How to Make a Bitmap in Photoshop
Photoshop can turn an image into a true 1-bit bitmap through Bitmap mode. Here is exactly how — including why the option is sometimes greyed out — and a quicker online alternative when you just need the result.
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Bitmap mode in Photoshop, step by step
1. Open your image. 2. Go to Image → Mode → Grayscale and flatten if asked. 3. Go to Image → Mode → Bitmap. 4. Set the output resolution and choose a method — Diffusion Dither or Halftone Screen give the classic looks. 5. Click OK, then export.
Why is Bitmap greyed out in Photoshop?
A common snag: bitmap is greyed out because the image is still in RGB or CMYK. Bitmap mode is only available from Grayscale, so convert to grayscale first and the option becomes clickable.
The faster way: do it online in seconds
If you do not need Photoshop for anything else, skip the mode juggling. The online converter gives you a live preview, twelve dithering methods, colour control and instant BMP/PNG/SVG export — no grayscale step, no flattening, no waiting.
- Open the converter and drop your file in (or paste from the clipboard).
- Pick a dither method — Atkinson and Floyd–Steinberg suit photos; Threshold gives a hard black-and-white cut.
- Adjust pixel size, threshold, brightness and contrast until it looks right.
- Download as PNG, a real
.bmpfile, or scalable SVG.
Related converters & guides
Frequently asked questions
How do I make a bitmap in Photoshop?
Convert the image to Grayscale, then Image → Mode → Bitmap, choose a dither method, and export.
Why is Bitmap mode greyed out?
Because the image is in RGB or CMYK. Switch to Grayscale first and Bitmap mode becomes available.
Is there a faster alternative to Photoshop?
Yes. A free online converter turns any image into a bitmap in seconds with a live preview and more dither options.
Does the online tool need Photoshop installed?
No. It runs entirely in your browser with nothing to install.
Can I get the same diffusion-dither look?
Yes — choose Floyd–Steinberg or Atkinson for a diffusion look, or Halftone for dots.