Notes on OpenPixels.
How the app works, what it measures, and where its limits are.
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How to change a photo background to white, free and without uploading it
Turn the background of a photo pure white in your browser, free and with no account. Step by step, with tips for a clean edge. The photo is never uploaded.
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How to restore old photos in your browser, without uploading them
Sharpen the faces, enlarge a small print and clear the grain from an old photo, free and in your browser. Step by step. The photo is never uploaded.
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How to fix a blurry photo in your browser, without uploading it
Make a blurry, pixelated or grainy photo clearer in your browser. Which setting fits which problem, step by step. Free, and the photo is never uploaded.
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Enlarged, not invented: how OpenPixels checks its own work
An AI upscaler can add detail that was never in the photo. OpenPixels does not ask you to take its word for it. After every run it shrinks the result back down, compares it with your original and shows you the numbers. This is what each one measures, the rule behind “Faithful to the original”, and the two kinds of run where the app declines to say it.