JPG to PNG Converter
Convert JPG / JPEG images to lossless PNG format entirely in your browser. No uploads.
Why Convert JPG to PNG?
PNG uses lossless compression — every save is exact, with no artefacts and no quality decay. PNG also supports a full alpha-channel transparency layer, making it the go-to format for logos, icons and graphics that need to sit on coloured backgrounds. JPG is great for photos; PNG is better for anything that needs further editing or transparency.
The most common reasons to convert JPG to PNG:
- Further editing without quality loss — When you plan to edit an image multiple times in a photo editor, saving as PNG after each edit preserves every pixel. Each save-as-JPG re-compresses the image and accumulates visible artefacts over time.
- Preparing a graphic for a transparent background — JPG cannot store transparency. Converting to PNG is the first step before using a background-removal tool, because PNG's alpha channel carries per-pixel opacity information.
- Screenshots and UI design assets — Screenshot files contain text, flat colors, and sharp edges. JPG compression handles these poorly and creates blurry edges and "ringing" artefacts around text. PNG renders them perfectly.
- Source files for web graphics — Buttons, icons, illustrations and other UI elements that will be reused or resized should always be stored as PNG so they can be scaled and exported repeatedly without degradation.
JPG vs PNG — Key Differences
| Feature | JPG | PNG |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency | No | Yes (alpha channel) |
| File size | Smaller | Larger |
| Best for | Photos | Graphics, logos, screenshots |
| Re-save quality loss | Yes | No |
| Browser support | Universal | Universal |
| Color depth | 8-bit per channel | Up to 16-bit per channel |
What Happens to Quality When You Convert?
When you convert a JPG to PNG, the tool reads the current pixel values from the JPG and encodes them losslessly in PNG format. The conversion does not recover any detail that was lost when the JPG was originally compressed — that information is permanently gone. What you get is a pixel-perfect copy of the JPG, stored without further loss.
This means:
- If the JPG was high quality (low compression), the PNG will look identical and excellent.
- If the JPG already had visible compression artefacts, those artefacts are preserved — they are now part of the pixel data.
- All future saves of the PNG file will be lossless — the quality will not degrade further.
The practical benefit is stopping the degradation cycle: once you are working in PNG, you can edit and save as many times as you like without any further quality loss.
PNG File Size: What to Expect
PNG files are always larger than equivalent JPGs for photographic content, because PNG stores every pixel exactly without the compression tradeoffs JPG uses. Typical size differences:
- A 500 KB JPG photo will typically become a 1.5–3 MB PNG.
- A 100 KB JPG screenshot will typically become a 150–300 KB PNG (screenshots have repetitive areas that PNG compresses well).
- A 50 KB JPG icon will become a 60–120 KB PNG.
If file size is a concern after converting, use an image optimiser to compress the PNG. PNG to JPG is also always an option if transparency is not needed and you want to reclaim file size.
Need to go the other way? Use our PNG to JPG Converter to get a smaller, web-ready file.