RegEx Tester

Spec sheet

Purpose

RegEx Tester is a free, open-source tool for testing regular expressions online.Read 8 Oct 2026 · github.com

Integrations

The opened official pages do not describe integrations.Read 8 Oct 2026 · github.com

Availability

The tool is available online at its GitHub Pages site.Read 8 Oct 2026 · regextester.github.io

Capture display

The interface includes a ShowCaptures option.Read 8 Oct 2026 · regextester.github.io

Notable limits

The live interface lists regex engine options but does not state pricing, usage quotas, or a trial.Read 8 Oct 2026 · regextester.github.io

Pattern and text inputs

The tester provides fields for a regular-expression pattern and test text.Read 8 Oct 2026 · regextester.github.io

Regex options

Available options include IgnoreCase, Multiline, ExplicitCapture, Compiled, Singleline, IgnorePatternWhitespace, RightToLeft, ECMAScript, CultureInvariant, and NonBacktracking.Read 8 Oct 2026 · regextester.github.io

Replace

The interface includes a Replace To input.Read 8 Oct 2026 · regextester.github.io

Replacement

The interface includes a Replace field and a To field.Read 8 Oct 2026 · regextester.github.io

Results

The interface has a Result area for the test output.Read 8 Oct 2026 · regextester.github.io

Security and compliance

The opened official pages do not state security or compliance claims.Read 8 Oct 2026 · github.com

Source code

The maker links to source code hosted under the RegExTester GitHub organization.Read 8 Oct 2026 · github.com

Support contact

The GitHub organization lists [email protected] as its contact email.Read 8 Oct 2026 · github.com

Usage noted by maker

The maker says the tool served 1.5k users with 2k test sessions in 2021.Read 8 Oct 2026 · github.com

Usage reported

The maker says the tool served 1.5k users with 2k test sessions in 2021.Read 8 Oct 2026 · github.com

Where Specifiction places it

• Regular Expression Testers#22 of 236.5