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Image Compression Tools

Reduce file sizes for images, video, audio, and PDFs without installing software

Compress Image

Reduce image file size while maintaining quality

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Compress PNG

Optimize PNG files for smaller file sizes

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Compress JPG

Reduce JPG file size with adjustable quality

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Compress AVIF

Optimize AVIF images for smaller file sizes

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Compress BMP

Convert and compress BMP files to smaller formats

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Compress WebP

Optimize WebP files for even smaller sizes

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Compress GIF

Optimize animated GIFs for smaller file sizes

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Compress TIFF

Compress TIFF files for archival and web use

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Video Compressor

Compress video files to reduce size while maintaining quality

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MP3 Compressor

Re-encode MP3 files at a lower bitrate to reduce file size

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WAV Compressor

Reduce WAV file size by converting to FLAC, MP3, or optimizing audio settings

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PDF Compressor

Compress PDF files by re-rendering pages at a lower image quality

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Image Quality Reducer

Reduce image quality by percentage, target size, or quality level

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FLAC Compressor

Re-compress FLAC files at a lower compression level to balance encoding speed and file size

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About Compression Tools

A 5MB JPEG from a digital camera can drop to 400KB with minimal visible quality loss. A 12MB PDF portfolio can shrink to under 2MB for email. These are the kinds of reductions that make websites load faster, emails actually send, and cloud storage last longer. This category covers compression tools for JPG, PNG, WebP, AVIF, GIF, TIFF, BMP, PDF, video (MP4, WebM, MOV), and audio (MP3, WAV, FLAC). Every tool runs in your browser using the Canvas API, pdf-lib, or FFmpeg compiled to WebAssembly. Your files stay on your device.

When to Use These Tools

  • •Cutting a 3MB hero image down to 200KB so your landing page loads in under 2 seconds on mobile
  • •Shrinking PDF attachments from 15MB to under the 10MB Gmail limit without losing readable text
  • •Compressing a 50MB MP4 video to 8MB for WhatsApp or Discord uploads
  • •Reducing PNG file sizes for app icons and UI assets where transparency is required
  • •Batch-compressing product photos for an ecommerce store with hundreds of SKUs
  • •Converting FLAC music files to compressed MP3 at 192 kbps for a car stereo that does not support lossless

Benefits

  • •JPG compression typically achieves 70 to 90% file size reduction at quality 80
  • •WebP output is 25 to 35% smaller than equivalent JPG at the same visual quality
  • •PDF compression removes duplicate objects and downsamples images to 150 DPI for screen viewing
  • •Video compression uses FFmpeg CRF encoding with presets from 18 (high quality) to 28 (small file)
  • •Audio compression supports constant bitrate (128, 192, 320 kbps) and variable bitrate modes
  • •Batch processing handles dozens of files in one session with a ZIP download

Tips for Best Results

  • •Start at quality 80 for JPG and adjust down in steps of 5 until you see visible artifacts
  • •Use WebP instead of JPG for web images: Chrome, Firefox, and Safari all support it as of 2024
  • •For PNG files with few colors, try lossless compression first before switching to lossy
  • •Compress video with H.264 codec and CRF 23 for a good balance of size and quality on most content
  • •Run audio through 192 kbps MP3 for general listening, or 320 kbps if you need near-transparent quality
  • •Compress images before inserting them into a PDF rather than compressing the finished PDF

Practical Examples

Ecommerce product photo optimization

A Shopify store with 200 product photos at 2.5MB each (500MB total) compressed each to 180KB at JPG quality 82. Total catalog size dropped to 36MB. Page load time went from 4.1 seconds to 1.3 seconds on a 4G connection.

Email attachment that would not send

A 14MB PDF report exceeded the 10MB Outlook attachment limit. PDF compression reduced it to 3.2MB by downsampling embedded images to 150 DPI and removing duplicate font subsets. Text remained crisp at 100% zoom.

Wedding video for family sharing

A 4K wedding video at 1.8GB (MOV, H.265) compressed to 720p H.264 at CRF 24. Output was 95MB, small enough to share via Google Drive. Total processing time: about 8 minutes on a 2021 MacBook Air.

Podcast audio for distribution

A 45-minute podcast recorded as WAV at 96kHz/24-bit (about 180MB) compressed to MP3 at 192 kbps. Result: 62MB, suitable for Spotify and Apple Podcasts uploads with no audible quality loss for spoken content.

Common Mistakes to Avoid

  • •Compressing the same JPG multiple times: each pass degrades quality further, a process called generation loss
  • •Using JPG for images with sharp edges or text: artifacts appear around high-contrast boundaries
  • •Setting video CRF below 18: file sizes balloon with no perceptible quality improvement
  • •Forgetting to keep an uncompressed original as a backup before batch processing
  • •Using 320 kbps MP3 for spoken-word content: 128 kbps is sufficient and produces files 60% smaller

References and Further Reading

Frequently Asked Questions

Conclusion

Compression is the single fastest way to improve website performance and reduce storage costs. The tools in this category handle every common format from JPG to MP4 to PDF, all in your browser. Pick the format you need above, drag in your file, and adjust the quality slider until the size fits your target.