# Oniguruma vs RegExr

| Attribute | Oniguruma | RegExr |
|---|---|---|
| **Vioscale score** | 57.6 (19% (low)) | 42.4 (19% (low)) |
| activity.commits_last_30d | 0 | 0 |
| adoption.github_stars | 2,523 | 10,353 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | Open-source regular expression library offering POSIX, GNU regex, and extended APIs with support for various character encodings. Available as a library for inclusion in programs on Linux, Unix, Cygwin, and Windows platforms. | 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. |
| language.primary | C | JavaScript |
| license.spdx | - | GPL-3.0 |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"linux":true,"windows":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-19T21:10:07.180Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://regexr.com/","retrievedAt":"2026-08-19T21:11:43.370Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 9 | 16 |
| release.history | `[{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.10","date":"2025-01-01T01:48:04Z","type":"stable","version":"v6.9.10"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.9","date":"2023-10-14T12:02:28Z","type":"stable","version":"v6.9.9"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.8","date":"2022-04-29T04:51:40Z","type":"stable","version":"v6.9.8"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.7.1","date":"2021-04-15T08:31:52Z","type":"stable","version":"v6.9.7.1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.7","date":"2021-04-14T07:31:53Z","type":"stable","version":"v6.9.7"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.7_rc1","date":"2021-03-31T01:39:52Z","type":"prerelease","version":"v6.9.7_rc1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.6","date":"2020-11-05T01:08:23Z","type":"stable","version":"v6.9.6"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.6_rc4","date":"2020-10-21T08:33:58Z","type":"prerelease","version":"v6.9.6_rc4"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.6_rc3","date":"2020-10-16T11:48:57Z","type":"prerelease","version":"v6.9.6_rc3"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.6_rc2","date":"2020-10-09T09:31:33Z","type":"prerelease","version":"v6.9.6_rc2"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.6_rc1","date":"2020-10-07T03:02:26Z","type":"prerelease","version":"v6.9.6_rc1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.5_rev1","date":"2020-04-26T07:38:34Z","type":"stable","version":"v6.9.5_rev1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.5","date":"2020-04-20T09:09:20Z","type":"stable","version":"v6.9.5"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.5_rc2","date":"2020-04-12T09:29:50Z","type":"prerelease","version":"v6.9.5_rc2"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.5_rc1","date":"2020-04-04T14:20:28Z","type":"prerelease","version":"v6.9.5_rc1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.4","date":"2019-11-29T04:38:34Z","type":"stable","version":"v6.9.4"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc3","date":"2019-11-22T04:26:02Z","type":"prerelease","version":"v6.9.4_rc3"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2","date":"2019-11-14T05:38:53Z","type":"prerelease","version":"v6.9.4_rc2"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc1","date":"2019-11-05T05:30:21Z","type":"prerelease","version":"v6.9.4_rc1"},{"url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.3","date":"2019-08-06T00:04:02Z","type":"stable","version":"v6.9.3"}]` | `[{"url":"https://github.com/gskinner/regexr/releases/tag/3.6.1","date":"2019-03-19T19:52:32Z","type":"stable","version":"3.6.1"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.6.0","date":"2019-03-16T15:42:52Z","type":"stable","version":"3.6.0"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.5.5","date":"2019-02-27T12:28:02Z","type":"stable","version":"3.5.5"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.5.4","date":"2019-02-26T15:39:20Z","type":"stable","version":"3.5.4"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.5.3","date":"2018-11-02T18:59:22Z","type":"stable","version":"3.5.3"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.5.2","date":"2018-10-05T17:31:39Z","type":"stable","version":"3.5.2"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.5","date":"2018-09-11T22:30:23Z","type":"stable","version":"3.5"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.4","date":"2018-07-04T17:50:49Z","type":"stable","version":"3.4"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.3","date":"2018-06-18T22:10:38Z","type":"stable","version":"3.3"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.2.1","date":"2018-06-13T17:46:08Z","type":"stable","version":"3.2.1"},{"url":"https://github.com/gskinner/regexr/releases/tag/3.2","date":"2018-06-11T17:56:39Z","type":"stable","version":"3.2"}]` |
| security.scorecard | 3.9 | 2 |

## Capabilities (Regex Tools)

| Capability | Oniguruma | RegExr |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Redos resistant | - | - |
| Lookaround support | - | - |
| Backreferences | - | - |
| Unicode property escapes | - | - |
| Named captures | - | - |
| Multi pattern matching | - | - |
| Interface type | - | - |
| Visualization | - | - |
| Code generation | - | - |

*Source: Vioscale. Generated 2026-09-01T15:09:45.714Z. "-" = undocumented, not absent.*