Vector
What is a PS file?
PS (PostScript) is a page description language built for printers and professional publishing. Instead of storing pixels, it stores instructions for drawing text, shapes, and images, so pages scale to any size without losing sharpness. It's lossless and precise for print, but most modern software can't open it directly anymore.
- Extension
- .ps
- Type
- Vector
- Typically
- Print, PostScript documents
- Transparency
- None
Why PS exists
Adobe introduced PostScript in the early 1980s to give printers a common language for describing a page. Rather than sending a printer a picture, a computer could send it a script: draw this line here, fill this shape, place this letter at this position. It became the standard behind professional typesetting and printing through the 80s and 90s.
That's still how a PS file works. It's essentially a small program written in plain text, listing the fonts, curves, fills, and images that make up a page. A printer or PostScript interpreter reads those instructions and renders them at whatever resolution the output needs, so the page stays crisp whether it's printed at business-card size or on a large poster.
PDF grew directly out of PostScript, and largely replaced it for everyday use because it's more portable and doesn't need a full interpreter to view. People mostly run into PS files now as leftovers from an older workflow: a print shop export, a scientific paper's source files, an old design archive, or a "print to file" option in aging software. Modern devices usually need it converted to PDF or an image before it will open at all.
PS files can be large and are strictly page-based rather than easy to edit like a modern vector file, which is part of why they're mostly seen today rather than created.
The trade-offs
Strengths
- Scales to any size without losing sharpness
- Exact, predictable output for professional printing
- Stores text, vector shapes, and images in one file
- Plain-text instructions, so the file isn't a black box
Watch-outs
- Not natively viewable on most modern devices or apps
- Mostly superseded by PDF for everyday sharing
- Files can be large and awkward to edit directly
- Usually needs converting before you can open or print it easily
A note on privacy
A PS file doesn't carry location data the way a photo does, but it can carry document details like the title, creation date, and embedded fonts from whoever generated it. If you convert it through an online tool, that file and its embedded details get uploaded to someone else's server. Converting on your own machine keeps the document and everything in it local.
Convert a PS file
Questions
How do I open a PS file?
Most modern devices don't open PS files directly, since they need a PostScript interpreter. The simplest route is converting it to PDF or an image first, which any current viewer can open.
Is PS the same as PDF?
No, but they're closely related. PDF grew out of PostScript and was designed to be easier to view and share, which is why PDF replaced PS for most everyday use.
Why do I have a PS file?
It usually comes from an older print workflow, a "print to file" option, a print shop export, or older publishing and scientific software that still outputs PostScript.
Can I convert PS without uploading it?
Yes. A desktop app like Morphjet converts PS to PDF or an image on your own computer, so the file never has to leave your machine.
Morphjet opens and converts PS, one of 2,748 conversions it runs on your own computer. Coming soon.