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Convert an image to grayscale online

Runs in your browser — this file is never uploaded

Strip the colour out of a photo, leaving only light and dark. Add your images and download the black-and-white result — no dial to fiddle with, just one clean conversion.

This is a genuine desaturation of every pixel, not a display filter — the grayscale is baked into the file you download, and it will look the same everywhere it is opened.

Your images never leave your device. The conversion runs entirely in your browser, so nothing is uploaded, stored, or scanned, and a batch costs no more than a single file.

or drop them here — nothing is uploaded

How to grayscale image

  1. Add your images

    Drop JPG, PNG, or WebP files into the box, or click to browse.

  2. Grayscale and download

    Press Grayscale Image. One file downloads on its own; several arrive as a ZIP.

Frequently asked questions

Are my images uploaded anywhere?

No. The conversion runs in your browser using JavaScript, so your files stay on your device. You can confirm this by opening your browser devtools Network tab while working — there are no upload requests.

Is this different from just viewing a photo in black and white?

Yes. A filter your photo app applies for viewing is not saved into the file — open it anywhere else and the colour is still there. This tool re-encodes the pixels themselves, so the grayscale travels with the file wherever it goes.

Does this reduce file size?

A little, usually, since a grayscale JPG has less information to encode than a colour one at the same quality. It is a side effect, not the point — use Compress Image if file size is what you actually need to reduce.

Can I undo this later?

No — converting to grayscale discards the colour data permanently, the same as it would in any editor. Keep your original file if you might want the colour version again.

Is there a limit on how many files?

Thirty at a time, which is a limit of your device rather than our policy — everything is held in memory while it works.

What about transparency in a PNG?

Kept exactly. Only colour is removed; the alpha channel is untouched.

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