35 Free Developer Tools That Run in Your Browser: JSON, APIs, JWT, Regex, Cron, Hashes & More
42 free browser-based developer tools — JSON formatter, JWT decoder, regex tester, API tester, UUID, hash, cron builder. No upload, no sign-up.
35 Free Developer Tools That Run in Your Browser: JSON, APIs, JWT, Regex, Cron, Hashes & More
Most of a developer's day is not spent writing features. It's spent on the small stuff in between: pasting an API response somewhere to make it readable, decoding a token to find out why auth is failing, checking whether a cron expression really means "every weekday at 9", generating fifty UUIDs to seed a test table, or diffing two config files that are supposed to be identical and clearly aren't. Each of those is a two-minute job — right up until you're pasting production data into a random site that wants you to sign in first. The developer tools on FWD Tools are forty-two free, browser-based utilities for exactly those jobs. They all run client-side: your JSON, your tokens, your API payloads, your passwords and your source code stay in the tab. No account, no rate limit, no paid tier, and nothing sitting in a log file on someone else's server after you close the page. Who these are for Backend and full-stack developers debugging live systems — formatting …
