Developer Tools

Developers lose an embarrassing amount of time to tiny, fiddly tasks: hand-writing a cron expression and hoping the fields are in the right order, testing a regex by deploying it and watching production logs, or squinting at a minified JSON blob trying to find the missing comma. These are five-minute problems that somehow eat forty-five minutes — mostly because the feedback loop is terrible. You write something, push it somewhere, wait, and then learn you were wrong. These free developer tools collapse that loop to milliseconds. The cron expression generator builds valid 5-field schedules from dropdowns and immediately shows you the plain-English meaning plus the next five run times, so a typo can never silently schedule your backup job for the wrong day. The online regex tester compiles your pattern with the real JavaScript engine as you type, highlights every match in your sample text, and explains invalid patterns in plain language instead of dumping a stack trace. And the JSON formatter takes any pasted payload and returns it pretty-printed, minified, or validated — with the exact line and column of any syntax error, plus key counts and nesting depth so you understand an unfamiliar API response at a glance. Everything runs entirely in your browser: no accounts, no uploads, no waiting, and your code and data never leave your machine. Bookmark the set and the next time a schedule, pattern, or payload misbehaves, you will have the answer before your coffee cools.

Developer tools for cron schedules, JSON, regex and everyday debugging

This hub collects the small utilities developers reach for mid-task: build a cron expression and preview its next runs, format and validate JSON against the real grammar, test a regex against your own sample text, decode a JWT before your API rejects it, or turn a Unix timestamp into a readable date without a round-trip to a server. The snippets, payloads and test strings you paste in never leave your machine — which is exactly why these tools run here.

Small utilities, used a hundred times a day

Developer tools earn their place by being instant and forgettable — no sign-up, no install, no upload. The UUID Generator produces bulk v1 and v4 UUIDs with per-line copy for seeding databases and test fixtures, and the URL Encoder handles the encode/decode round-trip for query strings and callback URLs without mangling reserved characters.

For debugging, the JWT Decoder shows a token’s header and payload in plain text (so you can check an expiry before your API does), the Base64 Encoder converts text and data both ways, and the JSON Formatter turns a minified wall of JSON into something a human can diff. Everything runs locally in your browser, which matters when the token or payload is a secret.