Image Compressor
Compress images as JPEG, WebP, or PNG, optionally resize them, and compare dimensions and file sizes before downloading.
100% Client-Side
No Uploads
Instant Compression
Drop an image here
or click to browse (PNG, JPEG, WebP)
How to Use the Image Compressor
1
Select Image
Drop a PNG, JPEG, or WebP image into the upload dropzone.
2
Adjust Quality
Choose an output format, set optional maximum dimensions, and use a preset or the slider to adjust quality.
3
Download File
Compare the dimensions and file sizes, then download your compressed image.
Frequently Asked Questions
How does client-side image compression work?
Image compression is rendered using HTML5 Canvas APIs. The image is drawn onto an offscreen canvas element and exported with custom lossy or lossless compression levels.
Are my pictures uploaded to a cloud server?
No. The canvas processing happens entirely in your local browser memory. No network uploads take place.
Which image formats are supported?
Cipher Image Compressor supports standard web formats including JPEG, PNG, and WebP.