Regex Pattern Tester

Test regular expressions against sample text in real-time. Visualize matches, capture groups, and flags with instant feedback.

Configuration

Pattern

Global (g)

Find all matches

Case-Insensitive (i)

Ignore letter casing

Multiline (m)

^ and $ per line

Dotall (s)

. matches newlines

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground

New here? Create a free account and call this tool from your code in minutes.

Input

0 chars0 lines

Output

0 chars0 lines

How to use Regex Pattern TesterEvery option explained, a worked example, and what to check when the output looks wrong.Read the guide

Master Regular Expressions with Real-Time Testing

Regular expressions are one of the most useful tools a developer has. Our Regex Tester lets you write, test, and debug patterns instantly against any text input — all processed locally in your browser with zero server calls.

Supported Flags

Global (g): Find all matches instead of stopping at the first.
Case-Insensitive (i): Match regardless of upper/lowercase.
Multiline (m): Treat each line as a separate string for ^ and $.
Dotall (s): Allow the dot character to match newlines.

How to use Regex Pattern Tester

Paste or type your input into the editor on the left.
Leave the defaults, or tweak them if the tool exposes options.
The result appears on the right as you type.
Copy the output or download it.

This tool runs in your browser. Your input is not uploaded or stored.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call Regex Pattern Tester from your own code, a script or a CI pipeline.


Bash
curl "https://api.toolsxpo.com/v1/regex-tester" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.