JPG to PNG Converter

Why convert JPG to PNG

JPEG is the format cameras and the web produce, but it is a poor fit for the second half of a design pipeline. It is lossy, so every re-save erodes a little more detail; it has no transparency; and some print suppliers, office tools and CMS media libraries simply refuse a file whose extension is not one they expect. Converting a JPG to PNG gives you a stable, lossless master that will not degrade each time it is opened, edited and saved again.

What actually happens to the pixels

The browser decodes your JPEG into an uncompressed bitmap using its native decoder, draws it onto an HTML canvas at its natural size, and serialises that canvas with the PNG encoder. Because PNG is lossless, the bytes that come out describe precisely the pixels that went in. It is important to be honest about what this means: the conversion adds no new quality loss, but it also cannot restore the detail the JPEG discarded when it was first saved. You get an exact copy of the decoded image, not a better photograph.

When PNG is the wrong target

Converting a photo to PNG trades smallness for editability: the PNG will typically weigh two to five times the JPEG it came from. That is fine for a master you intend to keep re-editing, and poor for a web page where every kilobyte is paid for by your visitors. If you only need the JPEG accepted by a stubborn form, this is the right tool; if you need the same picture smaller for the web, convert to WebP instead, and reserve PNG for screenshots, logos and images with hard edges where lossy compression would ring.

The metadata a PNG will not carry

Because the image is rebuilt through a canvas, the camera's EXIF block does not travel with it — no GPS coordinates, no make or model, no shooting settings, and no orientation tag. For a photo you are about to publish that absence is a feature: the location stamped on your phone is stripped in the same pass that changes the format. It also means the PNG opens the way you see it here rather than being rotated later by whatever app reads the metadata you no longer have.

Transparency, and a common misconception

A frequent reason people convert JPG to PNG is to gain a transparent background. That does not happen here, because a JPEG is a flat rectangle with no alpha channel to carry. The PNG produced from a JPEG is fully opaque, edge to edge. PNG preserves transparency only when the source already has it. If your real goal is a cut-out subject on a see-through background, the background remover is the tool for that; this converter is for making a lossless, universally accepted copy of an image that is already a complete rectangle.

Batch conversion, privately

Up to twenty files convert in one run, each up to 25 MB, processed one at a time so memory stays predictable, and a summary strip totals the batch before and after. Each result is named after its source with the new extension, and the result row reports the format that genuinely arrived and the size change it caused. Nothing is uploaded at any point: the decode, the re-encode and every download happen inside the tab, which is what makes this converter safe for personal photos and unreleased work. No account is asked for and no watermark is added, because there is no server on the other end that would need paying.

Deciding what to convert onward to

PNG is the right stopping point only sometimes. If the file is heading back into an editor as a lossless master, stopping here is correct. If it is going onto a page, though, the PNG you just made is heavier than it needs to be: run it onward to JPG to WebP for the same picture at a fraction of the weight, or squeeze the PNG you have with the compressor when you must keep lossless edges but still trim the file. And if the real goal was a transparent cut-out rather than a lossless copy, PNG cannot manufacture that from a flat JPEG — that is a job for the background remover, not this converter.