線上調整影片大小
調整影片大小 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
載入影片
步驟 2
選擇尺寸或比例（16:9、9:16、1:1.）
步驟 3
下載調整後的影片
隱私保護
本地調整大小。您的影片永遠不會離開您的設備。
為Instagram Reels調整大小 — 免費線上，無需註冊
Instagram Reels需要垂直9:16格式（1080x1920）。將橫向影片調整為理想格式。
技術詳情
透過精確縮放，將影片調整為 4K、1080p、720p 或 480p：放大以提高解析度，或縮小以減輕檔案大小。
Why choose our online video resizer
Our online video resizer 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 resize video online without installing heavy software like HandBrake, Adobe Media Encoder or VLC.
Cross-device compatibility — PC, Mac, iPhone, Android
Our video resizer 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.