This converter rewrites JPG images as PNG files. It is the format most editors, design tools and asset pipelines expect, and it is required wherever an image must be edited repeatedly without degrading — every time a JPEG is opened, changed and saved, it is recompressed and loses a little more detail. PNG is lossless, so a file can be edited and re-saved indefinitely with no further loss.
It is worth being clear about what conversion can and cannot do. Compression damage already baked into a JPEG — the blocky texture in flat sky, the faint ringing around dark text — is part of the image data now. PNG preserves that data perfectly but cannot reverse it. What you gain is a stable starting point: no further loss from here on.
Decoding and re-encoding both happen on your machine using the browser’s own image pipeline. No copy of the picture is uploaded at any point.
| Result | |
|---|---|
| Pixel dimensions | Unchanged — no scaling is applied |
| Visible detail | Preserved exactly as it exists in the JPEG |
| Existing JPEG artefacts | Preserved too — conversion cannot undo them |
| Further quality loss | None, now or on any future save |
| File size | Typically 3–8× larger, especially for photographs |
| EXIF metadata | Dropped, including camera settings and GPS |
No, and no tool can. The detail a JPEG discarded during its original compression is gone. What PNG gives you is a lossless container, so nothing further is lost through subsequent edits and saves.
PNG compresses losslessly, which works well for flat colour and line art but poorly for the fine grain of a photograph. A three to eight times increase is normal for photographic content.
No. A JPEG has no transparency information to carry over, so the converted PNG is fully opaque. Creating a transparent background requires manually cutting out the subject in an image editor.
No. The picture is converted at its original pixel dimensions. If you also need it resized, use the Resize Image tool either before or after converting.
No. The image is redrawn onto a canvas and written out fresh, so camera metadata and location tags are not carried into the PNG.
Yes. Select as many files as you like; each is converted in turn and the results are delivered as a single ZIP archive.
