About Dev Tools Online

Dev Tools Online provides free, fast, browser-based utilities for developers and programmers. Our tools work entirely in your browser — no data is sent to any server, no account required, and no usage limits enforced.

We built these tools because we found ourselves copying data into sketchy online tools or installing desktop apps just to format JSON or decode a JWT. Every tool on this site is something we use ourselves in our daily development work.

What We Offer

From JSON formatting to regex testing, Base64 encoding to cron expression generation, our 10 tools cover the everyday tasks that slow developers down. All tools run client-side, which means your data stays on your machine — we never see it, never log it, and never store it.

Our Commitment

All tools are free to use, updated regularly, and optimized for both desktop and mobile use. We do not require registration, subscriptions, or email addresses. We are funded by non-intrusive advertising, which allows us to keep everything free.

Contact

Have a suggestion for a new tool or found a bug? Contact us here. We read every message and respond to most within 1-2 business days.