CHANGELOG.md

MIME Types Changes by Version

3.2026.0421 / 2026-04-21

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0414 / 2026-04-14

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0407 / 2026-04-07

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0331 / 2026-03-31

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0317 / 2026-03-17

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

• Juliana Lucena (@julianalucena) added parquet extension for application/vnd.apache.parquet. #271

3.2026.0303 / 2026-03-03

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0224 / 2026-02-24

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0217 / 2026-02-17

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0210 / 2026-02-10

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0203 / 2026-02-03

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0127 / 2026-01-27

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0120 / 2026-01-20

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0113 / 2026-01-13

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

3.2026.0106 / 2026-01-06

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

• Manual contributions now require Signed-off-by trailers for assertion of the Developer Certificate of Origin. More details will be added in the coming weeks.

• Added application/microdata+json, application/speculationrules+json, text/event-stream and text/ping from the WHATWG HTML spec

3.2025.0924 / 2025-09-24

• Updated registry entries from the IANA media registry and provisional media registry and the Apache Tika media registry as of the release date.

• Removed the Apache httpd media registry from automatic updates. It is currently failing and no longer provides useful data compared to other sources.

3.2025.0916 / 2025-09-16

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0909 / 2025-09-09

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0902 / 2025-09-02

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0826 / 2025-08-26

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0819 / 2025-08-19

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0812 / 2025-08-12

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0805 / 2025-08-05

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0729 / 2025-07-29

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

• Remove .doc from text/plain: The use of .doc for text/plain documents is mostly a holdover from VAX VMS where the default wasn't .txt but .doc. The world now thinks that .doc mostly means application/msword even though that format is obsolete by almost twenty years. Closes ruby-mime-types#224 with #191.

• Handle promoted and withdrawn provisional IANA media types. Closes #54 with #192.

  The logic is three relatively simple phases:

  1. When loading an existing registry grouping (such as types/application.yaml), we mark any type that is provisional as obsolete. This indicates that we consider any provisional type as potentially withdrawn (and therefore obsolete).
  2. When processing existing regular types, we clear both provisional and obsolete flags so that a type promoted from provisional is now a regular registry entry.
  3. After merging the current list of registry entries, we clear provisional if the type is marked both provisional and obsolete, indicating that the provisional type has been withdrawn.

  These heuristics match several types which have been promoted and withdrawn since the handling of provisional types was improved with #53.

3.2025.0722 / 2025-07-22

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0715 / 2025-07-15

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0708 / 2025-07-08

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0701 / 2025-07-01

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0624 / 2025-06-24

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0617 / 2025-06-17

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0610 / 2025-06-10

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0603 / 2025-06-03

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0527 / 2025-05-27

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0520 / 2025-05-20

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0514 / 2025-05-14

• Updated registry entries from the IANA media registry and provisional media registry, the Apache httpd media registry, and the Apache Tika media registry as of the release date.

3.2025.0507 / 2025-05-07

• Added new data for pre-computed priority sorting. This new data requires Ruby mime-types 3.7.0 or later to manage data but is ignored by older versions of mime-types.

• Added a parser for the Apache Tika media registry to enrich the media definitions, mostly by adding new patterns for media type extensions. This parser:

  1. Parses the current tika-mimetypes.xml from the main branch of Tika on GitHub.

  2. Skips over any mime-type record that has attributes. That is, any record which looks like media/subtype;format=foo or media/subtype;version=2 will be skipped. Support for attributes does not currently exist in the mime-types library.

  3. Extracts the glob entries for use in the extensions field. Globs that use * in the middle of a filename are excluded, because that's now how the Ruby MIME::Types field works (I could add a new glob field, but that will take a bit more work).

  4. Updates the extensions field for any existing MIME::Type or creates new unregistered (not defined in IANA) types for new ones.

• Updated the history body to reflect the new data source for updates.

• Some details were removed from older CHANGELOG entries relating to updated MIME types from more or less automated processes.

3.2025.0506 / 2025-05-06

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0429 / 2025-04-29

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0422 / 2025-04-22

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0408 / 2025-04-08

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0402 / 2025-04-02

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0325 / 2025-03-25

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0318 / 2025-03-18

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0304 / 2025-03-04

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2025.0220 / 2025-02-20

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added trusted publishing for fully automated releases. Developed by Samuel Giddins in #109, merged manually with some updates.

3.2025.0204 / 2025-02-04

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added the Changelog URL to the README so that RubyGems.org is updated with the changelog_uri on release. Contributed by Mark Young in #96.

• Fixed an issue with automated releases that added thousands of files because vendor/ was no longer ignored.

