减小电子邮件的 MP4 视频大小

Compress large MP4 files to fit within the 25MB email attachment limit. Free, instant, and fully local processing.

拖放文件或 浏览文件

减小电子邮件的 MP4 视频大小

压缩设置

选择压缩目标。 较低的质量意味着较小的文件大小。

质量: 60%
极限尺寸均衡高质量
Gmail / Outlook
25
500MB
Before
18MB
After ✓
Email-Ready Compression

减小电子邮件的 MP4 视频大小

Compress large MP4 files to fit within the 25MB email attachment limit. Free, instant, and fully local processing.

Under 25MB
No Upload Needed
Gmail & Outlook Ready

How to Compress Videos for Email Attachments

1
1

Check the Limit

Most email providers like Gmail and Outlook restrict attachments to 25MB. Ensure your target size is below this limit.

2
2

Adjust Quality Slider

Drop the quality slider to around 40-50% to achieve maximum compression without making the video unwatchable.

3
3

Download and Attach

Save the optimized MP4 directly to your device and drag it into your email composer.

Stop Getting "File Too Large" Errors

Every email provider imposes strict size limits. Compress your video privately in your browser before sending — no cloud storage required.

Gmail 25MB attachment limit
Outlook 20MB attachment limit
Yahoo Mail 25MB limit

Your Video Never Leaves Your Device

Unlike cloud-based compressors, we process everything inside your browser using WebAssembly.

WebAssembly Powered

Compress a 500MB Video in Under a Minute

Our engine uses native WebAssembly FFmpeg. No cloud round-trips. Hardware-level speed, right on your CPU.

Zero Upload Latency
GPU-Accelerated Encoding
No App Installation

常见问题解答

Gmail 将附件大小限制为 25MB。 如果您的视频较大，您必须先使用我们的工具对其进行压缩。
是的，对于通过电子邮件进行的休闲共享，显着降低比特率仍然可以提供高度可接受的观看体验。
绝对地。 我们的 WebAssembly 引擎在 iOS 和 Android 浏览器上本地运行，非常适合移动电子邮件。