Regex Tester

Test regular expressions with real-time match highlighting. Includes common regex presets.

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Zero Server Uploads

Your files are processed entirely inside your browser tab using WebAssembly & local JavaScript APIs.

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Presets & Templates
MATCHES
0
RATIO
0.0%
STATUS
ACTIVE
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No regex pattern matches identified.
Cheatsheet Reference

How to use this tool

1

Select a pre-built expression pattern template or enter your custom regex.

2

Toggle flags like global (g) or case-insensitive (i) using control badges.

3

Paste test string source inside the uploader container and check matches highlights.

4

View group captures details table or copy snippet exporter code blocks.

Key Features & Benefits

Real-time Highlighting

Instantly highlights matches as you type the expression and text.

Capture Groups Extraction

Lists all captured sub-groups for advanced query pattern debugging.

Replace Previews

Test matching replacements using standard string substitution panels.

Code Generator Snippets

Get drop-in regex code blocks for JavaScript, Python, Go, and PHP.

Frequently Asked Questions