What this tool does
- JPEG, PNG and WebP in both directions: the three formats every browser can read and write.
- WebP often weighs half as much as JPEG at equal quality; a few older programs will not open it, and we say so.
- The loss of transparency is announced beforehand: converting a cut-out PNG to JPEG fills the background with white, never black, and you know it before you click.
- The quality slider disappears for PNG, which is lossless.
- A browser that cannot write a format says so.
What it does not do: We convert what the browser can decode (JPEG, PNG, WebP, GIF, BMP and, depending on the browser, AVIF) plus iPhone HEIC files and camera RAW files, which are converted as soon as they are dropped in (see the two dedicated tools, which say what each one costs). An animated GIF is converted on its first frame only: the animation is lost, and the screen says so.
Nothing is uploaded. Cut your network connection once this page has loaded: the tool keeps working. How to check it yourself.
The other tools
- Merge PDFs: Several files, one document, in the order you decide.
- Organize pages: Reorder, rotate, delete, duplicate: the whole plan.
- Extract pages: Pick pages, take them out into a document of their own.
- Delete pages: Remove pages while looking at them; they are not left under the file you get.