psfdiff(1)

🌈 psfdiff(1) — the vibe-check tool for fonts 💅

okay bestie, so psfdiff is your new obsession if you've ever been like "wait… are these two fonts literally the same or am I losing my mind?" ✨ It lives in the PSF Tools set (iykyk) and it does a visual compare of two PC Screen Font files. No cap.

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✨ SYNOPSIS ✨

psfdiff [-across=columns] INPUTFILE1 INPUTFILE2 [OUTPUTFILE]

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🦋 DESCRIPTION 🦋

So here's the tea ☕: psfdiff takes two fonts in the .PSF format and stacks them on top of each other into one bitmap in the PPM format. One font overlaid on the other, fr fr. That way you can just look at it and instantly see what's different — straightforward visual comparison, no detective work required. 🕵️‍♀️

Wanna see it right now? Just pipe the whole thing straight into xv -:

psfdiff font1.psf font2.psf | xv -

And the colours??? absolute main character energy 💖 Differences show up in colour, and here's the key:

• blue — pixels that are the same in both fonts 💙
• red — pixels that only exist in the first font ❤️
• green — pixels that only exist in the second font 💚

Not me getting emotional over a diff. 😭

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🎀 OPTIONS 🎀

• --across=columns — sets how many columns to display, bestie. Default is 32. The number of rows just gets derived from however many columns you picked, so you don't gotta think about it. ✨

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👀 SEE ALSO 👀

• xv(1) — the whole reason piping works, iconic
• psf2xbm(1) — another sibling in the font-nerd family

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👑 AUTHOR 👑

John Elliott <seasip.webmaster@gmail.com> — thank you for your service, king 🫶

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Version 1.1.3 🌸 28 April, 2026 — mwah, that's the whole page, hope it slayed bestie, go compare some fonts 💅✨