Grayscale Image

Turn any photo into grayscale without uploading. A single canvas pass desaturates pixels and downloads a new file.

Drag & drop your file here, or choose a source

Convert to grayscale locally — nothing uploaded

Computer · URL · Box · Dropbox · Google Drive · OneDrive

How to use this tool

Works with common raster formats in modern browsers.

Canvas applies a 100% grayscale filter locally.

Save the black-and-white result as a new Blob.

Is this tool free?

Yes. Format Convertly tools run free in your browser with no signup required.

Do you store my files?

No. Processing stays on your device — there is no tool upload to our servers.

Does it work on mobile?

Yes. Use any modern phone, tablet, or desktop browser.

Need a format conversion instead?

Open the converters catalog for JPG, PNG, PDF, MP4, and hundreds of other pairs.

Does compressing or converting images reduce quality?

Lossy compression can. Use higher quality settings when fidelity matters, and keep an original master. Lossless workflows preserve pixels.

Can you recover quality after compressing?

Not from the compressed file alone. Keep the original upload/export and recompress from that master if you need a better result.

What is generational loss?

Quality damage from repeatedly re-encoding lossy images. Avoid save→compress→save loops; work from a master.

Browse converters or jump back to the tool above.