Convert PAT to PNG

A graphics program or web service may require a rendered PNG when it cannot read a Photoshop or GIMP pattern preset. Converting a PAT pattern also lets you edit, share, or archive the texture as a standard image with transparency and lossless compression.

What the PAT format is

.pat is an ambiguous extension. Adobe Photoshop uses PAT files for saved pattern presets, while GIMP uses them for bitmap patterns applied with fills and brushes. A Photoshop or GIMP PAT commonly contains a small repeating tile, and some preset files can contain multiple patterns; it does not necessarily represent a complete picture.

Other applications use PAT for unrelated data. AutoCAD hatch-pattern files, for example, are text definitions describing line patterns rather than bitmap images. They must be rendered by a compatible CAD application before they can become PNG pixels. A PAT file from one graphics application may also be incompatible with another.

What the PNG format is

PNG is a raster image format supported by browsers, image editors, office software, and most operating systems. It uses lossless compression and supports an alpha channel, making it suitable for textures, line art, interface graphics, and patterns with transparent areas.

PNG stores rendered pixels, not PAT-specific information such as a Photoshop pattern name, preset category, repeat settings, or source application. Decide the output canvas size and background before exporting.

How to convert PAT to PNG

Using Adobe Photoshop

1. Create a new document at the required pixel dimensions. Use a transparent background if the finished pattern must retain transparent areas.
2. Import the pattern. In current Photoshop versions, open the Patterns panel, open its panel menu, and choose Import Patterns. In older versions, use Edit → Presets → Preset Manager, set the preset type to Patterns, choose Load, and select the PAT file.
3. Fill the canvas with the pattern using Edit → Fill, set Contents to Pattern, and select the imported item under Custom Pattern. Adjust scale, opacity, or blending only if required.
4. Export with File → Export → Export As, select PNG, and save. Transparency is retained only if the document still has transparent pixels; a solid background layer makes those areas opaque.

Using GIMP

1. Open Edit → Preferences → Folders → Patterns and identify a writable folder listed for pattern files.
2. Copy a GIMP-compatible PAT file into that folder, return to the Patterns dock, and use its refresh control. A Photoshop PAT file may not load because Photoshop and GIMP use different pattern formats.
3. Create an image at the required dimensions, select the Bucket Fill tool, set Fill type to Pattern fill, and choose the imported pattern.
4. Fill the canvas and use File → Export As. Give the file a .png extension, confirm the PNG settings, and preserve an alpha channel if transparency is needed.

Using an online converter

Online services such as Convertio and Zamzar may offer PAT-to-PNG conversion, but support depends on the PAT variant and the service's current parser. Upload only after the service identifies the input as a supported PAT file, then check the output dimensions, pattern content, and transparency. Do not upload confidential artwork, licensed texture packs, or proprietary files.

A direct online conversion may export only the stored tile, select the first pattern from a collection, or render it at an undocumented size. Use Photoshop or GIMP when the output must repeat across a specific canvas, preserve a chosen background, or use a particular scale.

Quality and compatibility limits

Choose the final canvas dimensions before rendering. Exporting the native tile preserves its original pixels; filling a larger canvas repeats that tile but does not add detail or improve resolution.

Use RGB or RGBA for broad PNG compatibility. Indexed or grayscale PNG can reduce file size but may change color or transparency behavior. PNG is lossless, so it does not introduce JPEG-style compression artifacts, but it cannot restore detail absent from the PAT tile.

If Photoshop or GIMP rejects the file, identify the program that created it and confirm that it is a bitmap pattern rather than an AutoCAD hatch definition or another application-specific PAT format. Renaming the extension does not convert the underlying data.