免費線上轉換影片
轉換影片 線上 直接在瀏覽器中以高品質處理. 立即試用此工具。 - 高速, 簡單, HD畫質, 精準 100% 在瀏覽器中本地處理，檔案不會上傳到伺服器。立即免費試用。
將影片拖放到此處
支援 MP4、WebM、AVI、MOV
支援的格式
使用方法
步驟 1
拖放影片或點擊選擇
步驟 2
選擇輸出格式（MP4、AVI、WebM.）
步驟 3
下載轉換後的影片
常見錯誤
- Uploading a video file too large for the browser (keep it under 2 GB).
- Closing the tab before processing finishes: the conversion stops.
- Using an exotic input format (prefer MP4, WebM, MOV, AVI).
- Picking a bitrate so low that quality drops noticeably.
專業技巧
- Pick H.264 (MP4) for the widest compatibility.
- For the web, use WebM (VP9/AV1): smaller file at the same quality.
- Keep the original: processing is local but the download is final.
- On mobile, plug in the charger for long videos.
隱私保護
您的影片直接在瀏覽器中轉換。不會將檔案上傳到我們的伺服器。
將MP4轉換為AVI或MOV — 免費線上，無需註冊
我們的影片轉換器支援所有流行格式。輕鬆將MP4轉換為AVI以獲得Windows相容性，或將MOV轉換為MP4用於網路和社群媒體。
也試試我們的工具: 免費線上壓縮影片.
技術詳情
我們的轉碼器針對每個容器（MP4、MOV、MKV、WebM），提供接近無損的選項，以忠實保留原始品質。
Why choose our online video converter
Our online video converter stands out with 100% local processing via FFmpeg.wasm directly in your Chrome, Firefox, Safari or Edge browser — no server upload, no queue, no arbitrary size limit. You get a fast, free, no-signup, watermark-free tool compatible with all your MP4, MOV, AVI, MKV, WebM, FLV, WMV, M4V, 3GP files and more. Perfect for YouTubers, TikTokers, Instagram Reels creators, Premiere Pro editors, DaVinci Resolve, CapCut, Final Cut users, marketing pros, e-learning trainers and individuals who want to convert video online for free without installing heavy software like HandBrake, Adobe Media Encoder or VLC.
Cross-device compatibility — PC, Mac, iPhone, Android
Our video converter works on Windows 10, Windows 11, macOS Ventura, Sonoma, Sequoia, Linux Ubuntu, Debian, Fedora, as well as iOS 16+ (iPhone, iPad), iPadOS, Android 10+ (Samsung Galaxy, Google Pixel, Xiaomi, OnePlus) and even Chrome OS on Chromebook. No native app, no APK, no .exe to download: just open the page in your favorite browser and start processing your videos. Compatible with videos from smartphones (4K HDR, slow-motion), GoPro cameras, DJI drones, OBS screen captures, After Effects exports, Loom screencasts and files downloaded from YouTube, Vimeo, TikTok, Twitch or Twitter/X.
Privacy, GDPR compliance and video security
Unlike competing services (Clideo, Kapwing, Veed.io, FlexClip, Online-Convert, Convertio, CloudConvert, FreeConvert, EZGif, Zamzar) that upload your files to remote servers in the US or Asia, our tool processes your entire video in your browser's RAM. Not a single byte is sent over the Internet, ensuring full GDPR, CCPA, LGPD and HIPAA compliance. Perfect for confidential business documents, medical, legal, educational videos, copyrighted content and any personal file you do not want to entrust to any third party.
探索所有影片工具
只需幾次點擊即可壓縮、轉換、剪輯、調整大小和編輯影片。
相關工具
常見問題
支援哪些影片格式？
我們支援 MP4、AVI、MOV、WebM、MKV、FLV、WMV 和 MPEG。轉換會使用優化編解碼器保留原始品質。
轉換後影片品質會保留嗎？
是的，我們的轉換器使用優化的 H.264 和 H.265 編解碼器，盡可能保留您的影片品質，同時縮小檔案大小。
有檔案大小限制嗎？
本地處理取決於您的裝置記憶體。通常支援高達 2GB 的影片。對於大型檔案，我們建議分割。
我應該為 YouTube 或 Instagram 選擇哪種格式？
MP4 是 YouTube、Instagram、TikTok 和 Facebook 推薦的通用格式。它提供與所有裝置和平台的最佳相容性。