Image Compressor
Free online image compressor. Reduce JPEG, PNG and WebP file size without leaving your browser. Adjust quality and preview in real-time. All processing is local and private.
or drag and drop anywhere • JPEG, PNG, WebP
How to Use Image Compressor
Upload an Image
Click or drag an image file into the upload area. Supports JPEG, PNG, and WebP formats. The tool processes everything locally in your browser — no server upload.
Adjust Quality
Use the quality slider to balance file size against visual quality. Lower quality = smaller file. The preview updates to show compression results in real-time.
Download the Compressed Image
Click "Download" to save the compressed image. Compare the original and compressed file sizes. Typical savings: 50-80% for JPEG, 30-60% for PNG.
Frequently Asked Questions
How does image compression work?
For JPEG and WebP, compression reduces quality by discarding visual data the human eye barely notices — this is lossy compression. For PNG, the browser's encoder applies lossless compression. Our tool uses the Canvas API to re-encode images at your chosen quality setting. All processing is local — images never leave your browser.
What quality setting should I use?
For photos on the web: 70-85% quality is the sweet spot — good visual quality at significantly reduced size. For images with text or sharp lines: use 85-95% to preserve clarity. For thumbnail previews: 50-60% is acceptable. Always check the preview before downloading — what is acceptable depends on your use case.
Can I compress PNG images?
Yes. The tool compresses PNG by re-encoding with the browser's PNG encoder. Savings are typically smaller than JPEG (30-60% vs 50-80%) because PNG uses lossless compression internally. For maximum PNG compression, use dedicated tools like pngquant or oxipng that apply advanced quantization.