Converting CSH to SVG: What the Format Is and How to Get Vector Paths Out

The short answer

In a logo or graphics context, a CSH file is almost always an Adobe Photoshop Custom Shapes library. It stores one or more vector shapes that Photoshop's Custom Shape tool can draw. SVG is an open vector format that browsers, design tools and logo delivery packages widely accept. Because custom shapes are built from vector paths, it is generally possible to turn a CSH shape into an SVG without losing its outline. In practice, though, there is usually no direct one-click conversion. The common route goes through Photoshop: load the shapes, draw the one you need as a path, and export that path to a vector format. A vector editor then saves it as SVG.

The .csh extension is also used for C shell scripts, which are plain-text command files unrelated to graphics. If a CSH file opens as readable text containing commands, it is not a shape library and cannot be turned into an SVG image.

What a CSH file contains and what it does not

A custom shape stores outline geometry: the anchor points and curves that define the shape. It does not act as a finished logo file the way an SVG, AI or EPS deliverable does. Colors, strokes, effects and layer styles are applied in Photoshop when you draw the shape, so they generally do not travel with it. Expect to get an outline that you will need to fill and style again after export.

The file extension alone does not prove that a shape contains clean, editable vector paths. Some shape libraries were made by auto-tracing raster images, which can produce heavy, uneven paths. The only reliable check is to open the result and inspect the anchor points.

A typical conversion route

• 1. In Photoshop, load the CSH file through the Shapes panel (older versions use the shape picker's Load Shapes command; newer versions offer Import Shapes).
• 2. Select the Custom Shape tool, set the tool mode to Path, and draw the shape you want on a canvas. Path mode creates a work path rather than a pixel fill.
• 3. Use File > Export > Paths to Illustrator and choose the work path. This writes an Illustrator-format file that contains only the path outlines.
• 4. Open that file in Illustrator or another vector editor that can read it. The exported path usually has no fill or stroke, so it may look empty until you select all and apply a fill.
• 5. Clean up and recolor the artwork as needed, then save or export it as SVG.

Some Photoshop versions have offered SVG output from a shape layer, through options such as Export As or a copy-as-SVG command. These options have changed between releases, so check what your installed version provides rather than relying on them. Online converters and scripts that claim to read CSH files directly also exist, but no tested evidence about their accuracy was available for this article. If you use one, check its output with the steps below.

Check that the SVG is real vector artwork

An SVG file can hold true vector paths, but it can also wrap an embedded bitmap. That can happen if a shape was flattened, rasterized or exported through a pixel-based step along the way. Before you treat the result as a usable logo asset, check three things:

• Open the SVG in a vector editor and select the artwork. You should see editable anchor points and paths, not a single image object.
• Zoom in far. Vector edges stay sharp, while an embedded raster image becomes pixelated.
• If you are comfortable reading the file as text, look for path elements. An embedded image element containing encoded image data means the artwork is not truly vector.

Permission is a separate question

Being able to download or convert a shape library does not mean you are free to modify it, use it as a logo, or register it as a mark. Shape packs come with their own license terms, and a shape that reproduces an existing brand symbol may be protected as a trademark no matter what format it is saved in. Check the license for commercial and logo use before building brand assets from a CSH shape.

Limits of this overview

No subject-specific evidence was supplied. This article does not cover tested conversion results, version-by-version software behavior, or comparisons of third-party converters. The steps above rest on general, widely documented Photoshop and vector-format behavior. Menu names and available export options may differ in your software version.