Compress MP4 to 25MB
Gmail and Outlook reject attachments over 25MB — the Email 25MB preset is preselected, so your video lands in the inbox, not a bounce message.
or drop files here
Maximum file size: 500MB per file
Browser-native Supported Formats
To keep quality and compatibility stable in browser-side compression, only MP4 and WebM are supported at the moment.
Supported input: MP4, WebM
Supported output: MP4, WebM
Not supported for now: MOV, AVI, MKV, FLV
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About 25MB Video Compression for Email
Gmail caps attachments at 25MB (the same limit applies to most providers like Outlook and Yahoo), and files close to the cap can still fail on stricter receivers. This tool re-encodes your video in the browser until it fits comfortably under 25MB, keeping as much quality as the budget allows. Everything runs locally — the video is never uploaded. Whether you are optimizing assets for a US-hosted site on AWS, Cloudflare, or Vercel, trimming email attachments for Gmail and Outlook, or submitting documents to federal portals, this tool keeps your files lean and your workflow fast — all without uploading anything to a server.
How to Compress a Video to 8MB, 25MB, or Any Size
Add your video
Drop in the MP4, WebM or MOV file you want to attach.
Keep the Email 25MB preset
It is preselected for Gmail, Outlook and most providers. Switch to Custom for a stricter cap.
Compress and attach
Download the result and add it to your email — it now sends without errors.
Frequently Asked Questions
What is Gmail’s attachment size limit?
Gmail allows up to 25MB per email across all attachments. Outlook.com and Yahoo use the same 25MB cap, while some corporate servers accept only 10–20MB.
Why compress below 25MB instead of right at it?
Email encoding adds a few percent of overhead, and stricter receiving servers may reject anything near the cap. Aiming for 24MB or less avoids bounced messages.
How long can a 25MB video be?
Typically 10–20 minutes at 480p or 3–5 minutes at 720p, depending on scene complexity. The compressor maximizes quality within the size budget.
My video is still too big. What else can I do?
Compress to 10MB with the Discord preset, split the clip, or upload to a cloud drive and share the link instead of attaching the file.