Convert JPG to PNG in your browser
This tool converts JPG/JPEG photos to PNG entirely in your browser, with no upload and no account. It’s useful when a design tool, CMS or printing service requires PNG, when you want a lossless working copy before editing, or when you need an image with a transparent layer added later.
How it works
Each file is decoded by the browser, drawn onto an HTML <canvas> at its native
resolution, then re-encoded with canvas.toBlob("image/png"). PNG uses lossless
DEFLATE compression, so no further quality is lost in the conversion. Multiple
files are processed in a loop; each result shows the original and output size and
gets its own download link.
Example
A 480 KB chart.jpg exported from a spreadsheet looks slightly blocky around the
text. Converting to PNG produces chart.png — typically larger (say 1.2 MB)
because PNG is lossless, but it stops any further JPG artefacting and is ready to
drop into a slide deck or design file.
| Format | Compression | Transparency | Typical size vs JPG |
|---|---|---|---|
| JPG (source) | Lossy | No | baseline |
| PNG (output) | Lossless | Yes (opaque here) | usually larger |
Everything happens locally — your images are never uploaded, stored, or seen by anyone.