Image Compressor — Free, Browser-Only, No Upload
Same photo. A fraction of the size.
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Runs entirely in your browser. Your files never upload to a server.
What it does
Most compressors upload your photo, cap the free size, or stamp a watermark. Ours runs entirely in your browser via Canvas — drop an image, drag the quality, and the file size updates live with a 'saved 78%' readout. Or set a target (100 KB, 200 KB, 500 KB, 1 MB) and it binary-searches the highest quality that still fits. WebP output gets the smallest files; JPG when you need universal support. For getting a 6 MB phone photo under an email limit, hitting a CMS upload cap, or trimming page weight for Core Web Vitals. To change the pixel dimensions instead of just the bytes, use the Resizer; to make an image bigger with real detail, use the AI Upscaler.
How it works
Drop your image
JPG, PNG, or WebP. The browser reads its byte size and decodes it locally — nothing is uploaded.
Pick quality + format
WebP for the smallest file, JPG for the widest support. Drag the quality slider and watch the size update live, or hit a target like 200 KB and we find the quality for you.
Download the smaller file
Same pixel dimensions, a fraction of the bytes. The before/after readout shows exactly how much you saved.
Image Compressor — FAQ
Do my images get uploaded?
No. Compression happens in your browser via Canvas — the image bytes never leave your device. Nothing is stored or logged.
How is this different from the Resizer?
The Resizer changes the pixel dimensions (e.g. 4000px → 1200px wide). The Compressor keeps the same dimensions and shrinks the file size by re-encoding at a lower quality or a more efficient format. Use both together for the smallest possible web image.
WebP or JPG — which should I pick?
WebP gives roughly 25–35% smaller files than JPG at the same visual quality and is supported by every current browser. Pick JPG only if the destination is an old system that can't read WebP.
What does 'compress to target' do?
You pick a ceiling (say 200 KB) and we binary-search the highest quality whose output still fits under it — handy for email attachment caps or upload limits that reject anything bigger.
Will it blur my image?
Compression trades some fine detail for size — at high quality (80–90) the loss is invisible; push it low and you'll see artifacts. The live preview shows exactly what you'll get before you download.
Why no PNG output?
PNG is lossless, so re-saving it doesn't shrink much. To make a PNG smaller, convert it to WebP here — same look, far fewer bytes (especially for photos).
More free tools
Try Image Compressor
Free to start. No signup for the first run. 100% private — runs in your browser, your files never upload.
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