Video File Size Limits for Email and Social Apps

A video can look perfectly normal on your phone and still fail when you try to send it. Email clients, chat apps, and social platforms all have different file size limits, and some platforms compress uploads again after you send them.

If you already know the target, start with the video compressor or pick a focused page such as compress video to 25MB, compress video to 50MB, or compress video to 500MB.

Email attachment limits

Common safe targets:

Gmail: keep direct attachments below 25MB. Use compress video for Gmail when you want to avoid sending only a Drive link.
Outlook / Hotmail: 20MB is the safest practical target across accounts.
iCloud Mail: aim below 20MB unless you want Mail Drop to create a hosted download link.
General business email: 10MB to 20MB is safer than pushing the maximum.

For email, the best workflow is usually to compress to a specific size target instead of guessing. The email video compressor is built around that use case.

Messaging app limits

Messaging apps often care about both file size and playback experience:

WhatsApp: smaller files send faster and are easier for recipients on mobile data. Try the WhatsApp video compressor or compress video for WhatsApp Status.
Discord: free uploads need a smaller target than Nitro uploads. Use the Discord video compressor or compress video to 25MB.
Telegram: the limit is more generous, but a lighter MP4 is still faster to upload and download. Use the Telegram video compressor.
iMessage: smaller files are more reliable across network conditions. Use compress video for iMessage.

Social platform upload limits

Social platforms may accept large files, but that does not mean large is better. A huge upload can take longer, fail on mobile networks, or get aggressively recompressed by the platform.

Use the platform-specific workflow when possible:

How to choose the right target size

Use this rule of thumb:

If the platform has a hard limit, aim 5% to 10% below it.
If the video is for mobile chat, prefer a smaller file over maximum quality.
If the video contains text or UI, reduce bitrate before reducing resolution.
If the upload keeps failing, export a smaller MP4 instead of retrying the same file.

FAQ

Why should I aim below the exact file limit?

Some platforms calculate file size differently or add upload overhead. Leaving a small buffer helps avoid failed uploads.

What is the best format for email and chat?

MP4 is the safest default because it works across phones, browsers, email clients, and most social apps.

Can I compress to an exact file size online?

Yes. OnlineCompress includes target-size pages such as compress video to 8MB, compress video to 25MB, and compress video to 100MB.