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Halftone Generator
Turn photos into dot, line, square or CMYK halftone art with screen angle, ink and paper colours.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Halftone Generator works
The image is sampled on a rotated grid and each cell is drawn as a shape sized by how dark it is. CMYK mode separates the image into four inks at classic screen angles and overprints them, like a printing press.
Input: JPG, PNG, WEBP, AVIF, TIFF. Output: PNG, JPG, WEBP.
How to use Halftone Generator
- Drop an image.
- Pick one ink, two inks or CMYK, and a dot shape.
- Adjust cell size, angle and contrast.
- Download at full size.
Tips
- Larger cells give a bolder poster look.
- Use cream paper and dark ink for a print feel.
Halftone Generator FAQ
- Is my file uploaded?
- No. Everything runs in this browser tab on your own device. Engines are downloaded once and cached, but your files never leave your computer.
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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