Compress PNG images to reduce file size while preserving transparency and sharp details.
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Max file size: 10MB · Max 2 files at once
PNG files are lossless and high quality, but they can be unnecessarily large. ConvertFile compresses your PNG images on our secure server using advanced optimization techniques, reducing file size while preserving transparency and sharp details.
Select or drag and drop your PNG files
Adjust the quality slider to your desired balance
Click Compress and download your optimized PNG
PNG files are often larger than they need to be because different tools use different compression levels when saving them. A screenshot saved by your OS may be 2-3x larger than the same image optimized with proper PNG compression.
Compressing PNG is critical for web performance. Large PNG files for icons, logos, and UI elements add up quickly and slow down page loads. A well-optimized PNG delivers the same lossless quality at a significantly smaller file size.
| Aspect | Uncompressed | Compressed PNG |
|---|---|---|
| Compression Level | Default / minimal | Optimized / maximum |
| File Size (typical) | 500 KB - 2 MB | 200 KB - 800 KB |
| Visual Quality | Lossless | Lossless (identical pixels) |
| Transparency | Preserved | Preserved |
| Web Performance | Slower loading | Faster, optimized loading |
| Best For | Raw output from tools | Web, apps, sharing |
PNG uses the DEFLATE compression algorithm, which is lossless. This means the compressed image is pixel-identical to the original. PNG compression works by finding patterns in the pixel data and encoding them more efficiently. Different compression levels and filter strategies can produce significantly different file sizes from the same source image, all with identical visual output.
PNG optimization goes beyond simple compression. Advanced techniques include optimizing the color palette, removing unnecessary metadata (EXIF data, color profiles), choosing the best filter strategy for each row of pixels, and applying maximum DEFLATE compression. These optimizations can reduce file size by 20-60% without changing a single pixel.
Your PNG files are processed on our secure server and temporarily stored for you to download. All uploaded files are automatically deleted within 1 hour. We do not access, analyze, or share your files with any third party.
Yes. PNG compression is lossless by default, meaning the compressed image is pixel-identical to the original. No visual information is discarded during the process.
Typical reductions are 20-60% depending on the source image and how it was originally saved. Screenshots and images from design tools often see the biggest improvements.
Yes. PNG alpha channel transparency is fully preserved during compression. Transparent areas remain transparent.
Yes. Upload multiple PNG files and they will all be compressed with the same settings. Download them individually or as a batch.
Many tools save PNGs with minimal compression for speed. Screenshots, design exports, and auto-generated images often use the fastest (least compressed) PNG settings. Re-compressing them with optimized settings can dramatically reduce file size.
Files are temporarily stored for download and automatically deleted within 1 hour. We do not keep copies beyond this period.
No. Compression only reduces file size by optimizing the encoding. The image width, height, and pixel content remain unchanged.
Use PNG for images that need transparency, sharp text, or pixel-perfect quality (logos, icons, screenshots). Use JPG for photographs where smaller file size matters more than perfect pixel accuracy.