Which format for what
- JPG — photos you share, print or upload anywhere. Small files, opens everywhere, no transparency.
- PNG — screenshots, logos, graphics with text, anything with a transparent background. Lossless, so it's big for photos.
- WebP — images for websites. Noticeably smaller than JPG at similar quality and supports transparency. Every current browser shows it, but some older programs and upload forms still refuse it.
- AVIF — smaller still, but encoding support is limited and many apps can't open it yet.
- GIF — the old format for simple animations, limited to 256 colours.
| Format | Transparency | Size for a photo | Opens in | Good for |
|---|---|---|---|---|
| JPG | No | Small | Everything | Photos |
| PNG | Yes | Large (lossless) | Everything | Graphics, screenshots, logos |
| WebP | Yes | Smaller than JPG | All modern browsers, most apps | Websites |
| AVIF | Yes | Smallest | Modern browsers, fewer apps | Websites, where supported |
| GIF | On/off only | Large, 256 colours | Everything | Simple animation |
What this converter can produce
You can convert to JPG, PNG, WebP and AVIF. Encoding is done by your browser, so the available options depend on it:
- JPG and PNG work in every browser.
- WebP works in Chrome, Edge and Firefox. In some browsers, Safari in particular, the option is greyed out because the browser can't write WebP.
- AVIF most browsers can display but not create, so the option is usually disabled and marked as not supported. The converter never hands you a PNG renamed to
.avif— if the browser can't produce the real format, it says so.
As input, anything your browser can open works: JPG, PNG, WebP, GIF, BMP, SVG, ICO and AVIF. An animated GIF converts as its first frame. SVG is rendered at 2048 px on its longest side. For iPhone photos in HEIC, use the dedicated HEIC to JPG converter.
Transparency
JPG has no transparency. When you convert a PNG logo or a cut-out to JPG, transparent areas become white (not black, as some converters produce). PNG, WebP and AVIF keep transparency as it is.
If you need a transparent background in the first place, make it with Remove Background and save as PNG or WebP.
Quality and repeated conversions
JPG, WebP and AVIF are lossy; the converter saves them at 92% quality, which keeps photos visually clean. Each lossy re-save throws away a little more, so convert from the best original you have, not from a copy of a copy.
Converting JPG to PNG does not bring back lost quality — it only makes the file several times bigger. Do it only when an editor or a form specifically requires PNG. Going the other way, a photo saved as PNG usually shrinks a lot as JPG or WebP.
There is no quality slider here. If the file must fit a limit, convert first and then use Compress Image.
Batch conversion
Select several files at once: they are all converted to the same format and downloaded as one ZIP. Files with the same name get a number added instead of overwriting each other. Changing the target format re-runs the whole batch.
Limits worth knowing
- Images above about 16.7 megapixels are reduced to that size (the canvas limit of Safari on iPhone, applied everywhere); a note tells you when this happens.
- EXIF metadata — camera, date, GPS — is not carried over. To strip it on purpose without converting, use Remove Metadata.
- Everything happens in your browser; files are never uploaded.
For a single common pair, the direct pages are quicker: PNG to JPG, JPG to PNG, WebP to JPG, JPG to WebP, AVIF to JPG.