What changed in Czkawka from 11 to 12

Version 12.0.1 - 29.07.2026r

Czkawka GTK Deprecation Notice

Version 12.0 is the last released version of Czkawka GTK. No new binaries will be provided from this point on. All users are encouraged to migrate to Krokiet, the new Slint-based GUI frontend.

Core

• Fixed an issue where console windows appeared on Windows when running FFmpeg internally - #1989
• Added BuildRuntimeInfo, a new module that detects compile-time features (HEIF, LibRAW, AVIF) and the runtime availability of FFmpeg and FFprobe at startup - #1989

Krokiet

• Added a new "About / Diagnostics" panel to inspect build/runtime features and verify whether specific image files are recognized correctly - #1989
• Fixed the sort popup not displaying its background - #2011
• Fixed text overflowing in popups for some languages - #2011
• Fixed the Video Optimizer optimize confirmation popup content being cropped - #2011
• Added translations for settings dropdown options - #2011
• Pinned Slint to version 1.17.0 to avoid a Wayland bug introduced in 1.17.1 that prevented the window size from being restored correctly on startup - #2011

Cedinia

• Fixed an incorrect progress bar status - #1989
• Fixed automatic language detection on first launch - #1989
• Migrated all raw and unsafe JNI usage (file picker, notifications, Android path setup) to the new jni-high crate - #2011

Virustotal

• https://www.virustotal.com/gui/file/402fbf30ff5b8b675305e31b0da49c7e2a424f12fa20b9cb3cfe0c3a67f494c5
• https://www.virustotal.com/gui/file/433b96ceb2a9c58882342ac866ff9edaa928d11d031dfe41dfdeada5552f8ca1
• https://www.virustotal.com/gui/file/084fa6f9d97574704a5104d207b8805e510f3f1c9907e7828607e7fce6a67abf
• https://www.virustotal.com/gui/file/13f68c9b29b7667caf913c1223dbcdb58e9e51b8a050e00ed1f1fd31508d17b5
• https://www.virustotal.com/gui/file/464820ff4dac21dd490e36bb1a6a7ee9e0a55a62ea02c543cacf49b06f89de24
• https://www.virustotal.com/gui/file/ffc0ad76909dfb6806ee78acfea3615b5828baf2d648fac2a7265fd196bbca86
• https://www.virustotal.com/gui/file/9f1a8e51b4d0825c57379fb2d0e13f153e7c559aeb1e4e7c129ffe6b24e3aa15

Legend:

• If you are a beginner or don't know which version to use, start with one of these depending on your OS (if they don’t work, try different builds):
  • Windows – windows_krokiet_on_windows_skia_opengl.exe, windows_krokiet_on_linux.exe, windows_czkawka_gui_gtk_412.zip
  • Mac – mac_krokiet_skia_vulkan_x86_64, mac_krokiet_skia_vulkan_arm64, mac_czkawka_gui_x86_64, mac_czkawka_gui_arm64
  • Linux – linux_krokiet_x86_64, linux_krokiet_all_backends, linux_czkawka_gui_x86_64
• krokiet – primary graphical version of the application, fully supported and actively developed, includes new features and ongoing improvements
• gtk_gui – legacy GTK-based graphical version
• cedinia - new android app
• cli – command-line version of the app
• arm, x86_64 – CPU architecture. Most Windows/Linux uses x86_64, while on Mac the arm version is becoming the most common choice.
• heif, raw, avif – additional features that require extra libraries installed on the OS
• skia_opengl, skia_vulkan, femtovg_wgpu, all_backends – alternative Krokiet backends, use different, when you have problem with current
• deps - scripts that you can run, to install required/optional apps/libraries

You can read more about 12.0.0 version on Medium:

• English article – https://medium.com/@qarmin/krokiet-czkawka-12-0-6fa09c43c3b9
• Polish article – https://medium.com/@qarmin/krokiet-czkawka-12-0-c5dad2116793

Version 12.0 - 28.06.2026r

Czkawka GTK Deprecation Notice

Version 12.0 is the last released version of Czkawka GTK. No new binaries will be provided from this point on. All users are encouraged to migrate to Krokiet, the new Slint-based GUI frontend.

The source code remains in the repository and compatibility with czkawka_core will be maintained for some time so the application can still be built manually. However, all issues and feature requests specific to Czkawka GTK will be closed, except for critical problems affecting widely used unofficial builds such as Debian or Docker packages.

Breaking changes

Users

• Due to changes in the broken files mode, which now supports multiple checkers and includes additional checks, the file type is no longer stored in the cache. Existing cache files are incompatible with this version and will be automatically regenerated
• The prehash method has been updated, so cached hash is no longer valid, so it will be automatically regenerated
• Similar images cache files are incompatible with this version due to geometric invariance support and will be automatically regenerated
• Similar videos cache files are incompatible with this version due to the switch to a new visual matching engine and will be automatically regenerated
• The --crop-detect CLI option for similar videos now accepts true/false instead of none/letterbox/motion - the motion mode has been removed

