How to use the image compressor
- 1Press Choose images, drag files in or paste one with Ctrl+V.
- 2Move the Quality (JPG and WebP) slider; lower means smaller files. Each image is recompressed as you change it.
- 3Optionally pick an Output format (WebP is usually smallest) or a Max width to shrink large photos.
- 4Compare with Preview, then press Download or Download all (ZIP).
Choosing the quality level
The quality slider controls how much detail JPG and WebP keep. As a starting point:
| Quality | Typical use |
|---|---|
| 85–92 | Photos where detail matters: portfolios, products |
| 75–85 | Most website and email images |
| 60–75 | Thumbnails and images shown small |
| Below 60 | Only when size matters more than looks |
The file size falls quickly from 100 down to about 80, then more slowly, while visible damage rises the further you go. Check faces, skies and sharp edges in Preview before settling on a value. The setting applies to every image in the list, and each one updates when you move the slider.
JPG, PNG or WebP output
Same as original keeps each file's format, which is safest when the images go back where they came from. JPG suits photos and is accepted everywhere; transparent areas are filled with a color you choose. WebP is usually smaller than JPG at similar quality and keeps transparency; every current browser displays it, but some older programs can't open it. PNG is lossless: use it for screenshots, logos and graphics with sharp edges, and choose Reduce colors for real savings.
If your browser can't save WebP, the tool says so and saves JPG or PNG instead.
Compressing several images
Add as many images as you like; they are processed one after another so the page stays responsive, and Stop halts the queue. Each row shows the old and new size, the saving in percent and the dimensions. Download all (ZIP) packs the results into one file; duplicate names get a number added. Change any setting and the whole list is recompressed with the new values.
Compressing to an exact file size
This page compresses by quality, so the size you get depends on the image. If a form or website gives a limit such as 50 KB or 200 KB, use reduce image size in KB instead: you type the limit and it finds the best quality, and dimensions if needed, that fit.
Why some images barely shrink
- Already compressed. Photos from websites and messaging apps have usually been compressed once; there is little left to remove, and recompressing costs quality.
- PNG photos. PNG is lossless, so a photo saved as PNG stays large. Convert it to JPG or WebP, or use Reduce colors.
- Same quality as before. Saving a JPG at a higher quality than it was made with can make it bigger. When a result is larger than the original in the same format, the tool keeps your original file and says so.
Are my files uploaded?
This tool runs entirely in your browser. Your files are not uploaded to our servers.