ToolsXpo

Regex Pattern Tester

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

Configuration

Find all matches

Ignore letter casing

^ and $ per line

. matches newlines

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground
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Master Regular Expressions with Real-Time Testing

Regular expressions are one of the most powerful tools in a developer's arsenal. 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.

About Regex Pattern Tester

Test regular expressions against sample text in real-time. Visualize matches, capture groups, and flags with instant feedback. It's built for string manipulation and text-processing tasks, runs instantly, and works on any device — no install, no sign-up.

How to use Regex Pattern Tester

  1. Paste or type your input into the editor on the left.
  2. Leave the defaults, or tweak them if the tool exposes options.
  3. The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
  4. Copy the output, or download it, and you're done.

Why use Regex Pattern Tester?

  • Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
  • Private by default — your input never leaves your device.
  • Accurate — the same, well-tested logic powers both this page and the public API.
  • Free — unlimited use in the browser, with an optional API for automation.

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.

Frequently asked questions

Is Regex Pattern Tester free to use? Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.

Is my data private? Yes. Regex Pattern Tester runs entirely in your browser — your input never leaves your device and nothing is logged or stored.

Can I automate Regex Pattern Tester? Yes — call the regex-tester API endpoint from any language and script it into your workflow.

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