Regex Tester Pro
Regex Tester Pro is a browser extension for writing, testing, and debugging regular expressions.
What Regex Tester Pro is
Regex Tester Pro is a browser extension for writing, testing, and debugging regular expressions. It highlights matches in real time, labels named and numbered capture groups, and previews Find and Replace results with backreferences such as $1 and $2. Supported flags include global, case-insensitive, multiline, dotall, unicode, and sticky. The extension generates code for JavaScript, Python, Java, PHP, Go, Ruby, C#, and Rust. Other tools include a plain-English pattern explainer, ReDoS safety analyzer, more than 40 examples, quick insertion, and multi-string testing. A context menu sends selected webpage text to the tester. The project says processing is local and offline, with no user data collected or transmitted. A free plan is available. Zovo Pro costs $4.99 a month; Zovo Lifetime costs 99.00 USD once. GitHub lists the repository as archived and read-only.
Good
- Real-time match highlighting
- Generates code for several programming languages
- Includes pattern explanations and ReDoS analysis
- Works offline with local processing
- Supports context-menu testing from webpages
Watch out
- GitHub repository is archived and read-only
- Pro features require a paid plan
- Chrome extension installation is required
Who it suits
It suits developers and learners who need browser-based regex checks, explanations, capture groups, replacement previews, or generated code. Offline local processing may suit users who prefer not to transmit patterns.
Verdict
Regex Tester Pro combines interactive testing, explanations, replacement previews, and code generation in a browser extension. The archived repository and paid Pro features are important considerations.
Plans and prices
From Regex Tester Pro's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Zovo Pro | $4.99 a month | Pro features across included extensions while subscription is active · Monthly; renews until cancelled |
| Zovo Lifetime | $99, paid once | Lifetime Pro access across included extensions · One payment; no subscription renewals |
The facts
Each one read from Regex Tester Pro's own pages, with the date it was checked.
What it does
- Additional tools
- Features include a plain-English pattern explainer, a ReDoS safety analyzer, 40+ examples, a quick-insert palette, and multi-string testing.checked 7 Oct 2026
- Availability
- The project links to the Chrome Web Store and gives manual installation steps for Chrome developer mode.checked 7 Oct 2026
- Capture groups
- It extracts named and numbered capture groups and displays them with labels.checked 7 Oct 2026
- Code export
- It generates regex code for JavaScript, Python, Java, PHP, Go, Ruby, C#, and Rust.checked 7 Oct 2026
- Flags
- It supports global, case-insensitive, multiline, dotall, unicode, and sticky regex flags.checked 7 Oct 2026
- Offline use
- The repository says the extension works completely offline and processes regex locally in the browser.checked 7 Oct 2026
- Privacy and permissions
- The repository states it collects or transmits no user data and lists storage, activeTab, and contextMenus as its permissions.checked 7 Oct 2026
- Pro features
- The repository lists unlimited AI-powered regex generation, multi-flavor support for Python, Go, Java, PCRE, and .NET engines, unlimited pattern history, and priority support as Pro features.checked 7 Oct 2026
- Project status
- GitHub says the repository was archived by its owner on March 14, 2026 and is read-only.checked 7 Oct 2026
- Purpose
- Regex Tester lets users test and debug regular expressions in the browser with real-time match highlighting and code export.checked 7 Oct 2026
- Replace preview
- Find and Replace provides a live preview and supports capture-group backreferences such as $1 and $2.checked 7 Oct 2026
- Support
- The project directs users to GitHub to report bugs or request features and says suggestions are read.checked 7 Oct 2026
Where it runs
- Browser integration
- A right-click context menu lets users select text on a webpage and test it with Regex Tester.checked 7 Oct 2026
The company
- Maker
- Zovo is described as a solo operation built and maintained by developer Michael Lip, who publishes under theluckystrike on GitHub.checked 7 Oct 2026
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