Choosing a format
| Format | Best for | Transparency | Lossless |
|---|---|---|---|
| JPG | Photographs, anywhere size matters | No | No |
| PNG | Logos, screenshots, editing masters | Yes | Yes |
| WebP | Images served on the modern web | Yes | Either mode |
The longer version, with file-size comparisons, is in image formats compared.
Direct converters
If you already know both ends of the conversion, these skip the picker:
- PNG to JPG — Shrink screenshots and graphics for sharing
- JPG to PNG — Lossless copy for editing
- PNG to WebP — Smaller files, transparency kept
- JPG to WebP — Modern format for the web
- WebP to PNG — Open WebP in older software
- WebP to JPG — Maximum compatibility
- HEIC to JPG — iPhone photos anything can open
- HEIC to PNG — iPhone photos, lossless
- SVG to PNG — Rasterise vectors at any size
- JPEG to JPG — The same format, renamed properly
Frequently Asked Questions
How do I change an image format?
Pick the format you want on the right, drop your files in, and the converted versions download straight back. There is no upload step and no account. If you already know both ends of the conversion, the dedicated pages below skip the format picker entirely.
Which image format should I choose?
JPG for photographs where file size matters and transparency does not. PNG when you need lossless quality or a transparent background, accepting larger files. WebP when the destination is a modern browser and you want the smallest file that still supports transparency.
Does converting an image lose quality?
It depends on the direction. Converting to PNG is lossless, so nothing degrades. Converting to JPG or WebP re-encodes the image and discards some detail, which the quality slider controls. Repeatedly re-saving the same file as JPG compounds that loss, so convert from the original whenever you can.
Are my images uploaded to a server?
No. Decoding and encoding run in a Web Worker on your own device using WebAssembly builds of the standard image libraries. Nothing is transmitted, which you can verify in your browser Network tab while a conversion runs.
Can I convert several images at once?
Yes, up to 20 files per batch, all to the same target format. Each one is listed with its before and after size as it completes.
Related tools
- Image resizer — change dimensions rather than format.
- Image compressor — keep the format, cut the bytes.
- How to reduce image file size — which of the three to reach for.