圖片壓縮器
直接在瀏覽器中壓縮和轉換圖片！
選擇圖片
把圖片拖放到這裡或點擊選擇
圖片壓縮是什麼？
The Image Compressor reduces file sizes of JPEG, PNG, and WebP images while maintaining visual quality. Image optimization is essential for fast-loading websites, email attachments, social media uploads, and conserving storage space on your devices. Large images are the number one cause of slow web pages, with studies showing that a 1-second delay in page load time reduces conversions by 7%. Properly compressed images can reduce file sizes by 60-80% with minimal visible quality loss, dramatically improving page speed and user experience. This tool processes images entirely in your browser — no uploads to external servers. Adjust the compression level to find your ideal balance between file size and quality, preview the result side by side, and download the optimized image instantly.
- ✓ 在瀏覽器內完成所有處理，圖片不上傳至伺服器
- ✓ 支援 JPEG、PNG、WebP 等主要圖片格式
- ✓ 可調整壓縮等級，靈活平衡品質與檔案大小
- ✓ Side-by-side preview to compare original and compressed quality
- ✓ Batch processing for compressing multiple images at once
常見問題
▶支援哪些格式？
你可以在 PNG、JPEG 和 WebP 格式之間互相轉換。每種格式在品質和檔案大小方面各有優勢。
▶有檔案大小限制嗎？
因為處理是在瀏覽器中進行的，非常大的圖片可能會比較慢。建議使用 20MB 以下的圖片效果最好。
▶圖片品質會受影響嗎？
你可以用滑桿控制品質。品質越高，檔案越大。大多數情況下 80% 品質是不錯的平衡點。
▶How much can images be compressed without losing quality?
Most photos can be compressed by 60-80% before noticeable quality loss. JPEG images are especially compressible. The ideal compression level depends on the intended use — web images can tolerate more compression than print materials.
▶What's the difference between lossy and lossless compression?
Lossy compression permanently removes some data to achieve smaller files (JPEG). Lossless compression reduces size without any data loss (PNG). Lossy gives smaller files but with slight quality reduction; lossless preserves perfect quality but with larger files.
▶Is my image data secure?
Yes. All compression happens locally in your browser using client-side JavaScript. Your images are never uploaded to any server, ensuring complete privacy and security of your files.
探索更多 Testive 服務 👀