Image tools that run in your browser.

Nothing is uploaded

Most image tools on the web work by sending your file to a server, doing the job there and sending it back. That means your picture sits on somebody else's disk for as long as they choose to keep it, and you have to trust a privacy policy about what happens next.

These tools do the work in the browser you already have open. Modern browsers can decode an image, redraw it and encode it again on their own, so there is no reason to send anything anywhere. Your file is read from the disk, worked on in memory and written back out. It never crosses the network, there is no account to make, and there is nothing for anyone to delete afterwards because nothing was ever stored.

Two practical things follow from that. There is no file size limit and no daily quota, because there is no server bill to keep down: a folder of two hundred photographs is only a question of how long your own machine takes. And it keeps working with the network off, since after the page has loaded nothing more is fetched.

Which tool do you need?

Crop when the problem is framing: there is something in the picture you want and something you do not. It is the only one of the four that works on a single image at a time, because every picture needs its own frame.

Convert when the format is wrong for where the file is going. A PNG screenshot that needs to be a JPEG for an upload form, or a folder of photographs that should be WebP before they go on a web page.

Resize when the picture has more pixels than it needs. This is usually the biggest saving available: a photograph straight off a phone can be several thousand pixels wide, and scaling it to the size it will actually be shown at cuts far more from the file than any quality setting can.

Compress when the dimensions are already right and the file is still too heavy. It re-encodes the picture at a lower quality without changing its width or height, and can work towards a file size you name.

Resize and compress overlap, and the order matters. If a photograph is both too large and too heavy, resize it first: the resize tool changes the format and the quality in the same pass, so it usually does the whole job on its own.

Formats, briefly

WebP is the default worth reaching for on the web. It is smaller than both PNG and JPEG at a matching quality and it keeps transparency, so it replaces both. JPEG is for photographs going somewhere that cannot read WebP, and it cannot hold transparency. PNG is lossless, which makes it right for logos, screenshots and diagrams and wrong for photographs, where it produces very large files.

AVIF is smaller again, and every current browser can open one, but none of them can write one. You can bring AVIF files in and convert them to something else; you cannot save as AVIF here, or anywhere else that works in a browser.