Free Image Compressor
Compress images to any file size — enter your target in KB and download optimized photos instantly. All processing happens in your browser. Free, private, no signup.
Popular Compression Targets
Need a specific file size? Jump to a preset compressor:
Compress by Format
Need to compress a specific image format? Jump to a format-specific compressor:
How Image Compression Works
Our image compressor uses a smart binary-search algorithm to find the best quality setting that keeps your image at or below your target file size. Here is what happens when you compress:
- Upload your image — Select any JPEG, PNG, or WebP file from your device. You can upload multiple images at once for batch compression.
- Set your target size — Enter the maximum file size in KB. The compressor will ensure every image is at or below this target.
- Smart compression — The tool iteratively adjusts JPEG or WebP quality, and scales dimensions down only if needed, to hit your exact target while preserving maximum visual quality.
- Download — Download individual compressed images or all of them at once.
All processing happens entirely in your browser using the Canvas API. Your images are never uploaded to any server — they stay on your device throughout the entire process.
JPEG vs WebP — Which Format Should I Choose?
JPEG is the most universally compatible format. Choose JPEG when you need the image to work everywhere — email, older browsers, print services, and government portals.
WebP produces smaller files at the same visual quality (typically 25-35% smaller than JPEG). Choose WebP for websites, modern apps, and any platform that supports it. All modern browsers support WebP.
Frequently Asked Questions
- Can I compress images without losing quality?
- All lossy compression reduces some quality, but the loss is often invisible to the human eye. Our tool maximizes quality at your target file size — it uses the highest possible quality setting that still meets your target, so you get the best result for the size you need.
- Is there a limit on how many images I can compress?
- No. Since all processing happens in your browser, there are no server-side limits. You can compress as many images as you want, as many times as you want. It is completely free with no daily limits.
- Do you store or upload my images?
- No. Your images never leave your device. All compression is performed locally in your web browser using JavaScript. We do not upload, store, or have access to any of your images.