Convert JPG to PNG Online — No Upload, No Watermark
PNG is lossless and supports transparency, making it the right format for screenshots, logos, and graphics that need crisp edges.
Drop image (PNG/JPG/WebP/AVIF/HEIC)
Up to 50 MB
Where JPG files come from
This is usually a step before editing: a JPEG needs a transparent background cut out, or it is going through several rounds of edits where repeated JPEG saving would accumulate damage.
What changes when you convert JPG to PNG
| Encoding | JPEG decoded and stored losslessly as PNG |
|---|---|
| File size | Grows, often several times over |
| Quality | Exactly what the JPEG contained, with no further loss |
Worth knowing first
PNG does not repair JPEG artefacts. Any blocking or ringing already in the file is preserved perfectly. The benefit is that nothing more is lost from here on, which matters if the image faces several rounds of editing.
FAQ
Does PNG improve a JPEG?
No. It stores the decoded image without further loss, artefacts included. What it prevents is the next round of damage, which is why it is a sensible working format mid-edit.
Why did the file get bigger?
PNG is lossless, so it cannot discard detail the way JPEG does. Photographic content in particular compresses poorly losslessly, so several times the size is normal.
When is PNG the right final format?
When the image needs transparency, or when it is a screenshot, diagram or anything with text and sharp edges. For photographs on the web, JPEG or WebP is smaller and looks the same.
Is this JPG to PNG converter free, with no upload?
Yes. The image is decoded and re-encoded in your browser using a Canvas + Wasm pipeline — it never uploads. No signup, no watermark.