Viewer Tools

Preview and inspect files directly in your browser—images, PDFs, text and more—with reliable, fast viewers for instant file analysis and review.

28 tools available

Audio Tools 2

Audio Metadata Viewer

Free online audio metadata viewer. Read ID3 tags, album art, artist, title, bitrate, codec from MP3, FLAC, M4A, OGG, WAV and more. View all audio file information.

Waveform Viewer

Free audio waveform viewer with a real windowed STFT spectrogram, selectable FFT size and window, dBFS peak meters, stereo split and 100x zoom. No upload.

Blockchain Tools 1

Crypto Logo Library

Free library of 500+ cryptocurrency logos in transparent PNG. Search Bitcoin, Ethereum, Solana, SUI, top altcoins. Direct URL or download for devs.

Data Tools 5

JSON Tree Viewer

Explore JSON as a collapsible tree, run JSONPath queries, search keys/values, and see depth, size & key-count stats. Download filtered results. Free.

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 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 4

Testing & Debugging 1

HTTP Header Viewer

HTTP header viewer with a security header scorecard: get an A+ to F grade for HSTS, CSP, X-Frame-Options, CORS, plus your own request headers.

Utilities 3

Google Fonts Pair Finder

Find and preview Google Fonts pairings, then export production-ready code: CDN, GDPR-safe self-host @font-face, preload links, variable fonts.

Mermaid Editor

Free Mermaid live editor for UML, flowcharts, class & ER diagrams. No install, renders live, exports PNG/SVG with transparent background and 1x-4x scale.

Markdown cheatsheet

Searchable Markdown cheatsheet with live preview and copy-paste snippets for README files: headings, tables, task lists, links, code, callouts and math.

File Tools 3

File Hex Viewer

Open any file as a hex dump in your browser. View offsets, hex, ASCII. Auto-detect the file type from magic bytes and flag extension spoofing privately.

Hex File Compare

Diff two binary files byte by byte with side-by-side hex dump, offsets and ASCII. Get per-file SHA-256 and CRC32 checksums. 100% browser-side. Verify downloads.

Metadata Viewer

Inspect any file's metadata and verify its SHA-256: real MIME by magic bytes, size, EXIF + GPS, ID3 audio, video codecs, PDF info — in-browser, no upload.

Fun Tools 3

Fake Death Screen

Generate realistic fake Blue Screen of Death (BSOD) for Windows, macOS and Linux. Fully customizable progress and timing. Great for pranks and screenshots.

Fake Update Screen

Create realistic fake update screens for Windows, Mac, Android, and more. Fullscreen prank screens with customizable progress, time, and text.

Hacker Typer Screen

Hacker typer prank screen: mash any keys and watch realistic code stream like you're a movie hacker. Multiple themes, fullscreen, no install.

Geography & Mapping Tools 2

GeoJSON Viewer

Free GeoJSON viewer: validate RFC 7946 structure and visualize points, lines and polygons on an interactive map with a WGS84 bounding box readout.

GPX Viewer

Free online GPX viewer: load a GPX file, see tracks on a map, read an interactive elevation profile, distance, duration and total elevation gain instantly.

Hardware Tools 2

Connectivity 1

USB Device Viewer

Inspect USB devices in your browser via WebUSB: view vendor & product IDs, manufacturer, USB version, configurations, interfaces and endpoint details.

Sensors 1

GPS Location Viewer

Track your position with navigator.geolocation in real time. View a Leaflet-based offline map, monitor speed, altitude, accuracy, and heading directly in your browser.

Image Tools 1

Image Info

Check photo metadata online, no upload: EXIF, GPS, camera settings, dimensions, megapixels, aspect ratio and print size at 300 DPI. Strip EXIF too.

PDF Tools 2

PDF Metadata Viewer

View PDF metadata and properties online. Free PDF info viewer showing title, author, dates, version and more. Fast, secure, works in browser.

PDF Viewer

Free PDF viewer in your browser: real PDF.js canvas with page navigation, zoom, fit-width, rotate, print, plus a page-size readout (A4/Letter). No upload.

Text Tools 1

Character Counter

Real-time character, word, line, paragraph and sentence counter. Plus chars-no-spaces, LLM tokens, SEO title/meta, Twitter and SMS length checks.

Time Tools 1

World Clock

See current time in any city worldwide, side by side. Compare 5+ timezones at once, view UTC offsets, schedule across DST. Free, no signup, mobile-friendly.

Video Tools 1

Video Metadata Viewer

Inspect MP4, MOV, MKV, WebM video metadata: codec, resolution, FPS, bitrate, duration, GOP, color space, audio tracks. Drag a file, no upload, fully private.