Image Compressor
Reduce image file size while maintaining visual quality.
How to Use Image Compressor
- 1Drag and drop your images onto the upload area, or click to browse your files.
- 2You can add multiple images at once — the compressor handles them all in one go.
- 3Adjust the Quality slider to balance between file size reduction and visual quality.
- 4Set the Max Width/Height value if you also want to downscale large images.
- 5Click 'Compress Images' and download each compressed file individually.
Frequently Asked Questions
How much will my images be compressed?
The reduction depends on the source image and the quality setting you choose. JPEG and WEBP images typically see 40–80% file size reductions at quality settings of 70–80%. PNG files with high detail may see smaller reductions since they are already losslessly compressed.
What quality setting should I use?
For web use, 75–85% quality is generally indistinguishable from the original to the human eye while achieving significant file size savings. For print, use 90%+. For thumbnails or previews, 60–70% is usually sufficient.
Does compression affect image dimensions?
Only if you set the 'Max Width/Height' value to a number smaller than your image's dimensions. By default this is set to 1920px, which leaves most images untouched. Set it to 8000px to guarantee no resizing occurs.
Which image formats are supported?
JPEG, PNG, WEBP, and GIF images are all supported. The output format matches the input format. For the smallest file sizes, consider converting to WEBP using our Image Converter after compression.
Are my photos uploaded to a server?
No. All compression runs locally in your browser using the browser-image-compression library and Web Workers. Your images are never sent over the internet. This is especially important for personal photos and confidential documents.
About Image Compressor
The Image Compressor is a powerful, privacy-first tool for reducing the file size of your photos and graphics without visible quality loss. Optimized images load faster in web browsers, use less storage space, and are quicker to share via email or messaging apps — making compression one of the most commonly needed image operations for web developers, bloggers, and everyday users alike.
Our compressor uses the browser-image-compression library, which leverages Web Workers to process images in a background thread, keeping the interface responsive even while compressing large batches. The compression algorithm adjusts quantization tables for JPEG files and applies smart filtering for PNG and WEBP, targeting the specified quality level while minimizing visible artifacts.
A quality setting of 80% is the sweet spot for most web use cases — you'll typically see 50–70% file size reductions that are imperceptible to the human eye at normal viewing distances. If you need even smaller files for slow connections or bandwidth-limited environments, lower the quality to 60–70%. For archival or professional photography, keep it at 90%+.
The Max Width/Height setting adds an extra optimization layer. Images wider or taller than the specified pixel value will be scaled down proportionally before compression. This is especially useful when dealing with high-resolution photos from modern smartphones (often 12–200 megapixels) that are far larger than any web display requires. The default value of 1920px matches the width of a Full HD monitor.