Image Compressor Online — Up to 80% Smaller
Compress PNG, JPEG, and WebP without visible quality loss. PNGs are automatically converted to WebP — preserving full transparency while shrinking file sizes by up to 80%. 100% local, no upload, no signup, no tracking.
Drop image here
or click to select (PNG / JPEG / WebP)
Max 20MB · No upload · 100% local
Frequently Asked Questions
Is this image compressor really free?
Yes. No signup, no payment, no catch. ToolKit is supported by non-intrusive ads.
Do you upload my images?
No. All compression happens entirely in your browser using the Canvas API. Your files never leave your device.
What image formats are supported?
PNG, JPEG, and WebP. For PNG we automatically convert to WebP (keeping full transparency) to achieve 60–80% smaller file sizes.
Will compression reduce image quality?
Quality loss is kept imperceptible to the human eye. Choose Low (near-lossless), Medium (default), or High (maximum compression). If the browser cannot produce a smaller file, the tool returns your original image untouched.
Why not just use a regular PNG compressor?
Browser-based PNG re-encoding is often larger than the original because PNG is already lossless. Converting PNG to WebP is the only client-side way to substantially reduce PNG file size while preserving alpha transparency — typically 60–80% smaller.
How do I make images smaller for my website?
Upload your PNG/JPEG/WebP, pick Medium or High compression, and download the result. Use WebP output on your site for the fastest loading. Everything runs locally — no file is uploaded anywhere.
Does it work on mobile?
Yes. The tool works on iOS Safari, Android Chrome, and all modern mobile browsers.