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iromoto-dev/pixelpass

Pixel Pass turns a painting or a photo into pixel art, right in your browser. Works locally on your device.

HTML

7

3 commits

updated Oct 17, 2026

pixelpass.iromoto.dev

See the code

See what people are saying

SourceMessageScoreDate

I built a free Pixel Art converter that also works on mobile (Open Source) (r/ClaudeAI)

I needed pixel art for another project and built this with Claude Code. After a *load-bearing* amount of testing, I’m quite happy with it, so why not share it? It runs on device in your browser (desktop, mobile) and supports custom presets. **Use it:**…

13

Oct 18, 2026

README

Pixel Pass

Turn a painting or a photo into pixel art, right in your browser.

Try it: pixelpass.iromoto.dev Runs in your browser Uploads: none Dependencies: none License: GPL-3.0-or-later

Pixel Pass with its sample, a painted summer beach: the picture left of the line, its pixel art right of it, the settings beside

Everything runs locally
Your picture is never uploaded, the page makes no network requests and uses no cookies or trackers.

Use it: pixelpass.iromoto.dev · or download index.html and open it, it works offline.

Features

  • Pixel size 1–16, palette from the picture or a classic one (PICO-8, Game Boy, C64, …)
  • Dither only on smooth areas, edges stay clean
  • Before/after slider, presets, PNG export with transparency
  • One HTML file, no dependencies, works offline

How it works

OKLab block reduction → k-means palette → Bayer dither on smooth areas → speck cleanup.

Build

The source is src/pixel-pass.html (plain HTML, CSS and JavaScript, no dependencies). build.py embeds the sample picture and writes the single-file index.html:

python build.py

Credits

  • Palettes: DawnBringer 32 by DawnBringer, Endesga 32 by ENDESGA, Sweetie 16 by GrafxKid, PICO-8 by Lexaloffle, Commodore 64 colours after Philip "Pepto" Timmermann, Game Boy's original four greens.
  • Sample picture: part of the demo only. It is not covered by the GPL and may not be used on its own; replace src/sample.webp with your own picture if you build on this project.
  • Icon and screenshots in docs/: not covered by the GPL either (the screenshots show the sample picture).

License

Copyright (C) 2026 iromoto

Pixel Pass is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version (GPL-3.0-or-later). See LICENSE. The sample picture, the icon and the screenshots are excluded (see Credits).

image-to-pixel-art
offline
pixel-art
pixelart
pixel-art-maker
webapp

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iromoto-dev/pixelpass

Pixel Pass turns a painting or a photo into pixel art, right in your browser. Works locally on your device.

HTML

7

3 commits

updated Oct 17, 2026

pixelpass.iromoto.dev

See the code

See what people are saying

SourceMessageScoreDate

I built a free Pixel Art converter that also works on mobile (Open Source) (r/ClaudeAI)

I needed pixel art for another project and built this with Claude Code. After a *load-bearing* amount of testing, I’m quite happy with it, so why not share it? It runs on device in your browser (desktop, mobile) and supports custom presets. **Use it:**…

13

Oct 18, 2026

README

Pixel Pass

Turn a painting or a photo into pixel art, right in your browser.

Try it: pixelpass.iromoto.dev Runs in your browser Uploads: none Dependencies: none License: GPL-3.0-or-later

Pixel Pass with its sample, a painted summer beach: the picture left of the line, its pixel art right of it, the settings beside

Everything runs locally
Your picture is never uploaded, the page makes no network requests and uses no cookies or trackers.

Use it: pixelpass.iromoto.dev · or download index.html and open it, it works offline.

Features

  • Pixel size 1–16, palette from the picture or a classic one (PICO-8, Game Boy, C64, …)
  • Dither only on smooth areas, edges stay clean
  • Before/after slider, presets, PNG export with transparency
  • One HTML file, no dependencies, works offline

How it works

OKLab block reduction → k-means palette → Bayer dither on smooth areas → speck cleanup.

Build

The source is src/pixel-pass.html (plain HTML, CSS and JavaScript, no dependencies). build.py embeds the sample picture and writes the single-file index.html:

python build.py

Credits

  • Palettes: DawnBringer 32 by DawnBringer, Endesga 32 by ENDESGA, Sweetie 16 by GrafxKid, PICO-8 by Lexaloffle, Commodore 64 colours after Philip "Pepto" Timmermann, Game Boy's original four greens.
  • Sample picture: part of the demo only. It is not covered by the GPL and may not be used on its own; replace src/sample.webp with your own picture if you build on this project.
  • Icon and screenshots in docs/: not covered by the GPL either (the screenshots show the sample picture).

License

Copyright (C) 2026 iromoto

Pixel Pass is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version (GPL-3.0-or-later). See LICENSE. The sample picture, the icon and the screenshots are excluded (see Credits).

image-to-pixel-art
offline
pixel-art
pixelart
pixel-art-maker
webapp

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Create pixel art from an image

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