PNG圧縮
PNG圧縮 — 無料オンラインPNGサイズ削減
PNGファイルは驚くほど大きくなることがあります。スマートな色量子化アルゴリズムが透明度と視覚品質を保ちながらPNGサイズを大幅に削減 — すべてブラウザ内、アップロード・登録不要。
Why use this compress png tool?
Advanced PNG color quantization for smaller files
Preserves transparency and sharp edges
Batch compress multiple PNGs at once
Quality slider for optimal size/quality
Before/after comparison slider
100% local, private, free, no signup
Frequently Asked Questions
How do I compress a PNG?
Drop your PNG onto the compressor or click to browse. It is compressed instantly in your browser using smart color quantization. Adjust quality if needed, then download.
Can I compress PNG without losing transparency?
Yes. Our PNG compression preserves alpha-channel transparency while reducing file size.
How much can I compress a PNG?
For icons, logos and screenshots, compression of 50–80% is common. The exact ratio depends on image complexity and the quality setting.
Is PNG compression free?
Yes, completely free with no watermark, signup, or file limits. All processing happens locally in your browser.