Core

• Switched AV1 encoding from the very slow libaom-av1 to libsvtav1 - #1888
• Added a noise reduction option to Video Optimizer mode, which can significantly reduce file size for noisy videos - #1888
• Added support for custom optimization commands in Video Optimizer mode - #1888
• Added experimental hardware-accelerated video encoding - #1900
• Broken files can now be checked using multiple checkers - #1900
• Checking for broken videos has been split into fast (ffprobe - headers only) and slow (ffmpeg - full decoding) modes - #1900
• Added the ability to stop checking for hardlinks along with progress tracking of this operation - #1900
• Added the ability to exclude images/videos with the same resolution - #1900
• Added the ability to find similar videos by comparing their audio - #1919
• Empty files mode now allows detection of files containing only non-printable ASCII characters or null bytes (\0) - #1919
• Temporary files mode now allows customization of searched file extensions - #1919
• Prehash now also hashes the end of files to detect differences earlier - #1919
• Added support for detecting corruption in Fonts (TTF, OTF, TTC), Markup (JSON, XML, TOML, YAML, SVG), and Archives (7z, gz/tgz, tar, zst, bz2, xz) - #1919
• Added geometric invariance support for similar images mode, allowing mirrored, flipped, and rotated images to be matched - #1944
• Fixed a bug where relative symlinks were resolved without considering the parent directory - #1900
• Fixed a prehash cache bypass that caused full hash computation on some files during a second scan - #1907
• Extended integration tests, to prevent regressions in the future - #1919
• Fixed unstable prehash when the read syscall returned fewer bytes than requested - #1948
• Switched visual video duplicate detection engine from vid_dup_finder_lib to similario_core, adding configurable window count, duration tolerance, and subclip detection - #1948
• Fixed a bug where similar videos were not deleted when using reference-folder mode - #1948
• Replaced nom-exif with little_exif for reading EXIF orientation data - #1948
• Fixed reversed logic of hiding hardlinks in similar images/videos modes - #1952
• Added a $TRASH excluded-items preset (alongside the existing DEFAULT) to exclude common Trash/Recycle Bin paths from scans - #1962
• Reworked internal progress stage tracking, to unify progress calculations across all backends - #1962

GTK GUI

• Fixed a crash when using the sort button - #1837

Krokiet

• Added separate buttons for moving files to trash and permanently deleting them - #1900
• Added a new custom selection popup - #1809
• Added an image comparison tool to detect visual differences between similar images - #1888
• Added a context menu (right-click) - #1888
• File and folder selection dialogs no longer blocks the main thread - #1809
• Fixed an issue where thumbnail generation settings were not respected in Similar Videos mode - #1809
• Added notification support - #1837
• The femtovg backend no longer produces blurry fonts - #1900
• Changed default selection behavior from "select one item" to "select all except one item" - #1913
• Added the ability to configure which selection buttons are visible in the UI - #1913
• Added invert selection within groups - #1915
• Fixed shortest/longest path selection modes, which previously compared only paths without file names - #1919
• Ability to restore save/restore data in custom popup - #1919
• Added "Rename on conflict" option to the move/copy popup to automatically rename files instead of skipping them - #1948
• Added the ability to rename items - #1962

Cedinia

• Initial experimental release of Cedinia, a new Android app with touch support - #1821

Prebuilt binaries

• Linux prebuilt binaries now include AVIF support (requires libavif and libdav1d)
• Windows ZIP package now includes Krokiet binaries and a README to simplify migration to the new frontend
• Krokiet binaries for all backends are now packaged in ZIP files, with additional scripts to launch them with a selected backend
• Mac Intel binaries are no longer provided due to very long build times on GitHub CI
• Added installation scripts (misc/install_scripts/) for Linux (apt/dnf/pacman/zypper), macOS (Homebrew), and Windows (winget)

Virustotal

• https://www.virustotal.com/gui/file/fbdc5ced0fefd6f3222cf4920ede2c2c9f6286433a6a96b9c1e8e525c788597e
• https://www.virustotal.com/gui/file/cee1d000181c6ae8ebb7cb6d955edf4ac10aa0449654af2cfe8ce954df44e539
• https://www.virustotal.com/gui/file/6c65904eeb1de5b76a338906bc09bee5a4ddf1c977fff836a6cb3a41023a3dd4
• https://www.virustotal.com/gui/file/239cbed78b7a5780e705becedb24a86920edf1815b0740a82cd42c4608169630
• https://www.virustotal.com/gui/file/bb9c907035c1ae067aabfc4033eeb6a0565593edd15d770de0e7d42f9143b794
• https://www.virustotal.com/gui/file/0118f7760d5e924c50891daff977bb2f9226904b88a99679418cea28c29bbd8c
• https://www.virustotal.com/gui/file/fd0846799f8057717d6f96e663f7d8cc774c3d371d382f05745a14158d593d29
• https://www.virustotal.com/gui/file/a48d5f93508369982e8f78e81ce96f51aa65249d9013c73b4e152c56d2225a40

Legend:

• If you are a beginner or don't know which version to use, start with one of these depending on your OS (if they don’t work, try different builds):
  • Windows – windows_krokiet_on_windows_skia_opengl.exe, windows_krokiet_on_linux.exe, windows_czkawka_gui_gtk_412.zip
  • Mac – mac_krokiet_skia_vulkan_x86_64, mac_krokiet_skia_vulkan_arm64, mac_czkawka_gui_x86_64, mac_czkawka_gui_arm64
  • Linux – linux_krokiet_x86_64, linux_krokiet_all_backends, linux_czkawka_gui_x86_64
• krokiet – primary graphical version of the application, fully supported and actively developed, includes new features and ongoing improvements
• gtk_gui – legacy GTK-based graphical version
• cedinia - new android app
• cli – command-line version of the app
• arm, x86_64 – CPU architecture. Most Windows/Linux uses x86_64, while on Mac the arm version is becoming the most common choice.
• heif, raw, avif – additional features that require extra libraries installed on the OS
• skia_opengl, skia_vulkan, femtovg_wgpu, all_backends – alternative Krokiet backends, use different, when you have problem with current
• deps - scripts that you can run, to install required/optional apps/libraries

You can read more about 12.0.0 version on Medium:

• English article – https://medium.com/@qarmin/krokiet-czkawka-12-0-6fa09c43c3b9
• Polish article – https://medium.com/@qarmin/krokiet-czkawka-12-0-c5dad2116793