Compressing images online is one of the fastest ways to improve website performance, reduce storage costs, and speed up file sharing. Our free image compressor reduces JPG, PNG, and WebP file sizes significantly without any visible quality degradation, and everything happens right in your browser - no file is ever sent to a server.
What is Image Compression?
Image compression reduces the file size of a digital image by removing redundant or less-important data. There are two types:
- Lossless compression - no image data is discarded; the file size reduction is more modest but quality is perfectly preserved (common with PNG).
- Lossy compression - some image data is discarded intelligently so the quality loss is imperceptible to the human eye, but the file size reduction can be dramatic (common with JPEG and WebP).
For most web images, lossy compression at 75–85% quality is the sweet spot: the file can shrink by 60–80% while looking virtually identical to the original.
How to Use the Image Compressor
- Select your image - click the upload area or drag and drop a JPG, PNG, or WebP file. You can compress one image at a time.
- Adjust quality and format - use the quality slider to balance file size against visual quality. You can also switch the output format between JPEG and WebP (WebP is typically 25–35% smaller than JPEG at the same quality).
- Download the compressed file - the compressed image is generated instantly in your browser. Click the download button to save it.
Common Use Cases
- Optimizing hero images, product photos, and blog thumbnails for faster page loads
- Reducing image file sizes before uploading to social media or email
- Shrinking photos before attaching them to forms or documents
- Compressing website assets to improve Core Web Vitals scores (LCP, CLS)
- Reducing storage usage when backing up large photo collections
- Preparing images for mobile apps where download size matters
Frequently Asked Questions
How much can I reduce the file size? It depends on the original image. JPEG photos typically compress to 40–70% of their original size at high quality settings. PNGs with large areas of solid color can compress even more dramatically.
What is the difference between JPEG and WebP output? WebP is a modern image format developed by Google that achieves smaller file sizes than JPEG at the same visual quality. It is supported by all major browsers. If you are compressing for the web, WebP is usually the better choice.
Is there a file size limit? There is no strict limit, but very large images (over 20 MB) may take a moment to process depending on your device's performance, since compression runs in your browser.
Can I compress PNG files with this tool? Yes. PNG files are converted to JPEG or WebP during compression. If you need to keep the PNG format (for transparency), lossless PNG compression is best handled with a dedicated tool like oxipng.
Use the Image Compressor free, no sign-up required.