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Tool guide
JPEG throws data away on every save, piling up halos around sharp edges. PNG compresses losslessly, which is why designers switch to it before editing a shot, layering text on it, or dropping it into a layout that will be resaved several times. This converter decodes the JPG in your browser and writes those exact pixels into a PNG. No fresh loss is introduced — but existing JPEG artefacts stay put, because detail already discarded cannot be recovered.
No. PNG supports an alpha channel, but a JPG has no transparency to carry over, so the background stays exactly as opaque as it was. Changing the container lets you add transparency later in an editor; it does not create any. Cutting a subject out needs a dedicated background-removal tool.
That is expected. JPEG discards high-frequency detail to stay small, while PNG must describe every pixel exactly. For a noisy, finely textured photo a four-to-six-fold increase is normal. If you need a lightweight file for the web, PNG is the wrong destination — look at WebP instead.
It does not, and this matters. The JPEG loss already happened in the camera or on the first save: blocking, ringing along contrast edges and smeared fine detail all carry into the PNG unchanged. What you gain is that further edits and resaves will no longer degrade the picture any further.
No. The image is redrawn through a canvas and comes out as plain pixels with no EXIF block, so camera model, timestamp and location do not reach the PNG. One side effect: a phone photo shot in portrait may save rotated, because the orientation flag lived in that same EXIF data.
Nothing is imposed by the site, but browsers cap the maximum canvas area, and Safari on iOS is markedly stricter than a desktop browser. Photos from current phones, 12 to 50 megapixels, convert without trouble. If the output comes back blank or black, try the page on a computer.
No. The file is read locally and painted onto a canvas inside your tab; the page never sends pixels to a server and keeps nothing between sessions. Closing the tab wipes whatever you loaded, so there is no delete button to hunt for.
Before: photo_2024.jpg — 3024×4032, quality 80, 1.8 MB
After: photo_2024.png — 3024×4032, lossless, roughly 9 MB
Before: scan.jpg — visible ringing around the letterforms
After: scan.png — same ringing, but no new damage on future saves
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