# MozJPEG

JPEG encoder that patches libjpeg-turbo to produce smaller JPEG files at the same visual quality, usable as a drop-in libjpeg library.

STUB. This software has no release or pre-release in four years, or its project site no longer shows it, so it is not part of the register, not counted and not indexed. It will be checked again.

Source: https://findsoftware.frbit.cloud/mozjpeg/
Last reviewed: 2026-10-28
Listed since: 2026-10-28

## Record

### Links

- repository: https://github.com/mozilla/mozjpeg

### Identity

- status: stub
- maintainer: Mozilla
- maintainerType: unknown
- parent: unknown
- firstRelease: 2014
- hqCountry: unknown

### Kind

- category: media, build-tool
- hosting: unknown
- language: c
- runtime: unknown
- runtimeMin: unknown
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: unknown
- renderingModes: not applicable
- installMethod: CMake build from source, the same as libjpeg-turbo

### License

- licenseModel: open-source
- license: IJG, Zlib, BSD-3-Clause

### Releases

- currentMajor: 4
- latestReleaseDate: 2022-08-15

### Adoption

- githubStargazers: 5739
- packagistDownloads: not applicable
- npmWeeklyDownloads: not applicable
- contributors: 77
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- urls: https://api.github.com/repos/mozilla/mozjpeg (read 2026-10-28)
- maintainer: https://github.com/mozilla/mozjpeg/blob/master/README.md (read 2026-10-28)
- firstRelease: https://api.github.com/repos/mozilla/mozjpeg/releases (read 2026-10-28)
- language: https://api.github.com/repos/mozilla/mozjpeg (read 2026-10-28)
- category: https://github.com/mozilla/mozjpeg/blob/master/README.md (read 2026-10-28)
- category: https://github.com/mozilla/mozjpeg/blob/master/README.md (read 2026-10-28)
- installMethod: https://github.com/mozilla/mozjpeg/blob/master/README.md (read 2026-10-28)
- installMethod: https://github.com/mozilla/mozjpeg/blob/master/BUILDING.md (read 2026-10-28)
- license: https://github.com/mozilla/mozjpeg/blob/v4.1.1/LICENSE.md (read 2026-10-28)
- license: https://github.com/mozilla/mozjpeg/blob/v4.1.1/LICENSE.md (read 2026-10-28)
- license: https://github.com/mozilla/mozjpeg/blob/v4.1.1/LICENSE.md (read 2026-10-28)
- licenseModel: https://github.com/mozilla/mozjpeg/blob/v4.1.1/LICENSE.md (read 2026-10-28)
- currentMajor: https://api.github.com/repos/mozilla/mozjpeg/releases/latest (read 2026-10-28)
- latestReleaseDate: https://api.github.com/repos/mozilla/mozjpeg/releases/latest (read 2026-10-28)
- githubStargazers: https://api.github.com/repos/mozilla/mozjpeg (read 2026-10-28)
- contributors: https://api.github.com/repos/mozilla/mozjpeg/contributors?per_page=1 (read 2026-10-28)

## Notes

MozJPEG is a C library that patches libjpeg-turbo to encode JPEG files at smaller sizes for the same visual quality. It keeps the libjpeg API, so it can take the place of libjpeg in a program that uses that API. The project aims at graphics programs and image processing tools, which call the library; a cjpeg command-line tool is included as a demonstration. The source is built with CMake in the same way as libjpeg-turbo, and Windows builds can use vcpkg. The project is maintained by Mozilla on GitHub.

---

Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0