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Image Compressor

Optimize your images for the web instantly. All processing happens in your browser, so your photos remain 100% private.

How to Use This Image Compressor

Compressing your images is quick, easy, and completely private:

  1. Select your image – Click to upload or drag and drop JPG, PNG, or WebP files.
  2. Adjust quality settings – Choose your desired compression level (higher = better quality, larger file).
  3. Preview the result – See the compressed image and compare file sizes.
  4. Download – Save your optimized image with one click.

All compression happens locally in your browser. Your images are never uploaded to any server, ensuring complete privacy.

Why Compress Images?

Image compression is essential for modern web performance and storage management:

  • Faster website loading: Large images are the #1 cause of slow websites. Compressed images load up to 10x faster.
  • Better SEO rankings: Google considers page speed a ranking factor. Optimized images improve your search position.
  • Reduced bandwidth costs: Smaller images mean lower hosting and CDN costs.
  • Improved user experience: Visitors leave slow sites. 53% of mobile users abandon pages that take over 3 seconds to load.
  • Save storage space: Keep more photos on your device or cloud storage.
  • Faster email delivery: Compressed images attach and send much faster.
  • Social media optimization: Meet platform size requirements while maintaining quality.

Understanding Image Compression

There are two main types of image compression:

Lossy Compression

Removes some image data to achieve smaller file sizes. Best for photographs and complex images where minor quality loss isn't noticeable. JPEG uses lossy compression.

  • Can reduce file sizes by 70-90%
  • Quality loss is often imperceptible at moderate settings
  • Cannot be reversed – original data is permanently removed

Lossless Compression

Reduces file size without removing any image data. Best for graphics, logos, and images where every pixel matters. PNG can use lossless compression.

  • Typically reduces file sizes by 20-50%
  • Perfect quality preservation
  • Original image can be perfectly reconstructed

Recommended Settings by Use Case

Choose your compression level based on how you'll use the image:

  • Website hero images: 70-80% quality – balance of appearance and speed
  • Blog post images: 60-75% quality – good for most web content
  • Thumbnails: 50-70% quality – small display size hides compression artifacts
  • Email attachments: 60-70% quality – faster sending and receiving
  • Social media: 70-85% quality – platforms often recompress anyway
  • E-commerce products: 80-90% quality – show product details clearly
  • Professional photography: 85-95% quality – minimal visible loss
  • Archival storage: 90-100% quality or use PNG for lossless

Frequently Asked Questions

Is my image uploaded to a server?

No. Unlike most online compressors, this tool processes images entirely in your browser using JavaScript. Your photos never leave your device. This makes it faster, more private, and works even offline.

What image formats are supported?

This tool supports the most common web formats: JPEG/JPG, PNG, and WebP. These cover the vast majority of images used on websites, in emails, and on social media.

How much can I reduce the file size?

Results vary based on the original image, but typical compression rates are 50-80% reduction. A 5MB photo might compress to 500KB-1MB while maintaining good visual quality. Highly detailed images compress less than simpler ones.

Will compression affect image quality?

With moderate settings (60-80%), quality loss is usually imperceptible to the human eye, especially at web display sizes. Higher compression will show more artifacts, particularly in gradient areas and around text. Always preview before downloading.

Should I use JPG or PNG?

Use JPG for photographs and complex images with many colors. Use PNG for graphics, logos, screenshots, or images requiring transparency. JPG typically produces smaller files for photos, while PNG is better for graphics with solid colors and sharp edges.

Image Optimization Best Practices

Beyond compression, follow these tips for the best results:

  • Resize before compressing: Don't use a 4000px image if you only need 800px. Resize first, then compress.
  • Choose the right format: JPG for photos, PNG for graphics with transparency, WebP for modern browsers
  • Use appropriate dimensions: Match image dimensions to display size – don't make browsers resize
  • Consider WebP: Google's WebP format offers better compression than JPG/PNG with similar quality
  • Remove metadata: EXIF data (camera info, GPS) can add significant file size
  • Batch process: When optimizing multiple images, maintain consistent quality settings
  • Keep originals: Always save uncompressed originals in case you need them later
  • Test on slow connections: Verify images load acceptably on mobile/3G