• Fixed the automated release builder process to handle the case when the automatic-release tag is followed by a ## NEXT / YYYY-MM-DD header so that changes merged normally are picked up on automatic releases. #98

3.2025.0107 / 2025-01-07

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Restructured documentation for how I prefer to manage Hoe projects now.

• Reworked the Rakefile because all data updates are now managed by GitHub Actions and should not be managed manually any longer.

  • rake release:prepare now does the same work as rake release:gha, but does not commit or create a pull request.

  • rake convert no longer has any subtasks.

  • rake update has been removed with no replacement.

• Updated .hoerc to properly exclude support/ and types/ from the manifest.

3.2024.1203 / 2024-12-03

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.1105 / 2024-11-05

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.1001 / 2024-10-01

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0903 / 2024-09-03

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0820 / 2024-08-20

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added .jxl extension for image/jxl. Contributed by Shane Eskritt in #81.

3.2024.0806 / 2024-08-06

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0702 / 2024-07-02

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

  • This update adds a new haptics/ group with three media types defined.

• Moved extensions from audio/x-aac to audio/aac and mark audio/x-aac as obsolete. Based on #77 by Samuel Williams.

  • Made the same changes for audio/flac and audio/matroska.

3.2024.0604 / 2024-06-04

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Internal changes:

  • Update to latest version of Rubygems for testing.

  • Remove restriction on Pysch version as that does not work well with current Rubies.

  • Fix a bug with the history generation on automatic updates.

3.2024.0507 / 2024-05-07

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0402 / 2024-04-02

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0305 / 2024-03-05

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0206 / 2024-02-06

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2024.0102 / 2024-01-02

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.1205 / 2023-12-05

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.1107 / 2023-11-07

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.1003 / 2023-10-03

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.0905 / 2023-09-05

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.0808 / 2023-08-08

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2023.0218.1 / 2023-02-18

• When this data library was created in 2015, I made the decision based on information available to deprecate text/javascript in favour of application/javascript. Since the previous update (2022-01-05), IANA has officially deprecated application/javascript in favour of text/javascript. Samuel Williams discovered this in #55 by noting that all js types were marked obsolete in version 3.2023.0218.

  A hot fix has been applied to resolve this. However, note that application/javascript will not be returned by default, only text/javascript.

3.2023.0218 / 2023-02-18

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Mohammed Gad added the jfif file extension for image/jpeg text format. #52

• Reworked the loading of IANA provisional media registries to merge them into the top-level media-type registries instead of a standalone registry file. #53 originally identified by Chris Salzberg in #50.

  It is worth noting that this is an imperfect solution as if a media type is provisionally registered and withdrawn, it will linger in the registry with no clean way of identifying them at the moment. See #54.

  This release also fixes ruby-mime-types#163, where logs show "Type application/netcdf is already registered as a variant of application/netcdf".

3.2022.0105 / 2022-01-05

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Fixed an incorrect definition of image/bmp, which had been marked obsolete and later registered. Fixed #48, found by William T. Nelson.

3.2021.1115 / 2021-11-15

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added conversion utilities that support the mini_mime data format. These have been ported from the mini_mime repository. #47

• Added IANA provisional media registries. Added some notes to CONTRIBUTING about the transient nature of the provisional registration data. This was triggered in part by a pull request by Jon Sneyers. Thanks! #45, #43

3.2021.0901 / 2021-09-01

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added file extension for WebVTT text format. #46

3.2021.0704 / 2021-07-04

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

3.2021.0225 / 2021-02-25

• Updated registry entries from the IANA media registry and provisional media registry and the Apache httpd media registry as of the release date.

• Added file extension for AVIF video format. #40

3.2021.0212 / 2021-02-12

• Updated the IANA media registry entries as of release date.

• Added a new rake task (release:automatic) that downloads and converts the data from Apache httpd and IANA registries; if there are changes detected, it updates the release version, changelog, manifest, and gemspec and commits the changes to git.

3.2020.1104 / 2020-11-04

• Updated the IANA media registry entries as of release date.

• Added application/x-zip-compressed. #36

• Updated the contributing guide to include information about the release process as described in #18

• Corrected a misspelling of Yoran Brondsema's name. Sorry, Yoran. #35

3.2020.0512 / 2020-05-12

• Updated the IANA media registry entries as of release date.

• Added file extensions for HEIC image types. #34

3.2020.0425 / 2020-04-25

• Updated the IANA media registry entries as of release date.

• Added several RAW image types based on data from GNOME RAW Thumbnailer. #33 fixing #32

• Added audio/wav. #31

• Added a type for Smarttech notebook files. #30

• Added an alias for audio/m4a files. #29

• Added application/x-ms-dos-executable. #28

3.2019.1009 / 2019-10-09

• Updated the IANA media registry entries as of release date.

