Utilities
Regex testing, timestamp conversion, and other essentials. · 4 live · Free · No signup
Regex Tester
Test and debug regular expressions online with live match highlighting. View capture groups and match count in real time. Free online regex tester, no signup required.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, UTC and local time. Free epoch converter online, no signup.
Markdown Preview
Live Markdown preview with GitHub Flavored Markdown. See rendered output side-by-side as you type. Supports tables, code blocks, and task lists. Free, runs in browser.
JSON to TypeScript
Convert JSON to TypeScript interfaces instantly. Detects nested objects, arrays, and generates types. Runs entirely in browser. Free, no signup required.
Frequently Asked Questions
Which regex flavour is used?
JavaScript's built-in RegExp engine, which follows the ECMAScript specification. Most patterns are compatible with other languages with minor adjustments.
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970 00:00:00 UTC. It's the standard way to represent time in most programming systems.
Which Markdown features are supported?
GitHub Flavored Markdown: headings, bold, italic, inline code, fenced code blocks, tables, task lists, blockquotes, and horizontal rules.
Is my content sent to a server?
No. All rendering happens entirely in your browser using the marked library. Nothing leaves your device.
Does it send my JSON to a server?
No. All parsing and conversion happens directly in your browser. Your data never leaves your device.