Free online WEBP to PAT converter

Files ending in .webp can be either graphics images or CAD hatch-pattern sources, so the required conversion depends on the file’s contents. This page handles both cases and lets you choose either a Photoshop pattern or an AutoCAD hatch pattern as the PAT output.

How to tell which WebP file you have

Check the program that created the file, then inspect its header and contents. A graphics WebP is binary image data with a RIFF container and a WEBP signature near the beginning; browsers, image editors, graphics exporters, and web systems commonly create it. It contains pixels and may use lossy or lossless compression, transparency, or animation.

A CAD-format WebP belongs to a CAD hatch-pattern workflow rather than the ordinary web-image format. It is typically readable text containing pattern records with angles, origins, offsets, line lengths, and dash or gap spacing. Open a copy in a plain-text editor: readable numeric records indicate the CAD interpretation, while binary data beginning with a RIFF header indicates a graphics WebP. A CAD program may also produce an ordinary binary WebP as a texture or drawing attachment, so the file contents take priority over the program association.

WebP image to a Photoshop pattern

A graphics WebP is a raster image. Its PAT conversion creates a repeating Photoshop pattern from the pixels; it does not produce editable vector geometry. PAT in this context is Adobe Photoshop’s raster pattern preset format, while AutoCAD PAT is a separate text-based hatch-definition format.

To convert it on 101convert.com, upload the file, select Photoshop pattern in the converter switch, start the conversion, and download the resulting .pat file. The service can be used free without installing software.

For a desktop workflow, open the image in Photoshop with File → Open, crop or resize it to the intended tile, and choose Edit → Define Pattern. Export the defined pattern through the Patterns panel or preset-management command available in that Photoshop version. GIMP can also create a PAT pattern: open the image, choose File → Export As, use a filename ending in .pat, enter the pattern name when prompted, then install the file in GIMP’s patterns folder and refresh the pattern list.

CAD WebP hatch pattern to an AutoCAD PAT

The CAD interpretation converts a text-based hatch-pattern source into an AutoCAD-compatible PAT definition. AutoCAD PAT files describe repeated straight-line families using angle, origin, offset, and dash or gap lengths; they do not store photographic pixels, colors, alpha transparency, or arbitrary shaded areas.

On 101convert.com, upload the CAD-format file, select AutoCAD hatch pattern in the converter switch, start the conversion, and download the generated .pat file. Open the output in a plain-text editor and check the pattern name and line records before using it.

In AutoCAD, copy the PAT file into a folder listed in Options → Files → Support File Search Path. Reload the hatch-pattern list or restart AutoCAD, then select the pattern from the hatch-pattern controls. Other AutoCAD-compatible CAD applications may use different folders or reload commands.

Quality and compatibility limits

A Photoshop pattern remains resolution-dependent: enlarging its tile exposes pixels, while reducing it can remove fine detail. Lossy WebP compression may already have introduced artifacts, and transparency can be retained only in the raster-pattern workflow.

An AutoCAD PAT cannot represent a bitmap directly. If the CAD source is actually an image or contains curves, colors, or shading rather than line-spacing definitions, it must first be simplified or traced into repeating line geometry. Keep hatch spacing in the target drawing units and test complex dash sequences in the destination CAD program.

Photoshop PAT and AutoCAD PAT are not interchangeable; select the output mode that matches the application that will use the file.