Free tool · runs in your browser
Colour adjuster.
Grade your cover artwork before it goes out — exposure, contrast, temperature, fade, grain and vignette — then export a square the streaming stores will accept. Your file never leaves your device.
Drop your cover art here
JPG, PNG or WebP up to 40 MB. The file never leaves this device — grading happens in your browser.
Export
Non-square artwork is centre-cropped when you export a square size — that is what Spotify, Apple Music and the rest require (3000 × 3000, under 650 × 650 is rejected by some stores).
Looks
Adjust
Artwork the stores accept
Spotify / Apple Music
3000 × 3000px, square, JPEG or PNG, no blur or pixelation
File size
Under 20 MB; most stores reject anything above 650 KB for small artwork
Text on the cover
Optional, but it must match the release — no store logos or URLs
Colour space
sRGB. Anything wider (Display P3, CMYK) shifts when a store converts it
Questions
Is my artwork uploaded anywhere?
No. Every adjustment is drawn on a canvas in your own browser and the download is generated there too. Nothing is sent to a server, which is the point when the cover belongs to a song nobody has heard yet.
Why does the export look slightly different from the preview?
It should not. The preview and the export run through the same rendering code; the only differences are resolution-dependent effects (softness and grain), which scale with the output so they read the same at 3000px as they do on screen.
My artwork is not square. What happens?
The preview keeps your aspect ratio. When you export a square size the image is centre-cropped to fill it, which is what the stores require — check the framing before you download, and re-crop at source if the subject sits off-centre.
Can you grade it for me instead?
Yes — that is part of a release through the distribution service. Submit the artwork with your song and the studio will check it against store specs before the release goes out.