Compress images online — free & private
Drop in an image, drag a quality slider, and download a smaller file. Everything happens in your browser — nothing is ever uploaded.
- No upload
- Sign in to download
- Free
What is image compressor?
Image compression reduces the file size of a photo while keeping it looking the same to the human eye. Lossy formats like JPG and WebP discard fine detail that is nearly invisible, which can shrink a photo by 60–90%. Lossless formats like PNG keep every pixel intact.
This tool re-encodes your image entirely on your device using the browser's built-in encoders. Your original photo is read into memory, compressed, and downloaded — it is never transmitted to a server, never stored, and never shared with anyone.
How to image compressor
- Drop or click to choose an image (PNG, JPG, or WebP).
- Drag the Quality slider and watch the file size drop.
- Pick an output format — WebP is usually the best balance of size and quality.
- Drag the divider to compare before and after, then click Download.
Frequently asked questions
Is this image compressor really free?
Yes. Single-image compression at standard quality is free forever, with no account and no watermark.
Are my images uploaded anywhere?
No. The entire compression runs in your browser. You can verify this by opening your browser's developer tools and checking the Network tab while compressing.
Which formats can I compress?
PNG, JPG, and WebP. For maximum savings we recommend re-encoding photos to WebP.
How much smaller will my image get?
Typical savings are 60–90% for photos. The exact result depends on the original format, resolution, and content.
Get the Free Photo Toolkit
Every image spec, size, and preset for Amazon, Etsy, Instagram, and passport photos -- one printable PDF.