Free Image Compressor
Compress PNG, JPG, and WEBP images without losing visual quality.
- 100% free
- Files stay on your device
- No sign-up, no watermark
Choose files or drag & drop
Upload PNG, JPG, JPEG, WEBP files to convert locally inside your browser.
What is Image Compressor?
Fast website load times and email attachment limits require lightweight images. Our client-side image compressor balances perceptual image quality against byte size using adaptive chroma subsampling and quantization algorithms.
How to use Image Compressor
- 1
Add your file or input
Choose a supported file, drag it onto the upload area, or type/paste the data this tool works with.
- 2
Adjust the options
Pick the output format, quality, size or other settings the tool offers. Defaults work well for most files.
- 3
Process and download
Run the tool and save the result. Processing happens in your browser, so nothing is uploaded to a server.
Frequently asked questions
How does image compression work without degrading visual quality?
The compressor removes imperceptible high-frequency color variations and applies perceptual quantization, preserving edges and luminance where the human eye is most sensitive while drastically reducing byte count.
Are my private photos uploaded to a third-party server during compression?
No. All quantization, resizing, and encoding occur strictly within your browser’s volatile memory. Files are never transmitted across the network.
Can I see the exact before and after file sizes before downloading?
Yes. The compressor calculates and displays the exact byte count of both the input and the compressed output blob, giving you transparent percentage savings.
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