What is PNG Compressor?
PNG files too large? Our compressor optimizes encoding and color quantization to significantly reduce PNG file sizes while maintaining visual quality. Adjust the quality level to find the perfect balance between clarity and file size. Everything runs in your browser — your images stay private. Great for website optimization, email attachments, and cloud storage savings.
Use Cases
- ◆Website image optimization
- ◆Cloud storage savings
- ◆Email attachment compression
- ◆App icon compression
- ◆Batch image processing
How to Use
- 1Upload your PNG image
- 2Adjust compression quality
- 3Preview before/after comparison
- 4Download the optimized PNG
Features
- ✓Adjustable quality
- ✓Before/after preview
- ✓Color quantization optimization
- ✓Browser-local processing
- ✓Free to use
- ✓No signup needed
- ✓Fast processing
- ✓Privacy secure
FAQ
Does PNG compression affect transparency?
We preserve transparency as much as possible. At high quality settings, transparency is nearly unaffected. Very low quality may cause edge artifacts.
Are my images uploaded?
No. All compression happens in your browser. Images never leave your device.
Is PNG compression lossy or lossless?
Two modes: lossless optimizes IDAT encoding and filter strategies (10-25% reduction); lossy uses color quantization to reduce palette size (50-80% reduction).
Will transparency be affected?
Lossless mode fully preserves the alpha channel. Lossy color quantization may cause slight banding on semi-transparent edges, so use lossless for images with transparency.
Which compresses better, PNG or JPG?
JPG achieves higher compression (60-80% for photos) because it is lossy. PNG is better for graphics needing transparency or sharp edges (icons, screenshots) with lower compression but higher fidelity.
Does it support batch PNG compression?
Yes. Upload multiple PNG images for batch processing. Each is compressed and downloadable individually.