About DevToolBox
Free tools, no signup, no data sent to servers.
What is DevToolBox?
DevToolBox is a free collection of 51+ online tools for developers, writers, designers, and anyone who works with data. Every tool runs entirely in your browser — nothing is uploaded to any server.
Our Philosophy
- Free forever — all tools are free to use with no limits
- Privacy first — your data never leaves your browser
- No signup — use any tool instantly, no account required
- Fast — no server round-trips means instant results
Our Tools
We currently offer 51 tools across categories including:
- Developer tools (JSON formatter, Base64, hash generator, regex tester)
- Text tools (word counter, case converter, diff checker)
- Calculators (percentage, BMI, tip, age)
- Converters (unit converter, timestamp, CSV/JSON)
- Generators (password, QR code, UUID, lorem ipsum)
- Timers (stopwatch, countdown, Pomodoro)
- CSS tools (gradient generator, box shadow generator)
How We Stay Free
We display non-intrusive advertisements via Google AdSense. These ads keep the site running while keeping all tools free for everyone.
Contact
Have a suggestion for a new tool, found a bug, or just want to say hi? Visit our Contact page.