壓縮影片

在瀏覽器中壓縮MP4、MOV和WebM影片。檔案不會離開您的裝置 — 免費、隱私保護、無需註冊。

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壓縮影片

在瀏覽器中壓縮MP4、MOV和WebM影片。檔案不會離開您的裝置 — 免費、隱私保護、無需註冊。

Supports .mp4,.mov,.webm,.mkv,.avi files up to 200MB

最多縮小80%

不需上傳 — 在瀏覽器中運行

無浮水印

無需註冊

為什麼影片檔案這麼大

影片是最重的媒體類型:一分鐘的1080p手機影片通常為60-130 MB,而4K影片則是三倍。螢幕錄影機和手機相機優先考慮速度而非效率,編碼的位元率遠高於內容所需。

大多數分享平台無法接受如此大的檔案 — Gmail附件上限為25 MB,WhatsApp在多數平台上限為64 MB,Discord免費版上限為10 MB,學習平台通常拒絕超過100 MB的檔案。

使用高效的編碼設定重新編碼通常可以減少50-80%的大小,且不會有明顯的畫質變化,因為原始檔案只是浪費了位元。

隱私設計:您的影片不會離開您的裝置

這個壓縮器完全在您的瀏覽器中運行,使用WebAssembly。影片在本地解碼、重新編碼和重建 — 沒有任何內容被上傳、儲存或在伺服器上處理。

這對影片來說比其他檔案類型更重要:會議錄影、講座錄影、家庭影片和未發布的內容都保持在原地。這也意味著無需等待上傳 — 當輸入檔案達到數百MB時,這是一個真正的時間節省。

這樣的交換是誠實的:編碼使用您裝置的處理器,因此長影片需要幾分鐘。實時進度百分比會顯示確切的進度。

壓縮器的技術運作

您的影片被重新編碼為H.264 — 這是最兼容的編碼格式 — 在感知調整的品質水平(CRF 28),解析度超過1280px寬的影片會被縮小到適合分享的大小,同時保持長寬比。

音頻被轉換為128 kbps AAC,檔案被打包為快速啟動MP4,這意味著當從聊天應用、電子郵件預覽或網頁串流時會立即開始播放。

結果可以在任何地方播放:每個瀏覽器、每支手機、WhatsApp、Discord、PowerPoint嵌入和學習管理系統播放器。如果您的影片已經有效編碼,工具會告訴您,而不是返回更大的檔案。

常見問題

Typical screen recordings and phone videos shrink by 50-80%. The compressor re-encodes your video with the H.264 codec at an efficient quality level and downscales resolutions above 1280px wide, which is where most of the savings come from. Videos that were already encoded efficiently (e.g. exported from a modern editor at a sensible bitrate) will shrink less, and the tool will tell you honestly if compression would not help.

No. The entire compression runs inside your browser using WebAssembly — the video never leaves your device. That makes this tool safe for private recordings, internal meetings, and unreleased content, and it means there is no upload time and no file-size billing.

Because the work happens on your own device rather than a server farm. Encoding speed depends on your hardware and the video length — short clips finish in under a minute, while a 10-minute 1080p video can take several minutes. A progress percentage is shown while encoding.

MP4, MOV, WebM, MKV, and AVI files are accepted, up to 200 MB. The output is always an MP4 (H.264 + AAC) with faststart enabled, which plays everywhere: email previews, WhatsApp, Discord, PowerPoint embeds, and every modern browser and phone.

The encoder targets visually transparent quality (CRF 28 with perceptual tuning): side by side on a normal screen, most people cannot tell the difference. Resolution above 1280px wide is downscaled — ideal for sharing, though if you need the original 4K resolution for editing, keep your original file.

Embedded videos are the single biggest cause of oversized presentations — a raw screen recording can add 100+ MB to a deck. Compressing the video first keeps the PPTX small enough to email and quick to open. After embedding, you can also run the deck through our PowerPoint compressor.