快速的工作流程
旨在減少直接上傳、快速處理和一鍵導出的摩擦。
打開 视频裁剪为正方形。,添加文件,然後選擇目標輸出並運行轉換。
該工具針對 視頻處理 進行了優化,並且在使用 mp4, avi, mov, mkv, webm, flv 作爲輸入時效果最佳。
處理完成後,將結果下載到 mp4, webm, avi 中並在共享之前驗證質量。
视频裁剪为正方形。 是一個隱私優先的實用程序,用於快速 視頻處理。它可以幫助您從 mp4, avi, mov, mkv, webm, flv 過渡到 mp4, webm, avi,並保持一致的輸出質量。
旨在減少直接上傳、快速處理和一鍵導出的摩擦。
文件在隔離的處理流程中進行處理,保留最少且用戶控制清晰。
輸出針對 mp4, webm, avi 的實際用例進行了調整。
可預測的序列可確保跨設備和文件大小的轉換穩定。
视频裁剪为正方形。 接受 mp4, avi, mov, mkv, webm, flv 並導出 mp4, webm, avi。
該管道專爲隱私優先的處理而設計,用戶可以對輸入和輸出進行明確的控制。
使用高質量的源文件,選擇最接近匹配的目標格式,並避免重複的重新轉換週期。
视频裁剪为正方形。 遵循確定性轉換流程,因此結果可重複,並且在文件行爲異常時更容易排除故障。
Crop a video to a specific aspect ratio, removing unwanted borders or backgrounds.
All uploads are processed on secure, encrypted ConvertCraft servers within isolated containers. Your original video files are never modified — we work on copies. Every uploaded file and processed output is permanently deleted from our servers immediately after processing, with no backups or caching retained.
This tool uses FFmpeg's crop filter to extract a rectangular region from each video frame based on a target aspect ratio and anchor position. The crop filter syntax is crop=width:height:x:y, where x and y are calculated from the selected gravity (center, top, bottom, left, right). The tool computes the largest possible crop rectangle that fits the target ratio within the source dimensions, then positions it according to the anchor. Supported ratios include 16:9, 9:16, 1:1, 4:3, and 4:5 — covering all major social media and broadcast specifications.
Essential for repurposing landscape video for portrait-first platforms — crop 16:9 footage to 9:16 for TikTok, Reels, and YouTube Shorts without adding black bars. Also ideal for creating 1:1 square crops for Instagram feed posts, 4:5 vertical crops for Instagram and Facebook feeds, or removing unwanted edges and backgrounds from screen recordings. Perfect when you need the output to completely fill the target frame without any padding.
See the detailed comparison guide or try a related tool:
MP4, MOV, AVI, MKV, WebM and more