Validation, encoding, timestamps and UUIDs - the small things you reach for between compilation cycles.
Tools for engineers who would rather not context-switch into yet another tab to validate a JWT or generate a UUID. Everything runs in your browser, your payloads never leave the machine, and the pages load fast enough that you can leave them open in a sidebar while you debug.
Each card below is a page in its own right - it walks through what the tool does for Web and API developers, why you would reach for it over the alternatives, and answers the questions that come up most often. Click through to use the tool, or read the page first to decide which one fits.
No. Every tool on this page runs entirely in your browser. The HTML, JavaScript and any parsing logic are static files served from the edge; your input never leaves your machine. You can verify this by opening DevTools and watching the Network tab.
No - they are a complement, not a replacement. Most engineers use these for one-off cases (a malformed JWT, an oddly-encoded URL string) where reaching for a CLI helper feels like overkill, then go back to their usual workflow.
Yes - each tool preserves your last input locally in your browser so the next visit is one click away. There is no account and no sync; clearing your browser data wipes the state.