What is this JPEG to PNG converter?
A free, browser-based tool that converts JPEG images to PNG in batch. Upload one or many images, and download everything as a single ZIP — at the original resolution. All processing happens locally in your browser, so your images are never uploaded.
What JPG to PNG actually changes (and what it cannot)
Start with the uncomfortable fact: this conversion does not improve anything visually. JPG compression discards image detail permanently, and a PNG made from a JPG stores those same decoded pixels exactly, compression artifacts included. Quality stays identical; it never comes back. Size moves in the wrong direction: a photographic JPG typically grows 3 to 10 times when rewritten as PNG, because PNG's lossless storage is a poor match for photographs.
So as a delivery format for photos (websites, email, social), the PNG copy is strictly worse: the same image, several times heavier.
The cases where a PNG copy of a JPG is justified
Three reasons hold up in practice. First, hard requirements: some editors, asset pipelines, uploaders, and internal systems accept only PNG, and arguing with a file validator is not a workflow. Second, upcoming edit rounds: once you start annotating, cropping, or compositing, saving intermediate versions as PNG prevents new loss from stacking, whereas re-saving as JPG degrades the image a little every round. Third, planned transparency: if the image is headed into an editor to get a transparent background, PNG can carry that result and JPG cannot.
If none of these apply, keep the JPG. Converting to PNG for storage or "quality" reasons only spends disk space on the same pixels.
How to use it
- Upload one or more JPEG images on the left (drag & drop or click).
- Press “Convert & download zip” to get every image as PNG.