README.md

GoodWebTools — 193 Free, Privacy-First Web Tools That Run in Your Browser

Compress images, edit PDFs, remove backgrounds, decode JWTs, scan QR codes, and 180+ more — with nothing ever uploaded. Every tool runs 100% client-side with WebAssembly, Canvas, and on-device AI, so your files never leave your device.

🚀 Open goodwebtools.com · 🖥️ Desktop app · 🤖 Ask Agent

Desktop	Mobile	Mobile category menu

⭐ If GoodWebTools is useful, star the repo — it helps other people find privacy-first tools.

Why GoodWebTools?

Most "online tools" quietly upload your files to a server. GoodWebTools does all the work in your browser — with WebAssembly, Canvas, the File System Access API, and on-device machine-learning models — so:

• 🔒 Nothing is uploaded. Your images, PDFs, videos, and text stay on your device.
• ⚡ No sign-up, no limits, no watermarks. Just open a tool and use it.
• 📶 Works offline. It's an installable PWA — cache it once, use it on a plane.
• 🖥️ Native desktop app (Windows / macOS / Linux) built with Tauri, for tools that want the filesystem.
• 🤖 Built-in AI agent that drives the tools for you — fully on-device, or with your own API key.

Tools

193 tools across 13 categories. Here's a taste — browse them all at goodwebtools.com.

Category	Preview	Popular tools
🖼️ Image (30)		Background Remover · Image Compressor · Image Converter · HEIC to JPG · Favicon Generator
📄 PDF (20)		Merge PDF · Organize PDF · Fill & Sign PDF · Extract Images · Add Page Numbers
🎬 Media (21)		Video Compressor · Subtitle Editor · Voice Recorder · White Noise
🎨 Draw (3)		DB Diagram (DBML) · Whiteboard · Signature Pad
💻 Dev (57)	—	JSON Formatter · Base64 · JWT Decoder · URL Encode/Decode · UUID Generator
📇 Documents (13)	—	PPTX Viewer · PPTX to PDF · EML Email Viewer · GEDCOM Viewer
🧮 Calculators (17)	—	Percentage Calculator · Time Zone Converter · Countdown Timer · Roman Numerals
🗂️ Files (6)	—	Compress to Size · File Encrypt/Decrypt · Zip / Unzip · Archive Extractor
🔬 Testers (7)	—	Device Test · Microphone Test · Webcam Test · Keyboard Test
🗺️ Maps (4)	—	Coordinate Converter · Map Explorer · GeoJSON/GPX/KML Viewer · Static Map Maker
🌐 Network (3)	—	P2P File Transfer · Video Call · Optical File Transfer
🎮 Games (7)	—	Wheel Spinner · 2048 · Block Puzzle · Dino Run
🧪 Playground (4)	—	Code Scratchpad · SQLite Playground · Online Notepad · Quick To-Do

🤖 Ask Agent — the tools, driven for you

Tell it what you want in plain language — "compress this image to 100 KB", "merge these PDFs", "remove duplicate rows from this CSV and convert to Excel" — and it picks the right tools, chains them, and hands back the result. It runs a small model fully on-device (WebGPU), or you can plug in your own OpenAI-compatible / Anthropic API key. Either way, the processing stays in your browser.

Tech

• Astro static site + React islands (each tool is its own lazy-loaded chunk)
• 100% client-side processing: WebAssembly, Canvas, onnxruntime-web, @imgly/background-removal, mupdf, ffmpeg.wasm, transformers.js / WebGPU
• Installable PWA with offline support
• Native desktop app via Tauri 2
• Deployed on Cloudflare Workers (static assets + R2 for on-demand ML models)

Run locally

npm install --legacy-peer-deps
npm run dev            # http://localhost:4321

Build a production bundle with npm run build, run tests with npx vitest run.

Contributing

PRs are very welcome — new tools, fixes, and translations. Every tool is a thin React island (src/islands/<category>/) over a pure, unit-tested library (src/tools/<category>/*.lib.ts), registered in src/registry/tools.ts. The golden rule: keep everything client-side — if a feature would need a server, it doesn't fit GoodWebTools.

1. Fork & branch (feat/<your-tool>)
2. Add your *.lib.ts (with tests) + a thin island, register it in tools.ts, add SEO copy in tool-seo.ts
3. npx vitest run && npm run lint && npm run build
4. Open a PR

See CONTRIBUTING.md and DEPLOYMENT.md for the full workflow and self-hosting guide.

License

MIT — free to use, self-host, and build on.