Inspiration
Most popular online converters, image tools, and JSON formatters upload user files, images, and sensitive payloads to remote cloud servers. We built OneToolBox to provide a fast, 100% private alternative where user data never leaves the web browser.
What it does
OneToolBox is a free, high-performance suite of 25+ browser utilities including:
- Developer Tools: JSON Formatter & Viewer, UUID Generator, HTML Escaper, CSS/JS Minifiers, YAML Validator, SVG Optimizer, Hash Generator, Text Diff.
- Image Tools: 100% Canvas Image Compressor, WebP Converter, PNG/JPG Converters, Favicon Generator, Image Resizer.
- Calculators & Utilities: CSPRNG Password Generator, Age Calculator, Unix Timestamp Converter, Base64 Encoder/Decoder, QR Code Generator, 4K YouTube Thumbnail Downloader.
How we built it
Built using Vanilla HTML5, modern CSS tokens with dark mode, and native ES6 JavaScript. Image processing is powered by HTML5 Canvas API, while cryptography and random generation use the native browser Web Cryptography API (crypto.subtle & crypto.getRandomValues).
Try it out
Check out the live platform at https://onetoolbox.dev.
Built With
- canvas-api
- css3
- developer-tools
- html5
- javascript
- privacy
- web-crypto-api
