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A simple and easy-to-use textures packer and font atlas generator.

rTexPacker is a powerful tool to package sprites or fonts into an atlas, to improve drawing performance on games.

Multiple images can be automatically organized (packed) into a single bigger image, as well as the multiple text characters of a font required by a game.

Packaging method can be configured with several option like packaging algorithm, padding and spacing between image.

With rTexPacker you can easely package sprites and export atlas information in multiple formats (XML, JSON, CODE...).

• Package sprites and font glyphs into an atlas

• Configure packing algorithms, heuristics and manual placement

• Setup sprite padding, spacing, trimming and alpha-slicing

• Per-sprite tools: pivot, collider and tag editing

• Support relative paths and prepend-folder nameId export option

• Font generation options: Size, SDF, fixed height and monospace

• Import custom Unicode charset from UTF-8 file

• Export missing glyphs automatically

• Unicode charset duplicates removed automatically

• Load sprites with multi-file selection dialog

• Load sprites from multiple image formats: .png, .qoi, .tga, .jpg

• Load sprites from font files: .ttf, .otf

• Atlas visualization: Zoom, Pan, Grid, Background and Fill

• Multiple UI styles: Amber, Genesis and more

• New welcome/help windows and improved UI performance

• Load/Save portable self-contained .rtp project (compressed by default)

• Auto-save config on web platform

• Config file renamed: rtexpacker.ini

• Export atlas descriptor as: .rtpa, .rtpb, .json, .xml and code (.h)

• Export atlas image as: .png, .qoi, .dds and .raw

• Export atlas descriptor as PNG binary chunk: rTPb

• Command-line support: batch packing, slicing, tags and monospace

• Report unpacked sprites and improved rTPb export from CLI

• Maximum atlas size up to 16384×16384 pixels

• Completely portable (single-file, no dependencies)

• Cross-platform support: Windows and macOS (Intel + ARM)

• Updated to latest raylib 5.6-dev, raygui 4.5-dev and rini 3.0-dev

rTexPacker is handmade software, it has been meticulously developed using the C programming language, with great attention put on every line of code written. This approach usually results in highly optimized and efficient code, but it is also more time-consuming and require a higher level of technical skills. The result is great performance and small memory footprint.