How to compress an image
- Drop an image on the box or choose one: JPG, PNG or WebP. You can also paste a screenshot.
- It’s compressed right away. Move the quality slider to balance file size and sharpness.
- Switch between Compressed and Original to compare, then download the result.
How the compression works
JPG and WebP are lossy formats: a lower quality discards detail that the eye barely notices. A quality between 70 and 80 usually looks the same on screen and can cut the size by more than half. WebP is typically 25–35% smaller than JPG at similar quality.
PNG is lossless, so browsers can’t lower its quality. To shrink a PNG, convert it to WebP, which keeps transparency, or to JPG. That’s why PNG images are converted to WebP by default; you can switch back to PNG in the format menu.
Transparency, metadata and orientation
- JPG doesn’t support transparency: transparent areas become white. WebP and PNG keep it.
- Metadata such as the camera model, date and GPS location is removed from the result, which is good for privacy.
- The photo’s orientation is applied to the pixels, so it keeps looking the right way up.
- The width and height stay the same. To make an image smaller in pixels, you need to resize it.
Your images never leave your device
The image is compressed by your browser, on your device. It isn’t uploaded to our servers and nothing is stored: when you close the page, it’s gone.
Frequently asked questions
Is there a file size limit?
We don’t set one. The limit is your device’s memory: very large photos (tens of megapixels) can fail in phone browsers, while computers handle them fine.
Which quality should I choose?
For websites, email and messaging, 70–80 is a good balance. For printing or images you’ll edit again, use 85 or more. Compare with the original before downloading.
Why is the compressed file larger than the original?
The image was probably already well optimized, or you re-saved a PNG as PNG. Try a lower quality, or choose WebP or JPG.
Does compressing change the image dimensions?
No. The result has the same width and height in pixels; only the file size changes.
Can I compress HEIC photos from an iPhone?
Only in browsers that can open HEIC, such as Safari. Other browsers can’t read the format, so convert it to JPG first.