Move between JPG, PNG and WebP — to open a format something refuses, or to switch to one that keeps transparency.

When you need this

Format conversion usually becomes necessary the moment something refuses to open. You saved an image from the web and it came down as WebP or AVIF that your photo viewer will not display. A form only accepts JPG. Or you need a transparent background and what you have is a JPG.

Formats differ in what they are able to carry. PNG and WebP can hold transparency; JPG cannot. Converting an image with transparent areas to JPG fills those areas with white, and that cannot be undone afterwards. You are warned on screen before that particular conversion runs.

On size, WebP is usually smallest, JPG next, PNG largest. Logos and diagrams with only a handful of colours can invert that ranking — PNG was designed for exactly that kind of picture.

How to use it

1. Add your images.
2. Pick the format you want.
3. For JPG and WebP you can set the quality too.

Your files are never uploaded

Everything runs inside your browser. Because the image never reaches a server, we cannot store it or look at it. That difference matters when the file is company material or a personal photo.

Frequently asked questions

Which format should I pick?

For photographs JPG is smallest. Pick PNG when you need transparency, and WebP when you want a bit of both.

Does it handle iPhone HEIC files?

No — Chrome and Firefox cannot decode HEIC. On the iPhone, set Camera → Formats → Most Compatible and photos will save as JPG.

What happens to transparency when I convert PNG to JPG?

JPG cannot hold it, so the transparent areas turn white. Stay on PNG or WebP if you need it.

Is it free?

Yes. No account, no payment, no usage limit.

Are my files uploaded?

No. Everything happens inside your browser. A page that is already open keeps working even if you go offline.

How many images at once?

There is no count limit. Speed depends on your own device, because your computer does the work rather than a server.