Developer helpers
Regex tester, Unix timestamp converter, and Markdown preview — private browser utilities for everyday engineering.
Beyond format converters, day-to-day engineering needs a fast regex check, an epoch ↔ date conversion, and a Markdown draft preview — without uploading secrets to a third-party playground.
This hub groups those client-side helpers so you can move between pattern debugging, timestamp conversion, and Markdown preview in one privacy-first workflow.
Why these tools
- Regex uses JavaScript RegExp semantics in your browser
- Timestamps detect seconds vs milliseconds by magnitude
- Markdown preview escapes raw HTML for safer drafts
- Markdown Preview
Preview Markdown as HTML in your browser — private drafts, no upload.
- Regex Tester
Test JavaScript regular expressions against sample text — matches and groups, private in your browser.
- Timestamp Converter
Convert Unix timestamps to dates and back — seconds, milliseconds, and ISO strings in your browser.