Grayscale Image Converter
Convert any image to black and white online. Adjustable grayscale intensity slider, instant preview and free PNG or JPG download — no upload.
About the Grayscale Image Converter
Turn any photo black and white in seconds. Upload an image, and this tool instantly shows a grayscale preview; a 0–100% intensity slider lets you choose between a subtle desaturated look and full monochrome. Download the result as PNG (lossless, keeps transparency) or JPG (smaller file).
Grayscale conversion is done in your browser with the canvas filter API — the image is never uploaded to a server. That makes it a fast, private way to prepare black-and-white photos for printing, documents, retro-style social posts, or reducing visual noise in screenshots.
Partial grayscale (30–70%) is a popular effect too: it mutes colors for a cinematic, moody feel while keeping a hint of the original tones.
How to Use the Grayscale Image Converter
- 1Upload the image you want to convert.
- 2Adjust the intensity slider — 100% for pure black and white, lower for a faded-color look.
- 3Choose PNG or JPG and click Download.
Frequently Asked Questions
How do I convert an image to black and white for free?
Upload it here, leave the intensity slider at 100%, and download. The conversion happens instantly in your browser with no signup, watermark or upload.
What's the difference between grayscale and black and white?
In everyday use they mean the same thing: an image made only of gray tones. Strictly, 'black and white' can also mean pure two-tone (only black or white pixels), while grayscale keeps the full range of grays — which is what this tool produces.
What does the intensity slider do?
It controls how much color is removed. 100% gives a fully monochrome image; 50% keeps half the original color saturation for a muted, cinematic look; 0% leaves the image unchanged.
Does converting to grayscale reduce file size?
Often yes, especially for JPG output, because removing color detail makes the image easier to compress. The exact savings depend on the photo.
Will transparency be preserved?
Yes, if you download as PNG. Transparent areas stay transparent. JPG doesn't support transparency, so those areas are filled with white instead.