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Regexo

Free#21 of 23 in Regular Expression Testers

Regexo: A focused, open-source desktop tester for Java regular expressions. Ranked #21 of 23 in Regular Expression Testers by our editors (6.1/10); pricing: Open source; best for java developers wanting a lightweight desktop tool.

6.1/10Editor score

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Regexo6.1 Visit Regexo

At a glance

Editor score
6.1 / 10
Pricing
Open source
Best for
Java developers wanting a lightweight desktop tool
Paid from
Free
Regex flavors
Java
Facts checked
21 Sep 2026

Where it wins
- Tests Java regular expressions and highlights matched results
- Supports replacing text that matches a regular expression
- Saves, loads, modifies, and manages expressions in a database
Where it doesn't
- Supports only Java regular expressions
- Does not provide explanations, debugging, or code generation
- Beta software with a listed last update of September 29, 2016

Our verdict on Regexo

Regexo is an open-source Java Swing desktop application for developers who need to develop and test regular expressions. It uses Java’s regular-expression language, highlights matched results, supports text replacement, and provides tools for saving, loading, modifying, and managing expressions in a database. Windows, macOS, and Linux are supported, making it a practical fit for Java developers who prefer a downloadable desktop utility rather than a browser-based tester.

Its strongest feature set centers on a straightforward Java-regex workflow. Users can enter an expression, inspect highlighted matches, replace matching text, and preserve expressions as database records for later use. The platform-independent project documentation identifies Windows, Linux, and Mac operating systems, while the published category specifications identify Java as the supported regex flavor and saved patterns as a core capability. This focused scope makes Regexo suitable for quick pattern development and repeat access to saved expressions.

Regexo is less suitable when the work requires guidance or broader regex coverage. It does not include explanations, debugging, or code generation, and its support for Java’s regular-expression language does not extend to multiple regex engines. The project is marked beta, and its listed last update was September 29, 2016. Choose Regexo if you want an open-source desktop tool centered on Java patterns, matching, replacement, and saved expressions. Choose an alternative if you need multi-engine testing, instructional feedback, debugging assistance, or generated code.

Your product? Our editors can test Regexo in depth and publish a review, labelled as paid · from $149/mo →

Regexo pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on sourceforge.net

Regexo fact sheet

Free plan	Not verified
Paid from	Free
Regex flavors	Java
Pattern explanation	Not verified
Step-through debugger	Not verified
Code generation	Not verified
Saved patterns	Yes
Available platforms	Desktop
Deployment	Desktop
Platforms	Windows, macOS, Linux
Support	Docs
Built for	Solo, Small business (editorial estimate)
Pricing	Open source
Website	sourceforge.net
Facts checked	21 Sep 2026

Alternatives to Regexo

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Featured on iTechGuides

Regexo is listed in our Regular Expression Testers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update