Image Compressor — Free Online Tool
Compress JPG, PNG & WebP up to 90% smaller — no quality loss. · No signup · Works on mobile
100% private: your files are processed in your browser. Nothing is uploaded to our servers.
How to use the image compressor
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Drag & drop your image (or click to browse) — JPG, PNG, or WebP.
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Adjust the quality slider and optional max-dimension limit; the live preview shows the result and new file size.
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Click Download — your compressed image saves instantly, never having left your device.
What does this tool do?
This free image compressor reduces JPG, PNG, and WebP file sizes by up to 90% directly in your browser — no upload to servers, no visible quality loss, and no file size limit. Drop an image, adjust the quality slider, compare before/after sizes, and download the compressed result instantly.
How does the image compressor work?
Compression happens on your device using the Canvas API: the image is decoded, optionally scaled to a maximum dimension, and re-encoded with your chosen quality factor. JPEG and WebP use perceptual lossy encoding that discards detail your eye barely notices — quality 75–85 is typically indistinguishable from the original at a fraction of the size.
Frequently Asked Questions
How much smaller will my image get?
Typical results: photos (JPG) shrink 60–85% at quality 75–80 with no visible difference; screenshots saved as PNG often drop 70–90% when converted to WebP or quality-85 JPG. A 4 MB phone photo commonly compresses to 400–800 KB. Results vary with image content — busy textures compress less than smooth areas.
What quality setting should I use?
For web use, 75–85 is the sweet spot — visually indistinguishable from 100 for most photos at 3–5× smaller size. Use 85–92 for portfolio/product photography where fine detail matters, and 60–70 for thumbnails. Below 50, blocky artifacts become visible in gradients and skin tones.
Is there a file size or usage limit?
No hard limit — because compression runs on your own device, there's no server quota to enforce. Practical limits come from your device's memory: images up to 50–80 megapixels work fine on typical phones and laptops. Compress as many images as you like, free.
Is the image compressor really free?
Yes — 100% free with no hidden charges, trial limits, or premium tiers for core features. No account or email needed. The site is supported by non-intrusive display ads, which keeps every tool free for everyone.
Are my files private when using the image compressor?
Completely. The image compressor processes everything locally in your browser — your files are never uploaded to any server. When you close the tab, everything is gone. This makes it safe for confidential documents, client work, and personal photos.
Does the image compressor work on mobile phones?
Yes. It's built mobile-first and works on any modern phone browser — iPhone (Safari) and Android (Chrome) included. You can pick files straight from your camera roll and download results directly to your device.
Do I need to install any software to use the image compressor?
No. The image compressor runs entirely in your web browser — no downloads, extensions, or signup. Open the page, use the tool, download your result. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.