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.
Nén PNG trực tuyến — Giảm dung lượng không mất chi tiết
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
Xem trước hình ảnh
Cách sử dụng Nén tệp PNG
1
Chọn và tải lên
Upload your PNG images into the optimization stage.
2
Cấu hình & Xem trước
Select Lossless Mode (zero visual change) or Smart Quantization (256/128 colors).
3
Quy trình & Tải xuống
Click 'Compress PNG' to download your optimized, lightweight PNG files.
Kiến trúc kỹ thuật và quyền riêng tư phía máy khách
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.