sublimation → png
Prepare a sublimation design with a transparent background
* Free to use — selecting, editing and every export run in your browser, and nothing is uploaded unless you start a step that says it will: the AI tools, background removal on its sharper engine (an in-browser engine is one click away under the same button), or upscaling a photograph (logos and flat artwork are enlarged on your device). A free account (Google, Apple or an emailed code — no card) is needed to download the finished file, and comes with credits for the server-side tools.
Sublimation ink has no white, so whatever is behind your design is whatever the blank already is. That only works if the background is genuinely gone — and a white, cream or pale grey background will print, leaving a faint panel around the artwork on anything that is not pure white.
Clear a backgroundWhy the pale background still shows
A design saved on white looks perfectly clean against a white mug or shirt and then shows an obvious rectangle on ash, natural or beige. The fix is not to lighten the background: it is to remove it, so the blank shows through. Background removal here cuts the subject to real alpha and exports a PNG that carries the transparency with it — on our server by default, or on your own machine if you switch engine under the button.
Keep the resolution you started with
300 dpi at final size is the working rule, but the number that matters is the pixels you actually have. A 1000px graphic blown up to fill an 11in mug wrap is soft no matter what dpi the file claims. Start from the largest original you can get, and export without a resize step in between.
Where automatic removal earns its keep — and where it does not
Clean product shots, lettering, logos and illustrations cut out cleanly and instantly. Wispy hair against a cluttered background, and anything semi-transparent like glass or a veil, are the honest hard cases — the edge will need a pass with the brush. That touch-up is free and local too, so the only cost is a minute of your attention.
Frequently asked
Will it work on a design with text?
Yes, and if the text is part of a flat image you can also lift it onto its own editable type layer before exporting, which makes a size or wording change trivial later.
What format should I export?
PNG. It is the format that carries transparency reliably through sublimation software.
Is anything uploaded?
Export always runs on your device, and background removal will too if you pick its in-browser engine — the chooser is under the button. Its other engine, and the metered server features, do send the image; those are opt-in, labelled, and anything sent is deleted within 24 hours.
Keep reading
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