Our Mission
DevTools was created with a simple goal: to provide developers with fast, reliable, and privacy-respecting tools for everyday tasks. Whether you are debugging an API response, generating unique identifiers for a database migration, or validating a configuration file, these tools are designed to get the job done without friction.
We believe that developer tools should be free, fast, and transparent. Every tool on this site runs entirely in your browser — no data is ever transmitted to a server, no account is required, and everything works offline after the initial page load.
Available Tools
JSON Formatter & Validator
A full-featured JSON formatting, validation, and exploration tool. Key features include:
- Real-time validation — Errors detected as you type, with precise line and column indicators
- Interactive tree view — Explore deeply nested JSON structures with expandable nodes
- Data statistics — Size, depth, key count, and type breakdown at a glance
- Multiple input methods — Paste, drag-and-drop, file upload, or load from URL
- Full RFC 8259 / ECMA-404 compliance via browser-native
JSON.parse()
UUID Generator
Generate universally unique identifiers in three versions, with bulk generation and educational guides:
- Three versions — UUID v1 (time-based), v4 (random), and v7 (time-ordered)
- Format flexibility — Uppercase/lowercase, with or without hyphens
- Bulk generation — Up to 10,000 UUIDs at once with copy and download
- Cryptographically secure — Uses
crypto.getRandomValues(), notMath.random() - Full RFC 9562 compliance with correct version and variant bits
What Makes These Tools Different
- Complete privacy — All processing happens client-side. No backend, no database, no tracking of your input. Your data never leaves your device.
- No dependencies — Built with vanilla HTML, CSS, and JavaScript. No frameworks, no build steps, no npm packages. The entire site loads in milliseconds.
- Offline capable — After the initial page load, every tool works without an internet connection.
- Standards compliant — JSON formatting follows RFC 8259, UUID generation follows RFC 9562. We implement specifications precisely, not approximately.
Technical Details
DevTools is a static website consisting of HTML, CSS, and JavaScript files. It is hosted on Cloudflare Pages, a global CDN that ensures fast load times from anywhere in the world. There is no server-side processing — every feature runs in your browser.
The source code is intentionally simple and auditable — you can view it in your browser's developer tools at any time.
Contact
DevTools is a free, open tool maintained by independent developers. If you have feedback, feature requests, or bug reports, please reach out through the channels available on the site.