About minlify

Images are the heaviest thing on most web pages, and the tools for fixing that tend to be either a desktop app you have to install or a site that wants an account before it will do anything. minlify is the short version: drop a file in, get a smaller one back.

How it works

Conversion runs on our servers using libvips, the same imaging library behind a good deal of the web's image processing. That matters for two reasons: it is fast enough that a 4000×3000 photograph turns into WebP in about a second, and it does not depend on how fast your own machine is.

Quality is picked per image rather than set once for the batch. A 12-megapixel photograph and a 300-pixel icon need very different settings, and asking you to guess a number between 1 and 100 is asking the wrong question. You can still override it.

What happens to your files

They are held in memory for as long as the conversion takes and then discarded. Nothing is written to disk. Nothing is written to a database. We keep the source format, the target format, the byte counts, and how many milliseconds it took — the numbers that tell us whether the service is healthy, and nothing that identifies you or your picture.

Metadata inside the image, including any GPS coordinates your camera wrote, is stripped by default. If you need it kept, that is an option rather than the default.