護照與簽證照片線上壓縮 - Pic Compress
線上壓縮護照與簽證照片。可壓縮至 50KB、100KB 或申請系統要求的大小，適用於護照與簽證線上申請。圖片只在瀏覽器本機處理，保障檔案隱私。
拖放圖片到這裡
選擇檔案
支援格式：JPG、PNG、WebP、GIF、SVG、AVIF、ICO、HEIF、HEIC、TIFF、BMP、RAW、BMP
單個檔案最大：50MB
壓縮設定
常見問題 - Pic Compress
什麼是圖片壓縮？
圖片壓縮在保持可接受的視覺品質的同時減小圖片的檔案大小。這使得圖片載入更快，佔用更少的儲存空間。
支援哪些圖片格式？
我們支援 JPG/JPEG、PNG、WebP、GIF、SVG 和 AVIF 格式。您可以在這些格式之間進行壓縮和轉換。
壓縮會降低圖片品質嗎？
壓縮可能會降低品質，但我們的工具允許您控制品質級別。您也可以使用無損壓縮來保持原始品質，同時仍能減小檔案大小。
如何選擇合適的品質設定？
對於網頁使用，70-85% 的品質通常能提供良好的平衡。用於列印時，使用 90-100%。較低的設定（50-70%）適用於縮圖。
我的資料安全嗎？你們會上傳檔案到伺服器嗎？
您的檔案完全安全。所有壓縮都在您的瀏覽器中使用 JavaScript 本地進行。沒有檔案會上傳到我們的伺服器。
可以在行動裝置上壓縮圖片嗎？
可以！我們的工具在所有現代瀏覽器上都能工作，包括行動裝置。
有損壓縮和無損壓縮有什麼區別？
有損壓縮透過刪除一些圖片資料來減小檔案大小，這可能會稍微影響品質。無損壓縮在不損失任何品質的情況下減小檔案大小，但壓縮效果較小。
Can I compress images in batch?
Yes! You can upload and compress up to 20 images simultaneously. Our tool processes all images in parallel for maximum efficiency.
What browsers are supported?
Our tool works on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. We recommend using the latest browser version for best performance.
Do I need to install any software?
No installation required. Our tool runs entirely in your browser. Simply visit the website and start compressing images immediately.
Can I compress images on my phone or tablet?
Yes! Our tool is fully responsive and works on smartphones, tablets, and desktop computers. The interface adapts to your screen size.
What should I do if compression fails?
If compression fails, try refreshing the page and uploading the image again. Ensure your browser is up to date and the file is not corrupted.
Can I convert between image formats?
Yes! Our tool allows you to convert images between different formats during compression. For example, you can convert PNG to JPG or WebP.
How do I choose the right target file size?
Choose target size based on your use case: 10-50KB for thumbnails and icons, 50-100KB for email attachments, 100-200KB for web images, 200-500KB for high-quality photos.
Is there a limit on how many images I can compress?
There is no daily limit on the number of images you can compress. You can process up to 20 images per batch, and you can run as many batches as needed.
Do you store my images after compression?
No. All processing happens locally in your browser. We never store, upload, or access your images. Your files remain completely private.
Can I use compressed images for commercial purposes?
Yes! You can use compressed images for any purpose, including commercial projects. Our tool is free to use without restrictions.
Why is my compressed image larger than expected?
This can happen with very small images or images with simple content. In these cases, the compression overhead may result in minimal size reduction.
How can I get the best compression results?
For best results: resize images before compression, choose appropriate quality settings (70-85% for web), use target size feature for specific requirements, and consider converting to WebP or AVIF formats.