Compress Images
Reduce image file size while preserving quality. Supports JPG, PNG, WebP, and more. Batch compression with instant download. 100% browser-based. Zero uploads.
Drop your images here
or click to browse — select multiple images at once
Supports JPG, PNG, WebP, GIF, BMP • Up to 20 MB per file
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Compression Settings
Low
Best quality, slightly smaller. Ideal for photography and print.
Medium
RecommendedGreat balance. Perfect for web, social media, and documents.
High
Maximum compression. Best for email and quick sharing.
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How it works
Three simple steps — everything happens in your browser.
Upload your images
Drag and drop or click to select multiple images. JPG, PNG, WebP, GIF, and BMP are supported.
Choose compression level
Pick Low, Medium, or High. Optionally resize images that are too wide.
Download compressed images
Download individually or grab all compressed images as a single ZIP file.
Why choose ToolKnit for Image Compression?
100% Private — No Server Uploads
Your images never leave your device. All compression is done locally using the Canvas API. No data is sent to any server — ever.
Batch Processing
Compress dozens of images at once. All files are processed simultaneously and packaged into a convenient ZIP download.
Smart Compression
Our algorithm adapts to each image type. Photos get JPEG compression, graphics with transparency stay as PNG — always the best output.
Optional Resize
Optionally downscale images that are too large. Perfect for preparing web-ready images or meeting email size limits.
Pro Tips
- • PNG images with transparency are kept as PNG to preserve the alpha channel.
- • JPEG/WebP images benefit most from compression — photos can shrink 50-80% easily.
- • Enable the resize option to automatically downscale images wider than your chosen limit.
- • For web use, 1920px wide at Medium compression gives excellent results.