How to Compress Images Online
Large image files can slow down your website, take up too much storage space, and make sharing difficult. Our client-side image compressor allows you to reduce file sizes instantly without sacrificing quality.
- Upload your image: Drag and drop your JPG, PNG, or WEBP file into the upload zone, or click to browse your device.
- Choose your format: Select your desired output format. For web use, WEBP offers the best balance of quality and file size.
- Adjust the quality: Use the slider to find the perfect balance between visual clarity and file size. You'll see a live preview of the compression artifacts and the new file size.
- Target a specific size (Optional): Need your image to be exactly under 500KB? Enter your target size and click "Auto-Adjust" to let our algorithm find the best settings.
- Download: Click "Instant Download" to save the optimized image to your device.
Frequently Asked Questions
Does compressing my image change its resolution or dimensions?
No. This tool only reduces the file size (kilobytes or megabytes) by optimizing the data and adjusting the visual quality. Your image's physical dimensions (width and height in pixels) will remain exactly the same. If you need to change the actual dimensions, you can use our Image Resizer.
Are my images uploaded to a server?
No. This tool processes everything entirely inside your web browser. Your files never leave your device, ensuring complete privacy and faster processing times.
Why did my PNG file size increase?
PNG is a lossless format, meaning the quality slider doesn't degrade the image data. If you upload a heavily optimized image and our tool re-encodes it using standard browser algorithms, the resulting file might be larger. We recommend converting to WEBP or JPEG for significant size reductions.
What is the best image format for websites?
In most modern scenarios, WEBP is the best format. It provides superior lossless and lossy compression for images on the web, often resulting in files 25-35% smaller than comparable JPEGs.