- Private: files never leave your device
- Free, no sign-up
- Fast, works offline once loaded
How to use Image Compressor
- Drop your images into the box, or click to browse. You can add many at once.
- Choose the output format and move the quality slider. 70 to 80% is the sweet spot for photos.
- Compare the sizes, then download each file or all of them as a ZIP.
About this tool
Large images slow websites down, fill inboxes and cost storage. This image compressor makes JPG, PNG and WebP files much smaller while keeping them looking the same to the human eye.
For photos it re-encodes at the quality you choose, and for PNG graphics it reduces the number of colors with a smart palette, similar to TinyPNG. Switch the output to WebP for the smallest files of all. You can also set a maximum width, which is the fastest way to shrink phone photos.
Compression runs entirely in your browser, so there is no upload wait, no file limit and your pictures stay private.
Frequently asked questions
How do I compress an image without losing quality?
Use a quality of 70 to 85% for JPG or WebP. The savings are large and the difference is almost impossible to see. For PNG, keep the default color reduction or choose lossless.
How much can an image be compressed?
Photos often shrink 60 to 90 percent. Screenshots and graphics saved as PNG typically shrink 50 to 80 percent.
Which format is best for compression?
WebP gives the smallest files, followed by JPG for photos. PNG is best for graphics and transparency.
Can I compress many images at once?
Yes. Add as many as you like and download them together as a ZIP.
Is Image Compressor really free?
Yes. You can use Image Compressor as often as you like with no sign-up, no watermark and no daily limit.
Are my images uploaded to a server?
No. Image Compressor runs entirely in your web browser, so your files stay on your own device and are never sent to DEWANARO or anyone else.