⌕
Home › Developer › Regex Tester

Regex Tester

Test JavaScript regular expressions against text.

Result—
Enter values above.
Regex syntax and features can differ between programming languages.

Related calculators

Continue with a related tool.

{}

JSON Formatter & Validator

Format, minify and validate JSON in your browser.

64

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to text.

%

URL Encoder / Decoder

Encode and decode URL components.

Content reviewed: 24 September 2026

About the Regex Tester

Test JavaScript regular expressions against text. Use the controls above to enter the values or text required by this specific tool, then review the result together with the method and limitations shown on the page.

Method

Uses the JavaScript RegExp engine.

Limitations

Regex syntax and features can differ between programming languages.

For information about calculation checks, browser-side processing and external services, see Methodology & Accuracy.