Convert images to bitmap
Turn pictures into crisp 1-bit bitmaps with dithering and halftone, or save them as 8-bit and 24-bit BMP files. Adjust everything with a live preview, right in your browser and without uploading a thing.
Your files stay on your device: they are processed in this browser tab’s memory and never uploaded.
Dithering methods
Floyd–Steinberg gives fine, natural detail; Atkinson is punchier with cleaner highlights; Bayer creates the regular grid of classic computer graphics; Halftone builds printed-style dots; Threshold is pure black and white.
Real BMP files
Export true 1-bit, 8-bit greyscale or 24-bit colour BMP. Choose PNG instead when you want a transparent paper colour for compositing.
FAQ
What is the Pixel size setting?
It groups pixels into larger blocks for a chunky look. With Keep original dimensions on, the output stays the size of your image.
Can I use my own colours?
Yes. Ink and paper can be any colours, and they are stored in the 1-bit BMP palette too.
Are my images uploaded?
No. Everything runs inside this browser tab.
What can you do with an image to bitmap converter?
Motion designers and illustrators create the retro dithered look for posters, titles and loops; makers prepare 1-bit artwork for laser engravers, thermal printers and small e-ink or OLED displays; game developers produce pixel-style assets; and anyone working with older software gets the plain BMP files it asks for.