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8 browser-based developer tools. No signup, no install, nothing leaves your browser.
- Annotate: arrows, text, shapes, blur on screenshots
- JSON Formatter: auto-format via clipboard
- Diff Checker: side-by-side/unified
- Base64 / URL Encoder-Decoder
- Timestamp Converter
- JWT Decoder
- Chrome Extension: auto-detect formats
Everything runs locally. Privacy is the architecture.
PureMark8 free browser tools. No signup. Nothing leaves your browser
tommy_worklableft a comment
Hey everyone! I'm Tommy, a solo developer from Japan. I built PureMark because I was tired of pasting sensitive data — JWTs, API responses, Base64 strings — into random online tools without knowing where it goes. PureMark processes everything locally in your browser. Nothing is ever sent to a server. No accounts, no tracking, no friction. It started as a simple JSON formatter, and grew into a...
PureMark8 free browser tools. No signup. Nothing leaves your browser