Compress images
Reduce the size of many images at once with no visible quality loss.
Your files are not uploaded anywhere: everything happens on your device.
How it works
- Choose or drop your files.
- Adjust the options if you like.
- Click the button and download the result.
💡 WebP usually gives the smallest files and works on all modern sites and phones.
Questions
Are my files uploaded anywhere?
No. bTooler processes files in your browser. Nothing is sent to any server. You can check by going offline after the page loads.
How much does it cost?
Nothing. There is no paid plan, no limits, no watermarks and no sign-up.
Is there a file size limit?
No artificial limit. Only your device's memory; very large files (hundreds of MB) work best on a computer.