Debuggex vs RegEx Visualizer & Explainer
Debuggex
debuggex.comRegEx Visualizer & Explainer
toolsviewer.comSide by side
| Figure | Debuggex | RegEx Visualizer & Explainer |
|---|---|---|
| Price from | $5/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 4 | 1 |
| Spec score · Regular Expression Testers | 9.1 (#2) | 7.1 (#17) |
| Integrations | The site offers an embed option for StackOverflow and lists Google Analytics and Mozilla Persona in its privacy policy. | The product page describes browser-based testing and copying the pattern with its flags; it does not list third-party integrations. |
| Live matching | Matches and non-matches update in real time while the expression and test text are edited. | It highlights regex matches as you type and displays match and capture group details. |
| Privacy | The privacy policy says Debuggex does not sell collected user data to third parties without express permission and stores only the account email, not the password. | Regex testing runs in the browser, and the page says content stays on the user's device unless they copy or download a file. |
Plans
In their own words
Debuggex
Debuggex is an online visual regex tester for JavaScript, Python, and PCRE. It offers visual and text modes, a step-through debugger, and pattern explanations for examining expressions. Users can add unit tests to check matches and subgroups as a regex changes, and browse a repository of pre-built expressions that includes tests. The service generates code snippets, saves patterns, and creates links that reopen expressions; expressions can also be embedded in StackOverflow answers. The Free plan costs nothing and includes two saved unit tests per regex and ten public expressions. Basic costs $5 a month, while Pro costs $15 a month. Enterprise has no listed price and includes options such as private server deployment, denial-of-service prevention, flexible user counts, an OEM license, and on-site training. The free tier excludes snippets based on expressions from the library. The privacy policy says saved or shared expressions can be viewed by anyone with the link, and previous versions are stored after updates. Debuggex is available on the web.
RegEx Visualizer & Explainer
RegEx Visualizer & Explainer is a browser tool for testing and debugging regular expressions. As a pattern is entered, it highlights matches and shows match and capture-group details. The tool explains individual tokens and provides a step-by-step debugger. Test mode checks pattern matches, Replace mode previews substitutions, and Diff mode compares two patterns. Test cases, presets, a cheatsheet, and browser history are also included. Matching uses the browser’s JavaScript RegExp engine and supports its regex flags. Testing runs in the browser; the page says content stays on the user’s device unless they copy or download a file. The tool runs on the web without installation or an account, and the Free plan costs nothing. It does not provide a multi-language code export panel, so patterns should be retested for differences in a target language. ToolsViewer describes its collection as intended for developers, students, designers, and other professionals. Support requests can be sent by email, with replies targeted within a few business days.