Compress PNG Images

100% Private • Report Issue

Select File

or drag and drop files here

Select an image file to compress (JPG, PNG, WebP)

Step-by-Step Workflow

01

Upload PNG file for optimization

02

Wait for processing to finish

03

Download results

Specifications

Compression type
Lossless (zero quality loss)
Typical savings
40-70% for unoptimized PNGs
Optimized PNGs
5-20% additional savings

The Challenge

PNG exports from design tools (Photoshop, Figma, Illustrator) are poorly optimized, creating 5-20MB files for simple logos or graphics. Websites hosting 30 PNG product images (150MB total) load 4-6 seconds on mobile, causing 50%+ bounce rates before content renders. Unoptimized PNGs waste cloud storage—100 screenshots at 8MB each consume 800MB vs 300MB optimized (62% savings). Email services reject PNG-heavy attachments, forcing cloud link workarounds that fragment communication. Lossless PNG compression reduces files 40-70% with pixel-perfect quality. Every pixel, transparency level, and color value remains identical. Unlike JPG compression, zero visual degradation occurs—perfect for logos, UI screenshots, graphics requiring transparency.

Best Practices

  • Compress PNG exports immediately after design tool export—Photoshop/Figma defaults are unoptimized, saving 40-70% instantly
  • Screenshots compress best when capturing UI with solid colors—complex gradients or photos compress less (20-30% vs 60-70%)
  • Logos with few colors compress better than detailed illustrations—simplify designs for optimal file size
  • Convert photo PNGs to JPG before compressing—PNG lossless is inefficient for photos, JPG at 85% is 3-5× smaller
  • Batch compress entire PNG libraries yearly—new algorithms provide 5-20% additional savings on already-optimized files
  • For web use, consider WebP format after PNG optimization—lossy WebP compresses PNG content 30-50% smaller than lossless PNG
  • Preserve transparency when compressing—lossless PNG maintains alpha channel perfectly unlike JPG which requires background fill
  • Compress before uploading to CMSs—WordPress/Shopify store original uploads, compress beforehand to save hosting storage
  • Use PNG for text-heavy images (screenshots, diagrams)—lossless preserves sharp text edges unlike lossy JPG artifacts
  • Store design source files uncompressed—compress exported PNGs for distribution only, keep layered files at full quality

Frequently Asked Questions

What does lossless PNG compression mean?

Lossless means zero quality loss—decompressed image is pixel-for-pixel identical to original. Every color value, transparency level, and pixel position unchanged. Compression optimizes how data is encoded (better DEFLATE algorithm, removing unnecessary metadata) without discarding visual information. Unlike lossy JPG which permanently removes data, lossless PNG can be compressed and decompressed infinitely without degradation.

How much will my PNG actually compress?

Unoptimized PNGs (Photoshop/Figma defaults): 40-70% reduction. Already-optimized PNGs (TinyPNG/ImageOptim): 5-20% additional savings. Screenshots with solid colors: 60-70% reduction. Photos saved as PNG: 20-30% reduction (convert to JPG instead). Logos with transparency: 50-60% reduction. Complex gradients: 30-40% reduction. Test one file first to estimate batch results.

Can I compress PNG multiple times for more savings?

Yes, but diminishing returns. First optimization (unoptimized → optimized): 40-70% savings. Second optimization (optimized → re-optimized): 5-20% additional savings. Third optimization: <5% gains. Practical approach: optimize once at level 70, re-optimize yearly with newer algorithms for incremental improvements. Lossless means quality never degrades regardless of compression passes.

Should I use PNG or JPG for screenshots?

PNG for text-heavy screenshots (code, terminal output, UI elements)—lossless preserves sharp text edges. JPG for photo-heavy screenshots (product images, design mockups with photos)—lossy compression at 80% adequate for photographic content. Test: if >50% screenshot is text/UI, use PNG. If <30% text (mostly photos), use JPG at 85% for 3-5× smaller files.

Why not convert PNG to WebP instead of compressing?

WebP offers 30-50% additional savings over optimized PNG via lossy compression, but 95% browser support (fails IE11). Use PNG when: need 100% compatibility, require pixel-perfect lossless quality, dealing with professional design assets. Use WebP when: modern browsers only, accept slight quality loss, prioritize smallest possible file. Ideal: offer both formats with <picture> fallback.

Does PNG compression remove transparency?

No. Alpha channel transparency preserved perfectly—lossless compression maintains every transparency level from 0% (fully transparent) to 100% (fully opaque). Compression optimizes how transparency data is encoded without changing pixel values. Unlike converting PNG to JPG (which requires background color fill), PNG compression keeps transparency intact.

What compression level should I use for different PNG types?

Level 70 (default) for general use—best balance of compression and speed. Level 256 (maximum) for final production assets where processing time irrelevant (logos, icons, static graphics). Level 30-50 for batch processing thousands of files where speed matters. Level choice affects processing time only—all levels are equally lossless, just produce slightly different file sizes (5-15% difference between levels).