Convert images

Convert changes an image from one format to another in your browser, writing PNG, JPEG, WebP, AVIF, GIF, BMP, ICO, ICNS, QOI, TGA, PPM, PGM or PBM. It reads all of those plus SVG, TIFF and PDF, so a scan or a vector file can come out as a raster image; HEIC opens in Safari only, because no other browser decodes it. The quality slider appears only for the lossy formats — JPEG, WebP and AVIF — because the rest are written exactly.

How it works

  1. Add your images Drop files onto the page or click to pick them. Several at once is fine — each gets its own row in the queue with its size and dimensions.
  2. Pick the target format Choose from the thirteen writable formats. Any format this browser cannot encode is shown disabled, with the reason on hover, rather than failing later.
  3. Set quality or a background For JPEG, WebP and AVIF, drag quality between 0.05 and 1.00 (it starts at 0.82). For formats with no alpha channel, pick the color that transparent areas will be filled with.
  4. Adjust the filename pattern The filename field takes the tokens {name}, {width}, {height}, {ext} and {index}, so a batch can be named by its output size.
  5. Process and download Press the process button, then download. A single file saves directly; several arrive as one zip.

Questions

Are my images uploaded to a server?
No. Decoding, conversion and encoding all happen in Web Workers inside your own browser tab. The file never leaves your machine, there is no account, and the tool keeps working offline after the first load.
Why is AVIF disabled in my browser?
AVIF encoding needs a Chromium browser — Chrome, Edge, Brave or Arc. Firefox and Safari can display AVIF but cannot write it, so file4edit probes the browser and greys the option out with that explanation instead of failing at the end of a batch.
What happens to transparency when I convert a PNG to JPEG?
JPEG has no alpha channel, so transparent areas are filled with a background color you choose. file4edit shows that notice before you convert, not after, and the same applies to BMP, PPM, PGM and PBM.

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