Encoding Tools
Encode and decode data instantly: Base64, URL, HTML entities, Hex, ROT, JWT and more—all in your browser for speed and privacy.
Blockchain Tools 2
ABI Encoder / Decoder
Encode function calls into calldata or decode raw transaction input data for Ethereum, Polygon, BSC and any EVM chain. Supports tuples, arrays, structs.
Solidity Function Selector
Generate Solidity function selectors and event Topic0 hashes from signatures. Encode 4-byte selectors, lookup common ERC20 and DeFi signatures.
Conversion 22
Number Conversion 22
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.
Data Tools 1
CSV Encoder
Fix CSV delimiters, encoding, quotes, and line breaks. Convert between comma, semicolon, tab, or pipe delimiters instantly.
Developer Tools 13
Encoding 12
Base32 Encoder/Decoder
Encode text to Base32 or decode it back instantly per RFC 4648. Optional padding, case-insensitive input. Ideal for 2FA secrets, QR codes and DNS.
Base58 Encoder/Decoder
Free online Base58 encoder and decoder tool. Encode text to Base58 or decode Base58 to text instantly. Uses Bitcoin alphabet without confusing characters (0, O, I, l). Perfect for developers working with cryptocurrencies, blockchain, Bitcoin addresses, and human-readable encoding.
Base64 Encoder/Decoder
Free online Base64 encoder and decoder tool. Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8, ASCII, URL-safe encoding and multiple character sets. Perfect for developers working with APIs, data encoding, and web development.
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
Free online HMAC generator and HMAC encrypt tool. Generate HMAC (Hash-based Message Authentication Code) with SHA-256, SHA-512, or SHA-1. Create secure message authentication codes for API security, JWT signing, and data integrity verification. Supports hex and base64 output formats.
HTML Entities Encoder/Decoder
Encode special characters to HTML entities or decode them back. Named (&), numeric (&) and hex (&) forms. Prevent XSS and display HTML safely.
Hex Encoder/Decoder
Convert text to hexadecimal or decode hex to text instantly. Supports plain, 0x prefix and space-separated formats. Ideal for debugging and binary data.
Image Base64 Encoder/Decoder
Encode images to Base64 data URLs or decode Base64 back to images. Supports PNG, JPG, GIF, WebP, BMP, SVG with HTML/CSS-ready output formats.
JWT Encoder/Decoder
Free online JWT (JSON Web Token) encoder and decoder tool. Create JWT tokens or decode and analyze existing tokens instantly. View header, payload, signature, and claims information. Supports HMAC algorithms (HS256, HS384, HS512). Perfect for developers working with authentication, OAuth, and API security.
Punycode Converter
Convert Unicode domain names (IDN) to ASCII Punycode and back, per RFC 3492. Supports all scripts: Latin diacritics, Chinese, Cyrillic, Arabic.
ROT Encoder/Decoder
Free online ROT encoder and decoder tool with support for ROT-0 to ROT-25. Encode and decode text using ROT-13 cipher (Caesar cipher). Simple letter substitution cipher for basic text obfuscation. Perfect for puzzles, CTF challenges, and learning cryptography basics.
URL Encoder/Decoder
Free online URL encoder and decoder tool. Encode text for URLs or decode URL-encoded strings instantly. Convert special characters, spaces, and Unicode to percent-encoded format. Perfect for web developers working with query parameters, API endpoints, and URL handling.
Utilities 1
JavaScript Obfuscator
Free online JavaScript obfuscator tool. Protect your JavaScript code by obfuscating and encrypting it. Make your JS code unreadable while maintaining functionality.
Text Tools 1
Text to Morse
Convert text to Morse code and vice versa. Encode messages to Morse, decode Morse to text, play audio signals, and learn Morse code with interactive reference chart.
