How to compress an image
- Drop one or more images into the box, or click it to choose files.
- Move the quality slider. Around 70 to 80 percent is a good starting point for photos.
- Check the new size next to each file, then press Download.
What actually changes
JPG and WebP are lossy formats. When you lower the quality, the image keeps its look but discards fine detail that most eyes will not notice, and that is where the savings come from. Reducing the pixel dimensions saves even more, which is useful when a photo straight from a phone is far larger than the screen it will be shown on.
PNG is different. It stores every pixel exactly, so the quality slider does not shrink a PNG. If a PNG is a photograph, saving it as WebP or JPG will usually make it much smaller. If it is a logo or a screenshot with sharp edges and transparency, keep it as PNG and use the resize option instead.
Good to know
- Everything happens inside your browser. The files are never sent to a server.
- If a file would come out larger than the original, the tool keeps your original and tells you so.
- Saving a transparent image as JPG fills the transparent areas with white, because JPG has no transparency.
- Very large images can take a few seconds on an older phone.
Questions people ask
Are my images uploaded anywhere?
No. The compression runs in your browser using your own device. The images are not sent to our servers or to anyone else.
Why did my PNG not get smaller?
PNG is a lossless format, so lowering the quality setting does not change it much. Try saving it as WebP or JPG if it is a photograph, or reduce its pixel width.
What quality setting should I use?
For most photos, 70 to 80 percent looks the same to the eye and cuts the size a lot. Go higher for images you plan to print or edit further.
Is there a limit on file size or how many files?
We do not set a limit. The practical limit is your device's memory, so very large images or very long lists may be slow on a phone.
Does it remove location data from photos?
Re-saving an image through this tool normally drops the hidden camera information, including location, from the new file. Check the result yourself if privacy matters for a particular image.