Why Compress Images?

Large image files slow down your website, consume mobile data, and take longer to send via email. Our image compressor helps you reduce file sizes by up to 80% while maintaining visual quality that's virtually indistinguishable from the original.

Image compression is essential for web performance. Google considers page load speed as a ranking factor, and images are often the largest files on a webpage. Compressing your images can significantly improve your website's Core Web Vitals scores.

For full optimization workflows, pair compression with resizing images or converting to WebP for even smaller file sizes.

How Image Compression Works

Our compressor uses smart lossy compression algorithms. Lossy compression removes image data that the human eye is less sensitive to, such as subtle color variations and fine details in busy areas. The result is a smaller file that looks nearly identical to the original.

The quality slider controls how aggressively the image is compressed. Higher values preserve more detail but result in larger files. Lower values create smaller files but may introduce visible artifacts.

Need a specific target like 100KB or 200KB? Adjust the quality slider and re-run the compression until the file size meets your limit.

Supported Formats

JPG/JPEG - Best compression results for photographs and complex images with many colors and gradients
PNG - Good for graphics, screenshots, and images with transparency. Compression is less aggressive to maintain quality
WebP - Modern format with excellent compression. Often produces the smallest files with good quality

Recommended Quality Settings

Quality 80-90% - Best balance of size and quality for most images. Recommended for general use
Quality 90-100% - When quality is critical (print, professional portfolio, product photography)
Quality 60-80% - For web images where file size is more important than perfect quality
Quality 40-60% - For thumbnails, previews, and images that will be displayed small

Common Use Cases

Website Optimization: Reduce page load times and improve SEO by compressing all website images
Email Attachments: Stay under email size limits while sharing multiple photos
Social Media: Upload faster and reduce data usage when posting images
Cloud Storage: Save storage space by compressing photos before uploading to cloud services
Document Attachments: Reduce the size of images embedded in Word documents or PDFs

Compression vs Resizing

Image compression reduces file size by optimizing how the image data is stored, without changing the image dimensions. Resizing changes the actual pixel dimensions of the image. For maximum file size reduction, you can combine both techniques: first resize to your needed dimensions, then compress for optimal quality.

Privacy Guarantee

Your images are processed entirely in your browser using the browser-image-compression JavaScript library. We never upload your files to any server. Once you close this page, your images are gone - we have no way to access them. This makes our tool ideal for compressing sensitive or private photos.

Frequently Asked Questions

How much can I reduce the file size?

Typical compression results range from 40-80% file size reduction, depending on the original image and quality setting. Photos with lots of detail compress less than simpler images.

Will compression affect print quality?

For printing, we recommend using quality settings of 90% or higher. At these levels, the compression artifacts are invisible in print. For web-only use, 70-80% quality is usually sufficient.

Can I compress images multiple times?

While technically possible, re-compressing already compressed images can degrade quality. It's best to compress from the original high-quality source whenever possible.

Why are some images compressing more than others?

Images with large areas of solid color or simple patterns compress better than complex photographs with lots of fine detail. The effectiveness also depends on how much the original was already compressed.

Image Compressor