Free, client-side web tools. No install, no server, no tracking.
Each one is a single HTML file — just open and use.
Markdown viewer & editor with live preview, math, Mermaid diagrams, PDF export, and shareable links.
JSON formatter, validator, tree viewer, diff, and transform toolkit with TypeScript generation.
CSV viewer, editor, and analyzer with sorting, filtering, SQL queries, and charts.
Regex pattern tester with live highlighting, group matching, replace mode, explain, and pattern library.
Text comparison tool with side-by-side and unified views, word-level highlighting, and patch export.
SQLite in the browser. Import CSV/JSON, write queries, view results, and export — all client-side.
SHA-256/512, MD5, HMAC, Base64, URL encode — hash text or files with Web Crypto API.
Cron expression builder with human-readable descriptions, next run times, and visual timeline.
Timezone converter, Unix timestamp tool, world clock, duration calculator, and date formatter.
Programmer's calculator with DEC/HEX/OCT/BIN display, bitwise ops, bit visualization, and unit converter.
Drawing & photo editor with brushes, shapes, filters, layers, crop, and export to PNG/JPG/WebP.
Color picker, palette generator, WCAG contrast checker, gradient builder, and color blindness simulator.
SVG viewer, optimizer, and converter with live preview, syntax highlighting, and PNG/JPG export.
QR code generator, camera scanner, and steganography — hide QR codes inside images.
Hide encrypted messages inside images using steganography. AES-256 encryption, adjustable LSB depth.
Font previewer with waterfall view, character grid, compare mode, and @font-face CSS generator.
Audio recorder, editor, and generator with waveform display, trim, effects, spectrogram, and WAV export.
PDF viewer, merger, splitter, and page reorder tool — all processing happens in the browser.
Mobile-first document scanner with edge detection, perspective correction, enhancement, OCR, and PDF export.
Israeli license plate reader — snap a photo or type a number, get vehicle details from data.gov.il.
Infinite canvas whiteboard with shapes, sticky notes, and real-time collaboration via WebRTC.
Share your live location with friends on a map. Peer-to-peer, no server, no tracking — just open and share.
Private AI chatbot running entirely in the browser. WebGPU-powered, conversations never leave your device.
Offline text translation between 9+ languages. AI models run locally, no data sent to servers.