• Reordered the .ai extension so that it is not the preferred extension for application/pdf #24

3.2019.0904 / 2019-09-04

• Updated the IANA media registry entries as of release date.

• Moved the .ai extension from application/postscript to application/pdf. #23 fixing #22

3.2019.0331 / 2019-03-31

• Updated the IANA media registry entries as of release date.

• Added support for application/wasm with extension .wasm. #21

• Fixed application/ecmascript extensions. #20

3.2018.0812 / 2018-08-12

• Added .xsd extension to text/xml. pull-10

• Added .js and .mjs extensions to text/ecmascript and text/javascript. #11

• Added .ipa extension to application/octet-stream. #12

• Moved extensions .markdown and .md and added .mkd extension to text/markdown. #13

• Because of a bug found with mime-types 3 before 3.2.1, this version requires mime-types 3.2 or later to manage data.

• Updated the IANA media registry entries as of release date. The biggest major change here is the addition of the font/ top-level media type.

• MIME type changes not introduced by pull requests will no longer be individually tracked.

• Clarified that the YAML editable format is not shipped with the Ruby gem for size considerations.

3.2016.0521 / 2016-05-21

• Updated the known extension list for application/octet-stream and application/pgp-encrypted to include gpg as an extension. Fixes #3 by Tao Guo (@taonic).

• Updated the IANA media registry entries as of release date.

• This version requires mime-types 3.1 or later to manage data because of an issue with JSON data encoding for the xrefs field.

3.2016.0221 / 2016-02-21

• Updated the known extensions list for audio/mp4.

• Updated to Contributor Covenant 1.4.

• Shift the support code in this repository to be developed with Ruby 2.3. This involves:

  • Adding frozen_string_literal: true to all Ruby files.
  • Applied some recommended readability and performance suggestions from Rubocop. Ignored some style recommendations, too.
  • Replaced some cases of foo.bar rescue nil with foo&.bar.

3.2015.1120 / 2015-11-20

• Extracted from ruby-mime-types.

• Added a Code of Conduct.

• The versioning has changed to be semantic on format plus date in two parts.

  • All registry formats have been updated to remove deprecated data.
  • The columnar format has been updated to store three boolean flags in a single flags file.

• Updated the conversion and management utilities to work with ruby-mime-types 3.x.

• Updated the IANA media registry entries as of release date.

2.6.2 / 2015-09-13

• Updated the IANA media registry entries as of release date.

2.6 / 2015-05-25

• Steven Michael Thomas (@stevenmichaelthomas) added woff2 as an extension to application/font-woff, ruby-mime-types#99.
• Updated the IANA media registry entries as of release date.

2.5 / 2015-04-25

• Updated the IANA media registry entries as of release date.

• Andy Brody (@ab) fixed a pair of embarrassing typos in text/csv and text/tab-separated-values, ruby-mime-types#89.

• Aggelos Avgerinos (@eavgerinos) added the unregistered MIME type image/x-ms-bmp with the extension bmp, ruby-mime-types#90.

2.4.2 / 2014-10-15

• Added application/vnd.ms-outlook as an unregistered MIME type with the extension msg. Provided by @keerthisiv in ruby-mime-types#72.

2.4.1 / 2014-10-07

• Changed the sort order of many of the extensions to restore behaviour from mime-types 1.25.1.
• Added friendly MIME::Type descriptions where known.
• Added reg, ps1, and vbs extensions to application/x-msdos-program and application/x-msdownload.
• Updated the IANA media registry entries as of release date.

2.3 / 2014-05-23

• Updated the IANA media registry entries as of release date.

2.2 / 2014-03-14

• Added .sj to application/javascript as provided by Brandon Galbraith (@brandongalbraith) in ruby-mime-types#58.

• Marked application/excel and application/x-excel as obsolete in favour of application/vnd.ms-excel per ruby-mime-types#60.

• Merged duplicate MIME types into the registered MIME type. The only difference between the MIME types was capitalization; the MIME type registry is case-preserving.

• Updated the IANA media registry entries as of release date.

2.1 / 2014-01-25

• The IANA media type registry format changed, resulting in updates to most of the 1,427 registered MIME types.

  • Many registered MIME types have had some metadata updates due to the change in the IANA registry format.
    • MIME types having a publicly available registry application now include a link to that file in references.
  • Added xrefs data as discovered (see the API changes noted above).

• The Apache httpd mime types configuration has been added to track additional common but unregistered MIME types and known extensions for those MIME types. This has affected many of the available MIME types.

• Merged the non-standard VMS platform text/plain with the standard text/plain.