Image Compressor

Frequently asked questions

Does my image get uploaded to a server?

No. Compression uses the browser's Canvas API and runs entirely on your device. Your images are never uploaded, stored, or transmitted anywhere.

What image formats can I use?

You can upload JPEG, PNG, WebP, and GIF files. Output can be saved as JPEG, WebP, or PNG.

What is the difference between JPEG and WebP output?

WebP is a modern format that typically produces smaller files than JPEG at equivalent visual quality, and also supports transparency. All modern browsers and operating systems support it. Use JPEG for maximum compatibility with older software.

Why does PNG output sometimes produce a larger file?

PNG is lossless, so the quality slider has no effect on PNG output — every pixel is preserved exactly. If reducing file size is your goal, use JPEG or WebP instead.

Does compression change the image dimensions?

No. This tool only adjusts compression quality. The output image has exactly the same width and height as the original.