Free Image Compressor
Shrink JPG, PNG and WebP files in your browser. Quality slider, batch mode, side-by-side size comparison. Output keeps the same format you put in.
Drop JPG, PNG or WebP files here
…or click to choose from your device
Files stay in your browser — nothing is uploaded.
Higher quality = larger file. 85–92% is usually invisible to the eye.
Drop image files in to get started.
Your file never leaves your computer
This tool runs entirely in your browser. There is no upload endpoint on this page — the PDF library does all of the work locally on your device, the result file is generated in memory, and the download starts from your own machine. Open your browser's network panel and verify: nothing is sent.
FAQ
Image Compressor questions, answered
How much smaller can you get my images?
A typical 4 MB JPG photo drops to 400–800 KB at 75–85% quality with no visible change. WebP shrinks even more aggressively. PNG savings are minimal because PNG is lossless — see the PNG question below.
Why does the same quality setting give different output sizes?
JPG and WebP encoders look at how complex each part of the image is. A photo with lots of fine detail (foliage, fabric texture) compresses less efficiently than a flat illustration. The quality setting is a target; the actual size depends on what you fed in.
Why does PNG compression barely shrink my files?
PNG is a lossless format — by design it preserves every pixel exactly. The browser's Canvas API can't do lossy PNG compression. For meaningful PNG size reductions (50%+), use a desktop tool like ImageOptim or pngquant. For most use cases the better answer is converting PNG → JPG or → WebP, which we have dedicated tools for.
Is anything sent to a server?
No. The Canvas API re-encodes locally. DevTools → Network will confirm — your images never leave the page.
What quality should I use?
Start at 80%. Compare before/after using the file-list size pills. Drop to 70% if you need smaller files; only go below 60% if quality genuinely doesn't matter (thumbnails, previews). Above 90% the savings shrink dramatically.
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