decode Base32 online per RFC 4648, with Base32hex and Crockford variants. Strict validation. Ideal for TOTP secrets, ULIDs and DNS.

Base58 Encoder/Decoder

Free online Base58 encoder/decoder. Decode Base58 strings, IPFS CIDs and raw bytes to hex or UTF-8 text, and encode text or hex (Bitcoin alphabet).

Base64 Encoder/Decoder

Free Base64 encoder & decoder. Encode text or files, generate data: URIs, decode Base64URL/JWT, UTF-8 & MIME line wrapping. Fast, private, browser-based.

Base85 Encoder/Decoder

Encode text or binary to Base85 (Ascii85) and decode back instantly. 25% more compact than Base64, perfect for PDF, PostScript and Git pack files.

HMAC Generator

Generate and verify HMAC signatures (SHA256/SHA512/SHA1/MD5). Compare webhook signatures, sign AWS requests and JWT HS256. Hex or Base64, 100% browser.

HTML Entities Encoder/Decoder

Escape HTML or decode entities online. Named, numeric & hex forms, code-point inspector, OWASP context-aware escaping — a free htmlspecialchars equivalent.

Hex Encoder/Decoder

Text ⇄ hex converter — plain, 0x-prefixed, space-separated, upper/lowercase. Auto-detects on decode, handles UTF-8. For debugging, memory dumps, colors.

Image Base64 Encoder/Decoder

Encode images to Base64 data URIs that preserve the original format and MIME with no quality loss, or decode Base64 to PNG/JPG. Client-side, no upload.

JWT Encoder/Decoder

Decode JWTs and verify HMAC signatures (HS256/384/512) in-browser. Inspect header, payload, claims, and validate exp, nbf, and iat. Build and sign tokens too.

Morse Code Translator

Translate text to International Morse code and back with audio at adjustable WPM, tone Hz and Farnsworth timing. Letters, numbers, punctuation, @ and prosigns.

Punycode Converter

Convert Unicode domains (IDN) to ASCII Punycode and back per RFC 3492. IDNA2008 / UTS-46 NFC normalization, xn-- ACE label, mixed-script warning.

ROT Encoder/Decoder

Free online ROT encoder and decoder with ROT13, ROT5, ROT18, ROT47, and Caesar shifts ROT-0 to ROT-25. Brute-force every rotation in one click to crack unknown-shift ciphers for CTF and puzzles.

URL Encoder/Decoder

Free URL encoder/decoder with encodeURIComponent vs encodeURI and RFC 3986 strict mode for OAuth and AWS SigV4 canonical requests. Decode preserves literal +.

Utilities 3

HTML to JSX

Free online HTML to JSX converter for React. Renames class→className, for→htmlFor, builds style objects, self-closes void elements, outputs typed .tsx.

JSON to TypeScript

Free online JSON to TypeScript converter. Paste any JSON, get strict interfaces with nested objects, arrays, and string-literal unions. Private, in-browser.

cURL to Code

Convert curl to fetch, Python, PHP, Node, Java, C# and more. Paste a Chrome DevTools 'Copy as cURL' and redact API keys in one click. Client-side.

File Tools 3

File Compressor

Compress files privately in your browser with GZIP, ZIP or DEFLATE. No upload needed. Ideal for logs, CSV, JSON and SQL dumps. Lossless, fast and free.

File Splitter

Split files by size or count, extract PDF page ranges, and verify each part with SHA-256 checksums. Private, offline browser processing, no upload.

Zip Files

Create ZIP archives in your browser with AES-256 password protection, folder structure preservation and ZIP64 large-file support. 100% private, no upload.

Geography & Mapping Tools 10

Reverse Geocoder

Free reverse geocoder: convert decimal or DMS GPS coordinates (lat/long) to street addresses via OpenStreetMap/Nominatim, with ISO 3166 region context.

Address Geocoder

Free address geocoder: convert any address to GPS coordinates (latitude/longitude). Get precise location data from street addresses, places, and landmarks instantly.

WKT GeoJSON Converter

Free WKT GeoJSON converter: convert WKT, EWKT and PostGIS output to/from GeoJSON FeatureCollection in WGS84. Validate and visualize geometries online.

Geohash Encoder Decoder

Geohash encoder/decoder for Redis GEO, MongoDB and PostGIS: lat long to geohash and back, auto-pick precision for a radius, copy covering prefixes as SQL WHERE.

Plus Codes

Free open-source Plus Codes tool: encode/decode Open Location Codes, recover short & compound codes, see true cell size in meters. No street address needed.

UTM / MGRS Converter

Free WGS84 UTM MGRS converter: lat long to UTM, MGRS at 1 m precision and 6/8/10-digit NATO grid reference. Batch CSV conversion for surveyors.

Distance & Bearing

Great-circle distance, forward/back bearing, midpoint and destination point between GPS coordinates. Results in km, miles and nautical miles. WGS84 ready.

Coordinate Converter

Free WGS84 GPS coordinate converter: instantly switch DD, DMS, DDM, UTM and MGRS. Bulk paste, use my location, export CSV, KML, GPX and GeoJSON.

CSV to GeoJSON

Free online CSV to GeoJSON converter (RFC 7946, WGS84/EPSG:4326). Map lat/lon columns, trim coordinate precision, preview on Leaflet. Private, browser-side.

KML/GPX Converter

Free KML to GeoJSON, GPX to GeoJSON & GeoJSON to KML converter. Convert GPS tracks, preview on a map, and get distance and elevation stats instantly.

Image Tools 11

Batch Image Processor

Process multiple images at once. Bulk resize, compress, convert formats, and hit exact KB size limits. 100% private - runs in your browser, no upload.

