About EnlargePicture

Enlarging looks like a slider and is not. It is a resampling kernel, an order of operations, a set of ceilings imposed by browser canvases, and a genuinely difficult conversation about what a result means. A tool that offers it alongside twenty other features gives it a dropdown and a progress bar. We gave it a magnifier, a comparison you have to hold down, and a paragraph above the picture describing exactly which passes ran.

Everything else lives somewhere else on purpose. Setting an exact width and height is a different question with a different right answer, and so is working in centimetres or preparing something for a printer. Growing the canvas rather than the picture is the opposite operation entirely. Keeping the line tight is what lets this one get the depth.

There is no arrangement of arithmetic that returns information a camera never recorded. Any site telling you otherwise is describing a substitution and calling it a recovery.

• We do not ship a model and do not imply one.A trained network genuinely beats arithmetic on soft sources, and this build does not have one. The entry stays in the method list, greyed out and labelled, because a feature that is not built should look like a feature that is not built, and a greyed-out row you can read is worth more than a button that quietly does Lanczos and calls it AI.
• We do not promise quality is preserved.Recorded detail per pixel falls every time a picture is enlarged. That is arithmetic, not pessimism. What we can promise is that the spreading is done with a real kernel rather than a browser default, and that you can check the result at 1:1 before you commit to it.
• We do not keep anything.There is no account, no upload, no server-side processing and no storage. The picture is decoded into memory in your own tab, and closing the tab is the entire clean-up procedure.

Static pages, and nothing running anywhere but your own tab. The enlarger is hand-written TypeScript running in a Web Worker: separable convolution with precomputed weight tables, premultiplied alpha so cutouts keep clean edges, and a directional method that tests which way each edge runs before it interpolates. The clean-up pass targets the eight-pixel grid a JPEG encoder leaves behind and the colour channels it stores at half resolution, and it runs before the enlargement because afterwards is too late.

Preview and save call the same function with different input sizes. Nothing about the method changes between what you approved and what lands in your downloads folder.

• EnlargePicturePick 2×, 4× or 8× and watch the result at 1:1 before you save a thing.
• What enlarging can and cannot get backWorked through at 2×, 4× and 8×, with the part that is a guess named as one.
• Where a trained model beats arithmetic, and where it doesn'tThe case for the classical path, made fairly, including the cases it loses.
• PrivacyWhat this site can see, which is very little.