Side by side
Regex Tester Pro vs RegExr
Both stand on regular expression testers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Extension
Choose Regex Tester Pro for browser-based pattern debugging, replacement previews, and code generation, with offline use and a free plan. Look elsewhere if you need an actively maintained repository, or if the Pro features do not fit your plan or budget.
Visit Regex Tester Pro
Free plan Web
RegExr combines a browser-based editor with explanations, tests, and learning resources. Be aware that shared Community copies cannot later be changed or removed.
Visit RegExrThe facts
| Regex Tester Pro | RegExr | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Extension | Web |
| Lowest paid plan | Zovo Pro: $4.99 a month | Free or on request |
| Plans published | 2 | 1 |
| Maker | Not published | Not published |
| Website | github.com | regexr.com |
| On regular expression testers | #12 of 23 | #8 of 23 |
Regex Tester Pro: what it does well
- Highlights matches in real time and labels named and numbered capture groups.
- Previews replacements, including capture-group backreferences.
- Generates code for eight listed programming languages.
- Includes a pattern explainer, ReDoS analyzer, examples, and quick-insert palette.
- Works offline and processes patterns locally, according to the project.
What to know first
- The GitHub repository is archived and read-only.
- Unlimited AI generation, unlimited history, and priority support require Pro access.
RegExr: what it does well
- Results update as you type
- Explain describes expressions in plain English
- Tests mode checks expected and rejected matches
- Includes a cheatsheet and full reference
What to know first
- Community-shared copies cannot be edited or deleted
- Saved expressions use public share links
Alternatives to Regex Tester Pro Alternatives to RegExr The whole list