What is the difference between lossless and quantized PNG compression?
Lossless mode strips non-critical metadata and packs pixel streams with 0% visual loss. Quantization reduces palette colors for massive 60%+ size savings.
在线PNG压缩 — 无损压缩PNG文件大小并保留透明通道
Reduce PNG file sizes via smart color quantization and lossless deflation.
Drop PNG images here to compress
Reduce PNG file size with lossless packing or smart quantization
图片预览
如何使用 PNG图像压缩
1
选择并上传
Upload your PNG images into the optimization stage.
2
配置和预览
Select Lossless Mode (zero visual change) or Smart Quantization (256/128 colors).
3
处理和下载
Click 'Compress PNG' to download your optimized, lightweight PNG files.
技术架构与客户端隐私
Processing Engine
Browser Canvas 2D & Binary Transcoder
Privacy Model
100% In-Memory Sandbox · Zero Server Uploads
Format Standards
PNG, JPEG, WebP, SVG, ICO Specifications
Execution Speed
Zero Network Latency · Instant Local Output
Frequently Asked Questions
Is transparency preserved during PNG compression?
Yes. Transparent pixels and alpha gradients remain intact in both compression modes.
Are there watermarks or upload limits?
Never. PDFUtils and IMGUtils are 100% free with zero watermarks and zero limits.