What is RegExr?
A tool for exploring and testing regular expressions with instant feedback as you type, supporting JavaScript and PCRE regex flavors, with access to a community library of patterns.
RegExr pricing
We don't have RegExr's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What RegExr does
The capabilities that matter for regex tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Redos resistant
- -
- Lookaround support
- -
- Backreferences
- -
- Unicode property escapes
- -
- Named captures
- -
- Multi pattern matching
- -
- Interface type
- Web
- Visualization
- ✓
- Code generation
- -
Platform & deployment
Independently observed- Web
- Cloud / SaaS
- Self-hosted
RegExr FAQ
Common questions about RegExr, answered from independent, dated evidence.
What is RegExr?
A web-based regex editor with real-time pattern matching feedback, supporting both JavaScript and PCRE flavors. Includes educational references, testing suites, community pattern sharing, and analysis tools for expressions and replacements. It is indexed under Regex Tools.
Source: https://regexr.com/
Is RegExr free to use?
RegExr is open source, so it can be self-hosted and used at no licence cost. It is released under the GPL-3.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://regexr.com/
What platforms does RegExr support?
We have confirmed browser-based access to RegExr. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.
Source: https://regexr.com/
Can RegExr be self-hosted?
Yes. RegExr can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://regexr.com/
Is RegExr open source?
Yes. RegExr is published under the GPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.
RegExr alternatives
Other regex tools we track, ranked by the same independent score.
- regex (Python module)Python regex engine extending the standard re module with additional featureslow · 43%
- PCRE2Pattern matching library with Perl 5 compatible syntaxlow · 29%
- HyperscanA high-performance C library for efficiently matching multiple regular expressions at oncelow · 31%
- RE2A fast and safe regular expression library that prevents performance catastropheslow · 35%
- OnigurumaA C library for regular expression pattern matchinglow · 30%
- RegexBuddyA desktop tool for learning, creating, debugging, and managing regular expressionslow · 19%
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for RegExr, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Release cadence | 91 | 0.07 | 6.1 | ✓ |
| Stars | 76 | 0.03 | 2.5 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Security score | 20 | 0.05 | 1.1 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Dependent projects | 0 | 0.08 | 0.0 | - |
| Development activity | 0 | 0.12 | 0.0 | ✓ |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 0 | mediumsource · 2026-10-15 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 10,376 | highsource · 2026-10-15 · 90% |
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Visualization: Yes · Interface type: web | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | JavaScript | highsource · 2026-10-15 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | GPL-3.0 | highsource · 2026-10-15 · 95% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Scorecard | 2 | highsource · 2026-10-15 · 90% |
Is RegExr the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank RegExr against the rest of the regex tools we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
This profile was built from public sources without asking you. You can take the badge below and use it anywhere, and you can claim the profile to correct anything we got wrong. Both are free, and neither moves RegExr up or down: nobody can buy rank here, including you.
Take the badge
Live, always current, and free to use on your own site. It shows RegExr's independent score and links back to this profile.
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<img src="https://www.vioscale.ai/badge/software/regexr.svg" alt="RegExr, verified on vioscaleAI" width="330" height="76" loading="lazy" />
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[](https://www.vioscale.ai/software/regexr)Claim the profile
Verify you control the domain, then point us at the pages that state the facts about RegExr and add your own description and media. Free, and it does not change the score.
- Correct anything wrong, with evidence
- Point our crawler at the pages that matter
- Write your own description and add media
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