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Regex Tester

Evaluate regular expressions against target text. View match captures and groupings.

Developer Tools Suite
JSON FormatterBase64 Encoder/DecoderURL Encoder/DecoderJWT DecoderUUID GeneratorHash GeneratorRegex TesterHTML FormatterCSS MinifierJavaScript Beautifier

Workspace Inputs

Result / Output

Sponsored

What is Regex Tester?

Regular Expressions (Regex) represent search patterns of characters designed for string matching.

Evaluate regular expressions locally with group outputs.

How to use the Regex Tester

  1. 1Enter regex pattern (e.g. [a-z]+).
  2. 2Type flags (e.g. g, i).
  3. 3Input target text.
  4. 4Read matched arrays below.

Benefits & Key Features

  • Javascript regex parsing.
  • Highlights flags.
  • Groups inspection.

Frequently Asked Questions

Supports standard Javascript flags: g (global), i (case insensitive), m (multiline), and u (unicode).

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Case Converter

Convert text case to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and slugify-case.

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JSON Formatter

Format, beautify, and validate JSON data. Compact/minify JSON code. Instant validation.

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Base64 Encoder/Decoder

Encode plain text to Base64 format or decode Base64 strings back to text.

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URL Encoder/Decoder

Encode strings to URL-safe percent encoding or decode percent-encoded URLs back.

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