TexturePacker Release Notes

New GameMaker data format that can be loaded with texturegroup_add() without a loader script
The existing GameMaker format is now called "GameMaker (loader script)"
Match the native look of Windows 11 and macOS 27 with the modern system styles

Sprite sheet splitter: sheets of solid tiles without transparency no longer lose a column to the background heuristic. The background color is only removed when the corners agree on it, and it is removed everywhere on the sheet, including pockets inside a sprite such as the space between a character's legs. The new Remove solid background checkbox below the algorithm tabs controls what the preview shows and what the saved sprites contain: switch it off to keep the background, or for tiles that happen to share a corner color. Formats without transparency such as JPEG always keep the background.
Start on Ubuntu 26 — the Debian package now pulls in the xcb/xkb runtime libraries the app needs
Unreal Paper2D no longer warns about a TexturePacker prefix mismatch on every import
Japanese and Chinese: Latin words and numbers are now separated from CJK text by a space throughout the interface
Missing AVX2 support: loading or exporting ASTC textures now reports an error instead of crashing

Flip textures vertically for all hardware formats — pvr, ktx, ktx2, zktx, astc, basis, dds and pkm — with the new --flip-y option or the "Flip texture vertically" checkbox
The zoom controls in the status bar now use icons instead of text labels

PVR files compressed with ETC keep their orientation flag when flipped
Command line: .astc, .basis and .pkm sprite sheets keep the pixel format when processing .tps files
Reopening a project restores the zoom level and does not block zooming
Matched the shortcuts of common graphics tools: Ctrl/Cmd 0 fits the sheet in the window, Ctrl/Cmd 1 zooms to 1:1
Quitting right after startup no longer crashes the app

Godot: Auto-detect animations — detected sequences are written to the .tpsheet data file, and the importer plugin (4.8.0) turns them into a ready-to-use AnimationLibrary for AnimationPlayer + Sprite2D, including trimmed sprites and multipack sheets
Godot: The exporter is now called godot-spritesheet — godot3-spritesheet still works for existing projects and scripts
Start screen: Godot joins the framework selection — click "Show all frameworks" for the full list
Oversized sprites now raise the maximum texture size to 4096 automatically, unless you've set one yourself

Sprite sheets are only numbered when multi-pack writes more than one sheet — a single sheet no longer becomes "sheet-0.png"
Choosing a framework without auto-multipack support no longer leaves auto-multipack enabled
Unsupported file types are now skipped when adding sprites, instead of showing as errors

Auto-multipack is now the default for new projects — the sprite sheet name no longer needs an {n} placeholder
Reveal the exported texture in Finder/Explorer after publishing
Keep the data file name when switching to another exporter

Added an "Export sprite sheet" button to the sidebar for quick, discoverable publishing

Sprite sheet splitter no longer freezes when loading large images
Floating licenses in Docker/CI: sporadic "Received GOAWAY" connection errors caused activate/deactivate to be retried after 5 seconds

Full release notes...

are available from https://www.codeandweb.com/texturepacker/download