Compress images without uploading them anywhere
Most online image compressors send your photos to a server you don't control. This one doesn't. Every image you add is read and re-encoded directly inside your browser using the Canvas API, then handed back to you as a download. Nothing is transmitted, logged, or stored - close the tab and it's gone.
How to compress an image in your browser
- Drop one or more images onto the box above (or click to pick files).
- Choose an output format - WebP usually gives the smallest file at the same quality, JPG is the safest for sharing, and PNG keeps transparency.
- Set a quality level. 75-85% is the sweet spot for photos - visually identical, far smaller.
- Optionally cap the width or height to shrink large photos before compressing.
- Click Compress images, then download each result or all at once.
JPG vs WebP vs PNG - which should I pick?
WebP typically saves 25-35% over JPG at the same visual quality and is supported by every modern browser. Use JPG when you need maximum compatibility (email, older apps). Use PNG only when you need a transparent background or pixel-perfect graphics, since it's lossless and larger.
FAQ
Does this Image Compressor upload files to a server?
- No. All processing happens locally in your browser. Your files never leave your device.
Is there a file size or count limit?
- No artificial limit - the only constraint is your device's memory. Very large batches are processed one image at a time.
Does it work offline?
- Once the page is loaded it runs without a connection, because the work is done on your machine.
Will compressing reduce quality?
- Lossy formats (JPG/WebP) trade a little quality for much smaller files. At 80% the difference is usually invisible. PNG is lossless.