動画压缩

缩小大型動画便于分享。

ここにファイルをドラッグ&ドロップ

Up to 2GB · 5 files / batch

MP4, MOV, WebM, MKV, AVI, GIF.

Preparing encoder0%

How it works

添加大片段并调质量。ローカル重编码。 该工具需要首次一次性ダウンロードローカル处理引擎(Web Worker)。根据网速可能需要片刻、但可确保零服务器アップロード与完全隐私。

Features

  • Browser-native processing

    Conversions run in your tab with JavaScript — no desktop app required.

  • Zero server uploads

    Files stay on your device during processing. We do not receive your uploads.

  • WebAssembly when needed

    Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).

FAQ

How it works

添加大片段并调质量。ローカル重编码。 该工具需要首次一次性ダウンロードローカル处理引擎(Web Worker)。根据网速可能需要片刻、但可确保零服务器アップロード与完全隐私。

What are the limitations?

高压缩会产生伪影。 处理 100% 在ブラウザ内オフラインで行われます——ファイルから出ることはありません您的设备。

Is this tool free to use?

Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.

Will I lose quality?

You control quality settings. Choose higher quality for no quality loss when converting online.

100% browser-based & private

Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.

Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.

When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.

MP4からWebM — related tool tools mp4-to-webm

用质量滑块MP4 を WebM。

MP4WEBM
GIFからWebM — related tool tools gif-to-webm

GIF をコンパクトな循环 WebM。

GIFWEBM
GIFからMP4 — related tool tools gif-to-mp4

将动画 GIF を更小的 MP4。

GIFMP4
MKVからMP4 — related tool tools mkv-to-mp4

在ブラウザ中MKV を MP4。

MKVMP4