âš¡ Developer Tools

Regex Tester

Test regular expressions live with match highlighting.

About the Regex Tester

Test regular expressions live with match highlighting. It runs entirely in your browser — nothing is uploaded to a server, so it is fast and private. Just use it and go.

How to use the Regex Tester

  1. Enter or paste your input into the tool above.
  2. Adjust any options to fit what you need.
  3. Copy or download the result.

Frequently asked questions

Is the Regex Tester free?

Yes. This tool is completely free to use, with no sign-up required.

Is my data safe?

Everything runs locally in your browser. Your input never leaves your device.

Related tools

File Permission Decoder

Decode permissions such as 644 or 755 into rwx notation.

Markdown to HTML Converter

Convert common Markdown formatting into HTML.

URL Parser

Break a URL into protocol, host, path, query parameters, and fragment.

JSON Formatter

Format, beautify, minify, and validate JSON with error highlighting.

JSON to XML Converter

Convert JSON data into structured XML markup.

Unix Timestamp Converter

Convert between Unix timestamps and human dates, with a live clock.