Choose up to 20 JPG photos from your device, or drop them into the upload zone. Press COMPRESS to begin. All processing happens in your browser — your files never leave your device.

    Tap any thumbnail to fine-tune quality settings. Save files one by one or grab everything at once.

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      JPEG Compression: Complete Guide

      JPEG compression reduces file sizes by removing image data that the human eye typically doesn't notice. Our tool uses MozJPEG, an advanced encoder developed by Mozilla that achieves better compression ratios than standard JPEG encoders while maintaining excellent visual quality.

      Key Fact: A typical high-resolution photo can be compressed by 60-80% without visible quality loss. This means faster page loads, easier sharing, and significant storage savings.

      Why Compress JPEG Images?

      Large image files create real problems across many use cases:

      Website Performance

      Images typically account for 50-70% of a webpage's total size. Unoptimized photos slow down page load times, hurt SEO rankings, and increase bounce rates. Google explicitly uses page speed as a ranking factor.

      Storage and Bandwidth

      Whether you're storing photos in the cloud, on your device, or hosting them on a server, smaller files mean lower costs and more capacity. Email services and messaging apps often have strict size limits that uncompressed photos exceed.

      Faster Sharing

      Compressed images upload and download faster, making sharing smoother on any connection—especially important for mobile users on limited data plans.

      Pro Tip: For web use, aim for images under 200KB. Most photos can reach this size at quality 75-85 without visible degradation.

      How JPEG Compression Works

      JPEG uses lossy compression, which means some image data is permanently removed to achieve smaller files. The compression process:

      1. Converts colors to a format where brightness and color information are separated
      2. Divides the image into 8×8 pixel blocks
      3. Applies mathematical transforms to identify less important visual information
      4. Removes data based on the quality setting you choose

      MozJPEG improves on standard JPEG encoding by using smarter algorithms to decide what data to remove, achieving 5-15% better compression at the same visual quality.

      Important: Each time you save a JPEG, it's compressed again. Avoid repeatedly editing and saving the same JPEG—work with the original or use a lossless format for editing.

      Choosing the Right Quality Level

      Quality Best For Typical Reduction
      90-100 Archiving, professional photography 20-40%
      75-89 Web images, social media, email 50-70%
      60-74 Thumbnails, previews 70-85%
      Below 60 Maximum compression when quality is secondary 85%+

      How to Use This Tool

      1. Add files — Click SELECT FILES or drag up to 20 JPEGs into the drop area
      2. Compress — Click COMPRESS to process all files with optimal settings
      3. Fine-tune (optional) — Click any thumbnail to manually adjust quality with the slider
      4. Download — Save individual files or use SAVE ALL

      Typical Results

      Smartphone photo (4MB): Compressed to ~400KB at quality 80 — 90% reduction

      DSLR image (12MB): Compressed to ~800KB at quality 85 — 93% reduction

      Screenshot with photos (2MB): Compressed to ~300KB at quality 75 — 85% reduction

      Privacy and Security

      Your images never leave your device. All compression happens locally in your browser using WebAssembly technology:

      • No server uploads — processing is 100% client-side
      • No data collection — we cannot see your images
      • No registration — just open and use
      • Original files preserved — only the downloads are compressed

      Ready to Compress?

      Drop your JPEG files above to get started. Need to compress PNG or GIF images? Use the tabs above to switch formats.