How to Use Image Compressor

Quick Start

1. Upload File

   • Drag and drop an image into the upload area
   • Or click to browse and select a file from your computer
   • Supports: PNG, JPG, and WEBP formats
   • Maximum file size: 20MB

2. Choose Output Format

   • Keep original format: Compress without changing format
   • Convert to JPG: Smaller files, no transparency (best for photos)
   • Convert to PNG: Lossless quality, preserves transparency
   • Convert to WEBP: Modern format, best compression with quality

3. Adjust Quality (for JPG/WEBP)

   • Use the quality slider (50-100%)
   • 75-80%: Maximum compression, visible quality loss
   • 85-90%: Recommended balance of quality and size
   • 95-100%: Minimal compression, near-original quality
   • PNG compression is lossless (no quality slider)

4. Compress Image

   • Click "Compress Image" button
   • Compression happens instantly in your browser
   • View file size reduction and compression ratio

5. Download Result

   • Click "Download Compressed" to save your file
   • File is named with "-compressed" suffix
   • Use "Compress Another" to process more files

Privacy & Security

✅ 100% Browser-Based

• All compression happens in your browser using WebAssembly
• Files never leave your device
• No data is sent to any server
• Zero server-side processing

✅ Fast & Efficient

• Instant compression in your browser
• No waiting for uploads or downloads
• File contents remain completely private

✅ Secure

• No file storage
• No tracking of file contents
• HTTPS encryption for credit transactions

Tips for Best Results

Quality Settings

• 50-70%: Maximum compression, smaller files, visible quality loss
• 85-90%: Recommended for web images (great balance)
• 95-100%: Minimal compression, near-original quality

File Size Reduction

• JPG/WEBP at 85% quality typically reduces size by 40-70%
• PNG compression is lossless (re-encodes for optimization)
• Photos and complex images compress best
• Screenshots may not compress as much

Format Selection Guide

• JPG: Best for photos, smallest file size, no transparency
• PNG: Best for graphics with transparency, lossless quality
• WEBP: Modern format with excellent compression and quality

When to Use Each Format

JPG

• ✅ Photos and images with many colors
• ✅ Web images where file size matters
• ✅ Social media uploads
• ✅ Email attachments
• ❌ Logos or graphics requiring transparency

PNG

• ✅ Logos and graphics with transparency
• ✅ Images with text
• ✅ Screenshots
• ✅ When lossless quality is required
• ❌ Large photos (file size will be bigger)

WEBP

• ✅ Modern websites and web apps
• ✅ Best compression with quality
• ✅ Supports transparency
• ✅ Photos and graphics
• ❌ Older browsers (limited support)

Technical Details

• Max file size: 20 MB
• Input formats: PNG, JPG, WEBP
• Output formats: PNG, JPG, WEBP
• Quality range: 50-100% (for JPG/WEBP)
• Processing: Client-side using WASM (@jsquash)

Troubleshooting

File not compressing?

• Check file size (must be under 20MB)
• Verify file format is supported (PNG, JPG, or WEBP)
• Try refreshing the page

Quality looks poor?

• Increase quality slider to 90-100%
• Try different format (WEBP for best quality/size ratio)

File size not reducing much?

• Some images are already well-compressed
• Try converting to different format (JPG for photos, PNG for graphics)
• Lower quality setting for smaller files