The short answer
Why use Compress Image?
Upload forms often reject a 5 MB phone photo but accept the same picture at 400 KB. Here the status line tells you the percentage saved right after you apply, so you are not exporting from an editor again and again to get under a limit.
The Quality slider runs from 10% to 95% and starts at 78%. Output format offers JPEG, PNG, WebP and AVIF, with WebP selected. After you tap Apply changes, the status line shows the percentage saved and the old and new sizes, for example 3.2 MB to 610 KB. Quality only applies to JPEG, WebP and AVIF. PNG is saved losslessly through OxiPNG, so the slider does nothing for it.
JPEG has no transparency, so choosing it fills see-through areas with white. If AVIF encoding fails in your browser, the file is saved as WebP and the status line says so. Saving a new file also leaves out camera data such as EXIF, which means the GPS tags in a phone photo are not copied into the compressed version.
Compress Image never touches the pixel size. When a form sets both a file size limit and a maximum width, use Resize Image first to set the dimensions, then compress. If you only need a different format and do not care about tuning quality, Image Converter does that at a fixed 90%.
Where Compress Image fits
Email attachments
Shrink a batch of holiday photos one by one so they fit under a 25 MB email attachment cap.
Faster web pages
Turn a 4 MB hero photo into a WebP of a few hundred kilobytes before uploading it to your site.
Strip location data
Save a phone photo again so its GPS tags are not carried into the copy you post publicly.
Start to finish
How to use Compress Image
- 01Tap Choose image, or use Paste from clipboard for a screenshot you just copied.
- 02Pick WebP, JPEG, AVIF or PNG in Output format, then set Quality; it opens at 78%.
- 03Tap Apply changes, read the percentage saved in the status line, then tap Download result.
What to expect from Compress Image
| Check | What it means here |
|---|---|
| Supported input | JPEG, PNG, WebP, GIF, BMP, SVG and browser-supported AVIF images |
| Main controls | Dimensions, quality, or output format, depending on the tool |
| Output | JPEG, PNG, WebP, or AVIF where your browser can encode it |
| Working limit | 50 MB and 50 megapixels per image |
Compress Image tips
- If the status line says the file got larger, drop Quality by 10 or switch from PNG to WebP.
- PNG ignores the Quality slider, so use it only for screenshots and graphics with flat color.
- For a 1 MB form limit, start at 78% WebP and step down until the saved size fits.
- JPEG output paints transparent areas white, so keep logos with see-through backgrounds as WebP or PNG.
Compress Image FAQ
Something missing? Ask us.
What quality setting should I use?
Why did my compressed file get bigger?
Does Compress Image change the pixel dimensions?
Does Compress Image upload my file?
Is Compress Image free to use?
Why did Compress Image fail or look wrong?
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