AVIF to PNG/JPG

Convert AVIF (AV1 image) to PNG or JPG in your browser. Keeps PNG transparency, adjustable JPG quality, optional resize. Zero upload, fully private.

Convert Image Format

Convert images to JPG, PNG, or WebP with quality and matte background control. 100% in your browser, no upload, files stay private. Fast and free.

HEIC to JPG

Batch convert iPhone HEIC/HEIF photos to JPG, PNG, or WebP offline in your browser. Private, no upload, Live Photo support, download all as ZIP.

Image to ASCII Art

Free image to ASCII art converter. Turn any photo into colored text art, export ANSI for terminals or PNG/TXT. Runs in your browser, no upload.

Image to Sketch

Free photo to pencil sketch converter. Realistic pencil shading plus charcoal, pen and line-art styles. Browser-based, no upload, instant download.

Image to Text

Free in-browser OCR: extract text from images privately (no upload), with a confidence score and one-click paragraph cleanup. 15+ languages, no signup.

PNG to SVG

Vectorize PNG/JPG/BMP to scalable SVG. Tunable threshold and noise filter, color or B&W tracing, path/node/size diagnostics. Browser-local, free, no signup.

Photo to Anime

Turn photos into anime art with AnimeGANv3 AI: Ghibli, Shinkai and JP Face styles. Runs locally, no upload, keeps your aspect ratio.

SVG to PNG

Convert SVG to PNG, JPEG or WebP up to 4096px with transparent background, @2x/@3x scaling and one-click multi-size icon-set export — all in your browser.

WebP to PNG/JPG

Convert WebP to PNG or JPG in your browser — preserves alpha when saving PNG, adjustable JPG quality, no uploads. Works offline after first load.

PDF Tools 13

Excel to PDF

Convert Excel (XLSX/XLS/CSV) to PDF free, 100% in-browser. Set page size, orientation, font, margins. Export one sheet or the entire workbook.

HTML to PDF

Convert HTML to PDF free, right in your browser. Turn invoices, resumes, reports or any HTML code into clean multi-page PDFs. No upload, A4/Letter presets.

Image to PDF

Combine multiple images into one PDF in your browser. Reorder pages, pick A4/Letter, set DPI and quality. JPG, PNG, WebP to PDF. Private, no upload, offline.

Linearize PDF

Optimize, compress and check PDF for Fast Web View in your browser. Object-stream compression, remove metadata, audit linearization. Private, no upload.

Markdown to PDF

Convert README & docs Markdown to PDF: GFM tables, code blocks, auto table of contents, page numbers, A4/Letter/Legal. Selectable text, 100% offline, no upload.

OCR PDF

Convert scanned PDFs to searchable text in your browser. No upload, 100% private. Batch page ranges, confidence scores, 15+ language OCR. Free.

PDF to HTML

Convert PDF to HTML in your browser, no upload. Pick page ranges, extract text or full-page images, and get one self-contained HTML5 file. Private & free.

PDF to Image

Convert PDF to images online. Export each PDF page as JPG or PNG. Free PDF to image converter with quality control. Fast, secure, works in browser.

PDF to Markdown

Convert PDF to Markdown free in your browser. Built-in OCR for scanned PDFs in 10 languages, auto heading/list detection, YAML front matter, live preview.

PDF to Text

Extract text from PDF in your browser, no upload. Preserves line breaks with smart layout mode, supports page-range extraction. 100% private PDF to TXT.

PDF to Word

Free PDF to Word converter that runs in your browser with no upload, keeping files private. Extract editable text to DOCX with A4 or US Letter page size.

Resize PDF

Resize PDF pages to A4, Letter, A3 or custom mm/in/pt sizes. Add print margins, scale or fit content, batch page ranges. Free, in-browser, no upload.

Word to PDF

Convert Word DOCX to PDF in your browser. Custom page size, orientation, margins. Preserves text, headings, images, tables. No upload, fully private.

Text Tools 6

Bionic Reading Converter

Free bionic reading converter for focus and accessibility. Bold word heads, dim the rest, tune the ratio, and copy HTML or rich text to Notion, Docs, Gmail.

Case Converter

Convert text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, UPPERCASE, lowercase, Title Case or Sentence case — instantly in your browser.

Markdown to HTML

Convert Markdown to HTML online with live preview, in-browser (no upload). GitHub Flavored Markdown, heading anchors, table of contents, export to file.

Remove Diacritics

Strip accents from Vietnamese, French, Spanish, Portuguese text. Output plain ASCII, a URL slug, or a filesystem-safe filename. Runs in your browser.

Text Splitter

Split text by tokens (for ChatGPT/Claude/LLM prompts), delimiter, character/word/line count, sentence, or paragraph. Number chunks, trim, copy — runs in your browser.

Text to Morse

Free online Morse code translator and encoder/decoder. Convert text to Morse, play CW audio with adjustable WPM and Farnsworth timing for ham radio practice.

Time Tools 5

Lunar Calendar

Convert solar to lunar dates both ways. Shows zodiac, stem-branch, leap month, 24 solar terms, Chinese New Year date. Chinese & Vietnamese, 1900-2100.

Epoch Converter

Convert Unix timestamps to human-readable dates and back, in UTC or any IANA timezone with DST. Batch mode, auto-detect seconds/ms/us/ns. Free for developers.

ISO Date Converter

Convert ISO 8601 to Unix epoch, RFC 3339, SQL DATETIME, week date and ordinal date with 4 simultaneous timezones, relative time, and Excel/Julian serials.

Meeting Time Planner

Free meeting scheduler across time zones with per-person working hours, meeting duration and .ics export. Find the best slot for every remote team member.

Timezone Converter

Convert time between any two timezones instantly, with DST handling, weekend flags and a business-hours overlap strip for meetings. Free, no signup.