A skill for Claude

Grayscale, done in one line.

Drop in a photo, a folder, or a whole zip of images and say "grayscale these." No app to open, no settings to fiddle with — Claude just does it.

Download the skill Free · MIT licensed · zero external dependencies besides Pillow

What it does

One script, every input shape. Point it at a single image, several images, a folder, or a .zip archive — it figures out which and converts everything in one pass.

🖼️One image
🗂️A folder
📦A zip archive
🎞️Mixed batches
↓

Every file comes back grayscale, named Original-Grayscale.ext — PNGs and WebP keep their transparency.

Install it

  1. Download and unzip

    Use the button above, or clone github.com/moretothat/grayscale.

  2. Copy it into your Claude skills folder

    cp -r grayscale-main ~/.claude/skills/grayscale

  3. Install the one dependency

    pip install Pillow

  4. Restart Claude Code

    Start a new session so it picks up the skill. That's it — no config, no API keys.

Using Claude.ai or Cowork instead? Add the skill the same way through your skills settings, then upload images or a zip and say "convert these to grayscale."

Using it

Just ask, in plain language:

You:

grayscale this zip of vacation photos

You, with a single file:

make this image black and white

It never asks a clarifying question — it just runs the conversion and hands back the results. Works as a plain command-line tool too: python grayscale.py photo.jpg.