Image Compressor

Compress images client-side with an adjustable quality slider. Compare before and after file sizes instantly.

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1. Upload one or more images by dropping them onto the upload area or clicking to browse. 2. Adjust the quality slider to control the compression level from 1% to 100%. 3. Select the output format (JPEG, PNG, or WebP) for the compressed images. 4. Compare the original and compressed file sizes shown in the results panel. 5. Download individual compressed images or all of them at once.

About This Tool

The Image Compressor reduces image file sizes directly in your browser using Canvas API re-encoding. Upload any JPEG, PNG, or WebP image, adjust the quality slider, and instantly see the compressed result alongside a before-and-after file size comparison. No server uploads are involved - your images stay on your device the entire time.

Large image files slow down websites, eat up storage, and take forever to send via email or messaging apps. This tool gives you precise control over the compression-quality tradeoff. The real-time preview lets you find the sweet spot where the image still looks great but the file size is dramatically reduced. For JPEG and WebP formats, even a modest quality reduction can cut file sizes by 50-80% with minimal visible difference.

The tool displays both the original and compressed file sizes along with the percentage saved, so you always know exactly how much space you are reclaiming. Once you are satisfied with the result, download the compressed image in one click. This is perfect for optimizing images before uploading to websites, social media, or sending as email attachments.

Frequently Asked Questions

The tool draws your image onto an HTML5 Canvas element, then exports it using the toBlob or toDataURL method with a quality parameter. Lowering the quality parameter tells the browser encoder to use more aggressive compression, reducing file size at the cost of some visual fidelity.
You can compress JPEG, PNG, and WebP images. JPEG and WebP benefit the most from quality adjustment since they use lossy compression. PNG is lossless by nature, so the tool re-encodes it as JPEG or WebP for meaningful size reduction.
At quality settings of 70-80%, most images show little to no visible difference to the human eye while achieving significant file size reduction. Use the real-time preview to compare the original and compressed versions side by side before downloading.
There is no strict limit since everything runs in your browser. However, very large images (above 50 MB) may cause slower processing depending on your device. Most images compress in under a second.
No. All compression happens locally in your browser using the Canvas API. Your images never leave your device, making this tool safe for sensitive or private photos.

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