I built a set of developer tools that run entirely in your browser

I kept pasting JWTs, JSON with real customer data, and config files into random online tools, and never knew where that data went. So I built DevTrove: https://dev-trove.com

What it is

22 free developer tools: JSON formatter and validator, JSON Schema validator, JSON semantic diff, YAML ↔ JSON, CSV ↔ JSON, JWT decoder and encoder/verifier, Base64, URL and HTML encoding, hash and password generators, a regex tester, a cron explainer, a timestamp converter, and more.

How it handles your data

• Your input is processed in your browser. Tools don't send it to a server, store it, or put it in the URL.
• No analytics, no ads, no sign-up.
• Heavy tools (regex, YAML, JSON diff and schema validation) run in a Web Worker with a timeout, so a catastrophic regex can't freeze the page.
• The JWT tools use the Web Crypto API, reject alg: none, and enforce minimum HMAC key lengths.

Stack

Next.js, React, TypeScript. Each tool has unit tests and Playwright end-to-end tests, including accessibility checks on desktop and mobile.

I'd love feedback

• Which tool do you reach for that's missing?
• Anything that feels slow, confusing, or broken on your device?

Thanks for reading!