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Home / Tools / Regex Tester

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Developer tool

Regex Tester

Test regular expressions against text locally.

Processing details depend on the tool. Check its input and output notes before using it with sensitive material.

Use the toolNo account required

Pattern, flags, then test text

What this tool does

Test regular expressions against text locally.

How to use

Steps for this workflow

Enter or paste the value in the tool's input field.
Choose an operation or options when shown.
Run the tool, inspect the output, and copy or download it if available.

Input and output

Test regular expressions against text locally.

Common use cases

Cleaning up text before sharing
Formatting code or data for a document
Converting structured values into a more useful text form

Learn more

Relevant guides

How to convert text between common formats

Use text transformations to make a list, script, or data block easier to share, compare, or import.

How to use developer encoding and decoding tools

Use encoding and decoding tools to inspect tokens, payloads, and structured data without relying on guesswork.

How to work with Base64 encoding and decoding

Use Base64 when data must be represented as plain text, and decode it carefully when checking a payload or token.

Keep exploring

Related tools

Regex Replacer

Find and replace text with regular expressions locally.

JSON Formatter

Format, validate, minify and copy JSON locally.

Base64 Encoder

Encode or decode text in your browser.

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