How to use
- Pick an output format. WebP gives the best size for most photos; JPEG works everywhere.
- Set the quality (80 is a good start) and, if you like, a maximum size for the longest side.
- Drop images on the box, choose them, or paste with Ctrl+V / ⌘V.
- Download each image, or all of them at once as a ZIP file.
Which format should I use?
- WebP: 25–35% smaller than JPEG at the same quality. Supported by all current browsers.
- AVIF: often smaller still, but slower to create. Appears in the list only if your browser can make it.
- JPEG: the safest choice for email, older software and printing services.
- PNG: lossless. Use it for screenshots, diagrams and images that need transparency.
Common sizes
For a website, 1920 px on the longest side covers full-screen images on most displays. For email attachments and chat apps, 1280 px is usually plenty. Social networks resize uploads themselves, so 2048 px is a safe upper limit.
Frequently asked questions
Are my images uploaded?
No. Your browser decodes and re-encodes each image locally. You can disconnect from the internet after the page loads and it still works.
Is there a file size or count limit?
No fixed limit. Very large batches depend on your device’s memory.
Does it remove location data?
Yes. Re-encoding removes EXIF metadata such as GPS location, camera model and serial numbers. The image is rotated to the correct orientation first.
Why is a file sometimes kept as the original?
When the image is already well compressed and you keep the same format and size, re-encoding can make it larger. In that case the original file is kept.