How to Compress a Video to 5MB (Free, Browser-Based, 2026)
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Quick Answer
Compressing a video to 5MB is extreme compression. The key levers: resolution (the biggest impact), bitrate, and duration. A 30-second clip at 480p/1000kbps H.264 is approximately 3.75MB. At 720p/1000kbps, 20 seconds is ~2.5MB. For 5MB, plan for: under 60 seconds at 480p, or under 30 seconds at 720p. If duration cannot be reduced, 480p/1000kbps is the practical target.
Step-by-step
- 1
Upload your video to FileCurve Video Compressor.
- 2
Trim the video to the essential content — duration is the biggest lever for hitting 5MB.
- 3
Set resolution: 480p (854×480px) for up to 40 seconds, or 360p (640×360px) for up to 60 seconds.
- 4
Set bitrate: 800–1000kbps. Lower = smaller file, lower quality.
- 5
Codec: H.264 (broadest compatibility, even for MMS/old portals).
- 6
Audio: AAC 64kbps mono (saves ~50% vs stereo — voice is fully intelligible).
- 7
Check output size. Adjust bitrate to 600kbps if still above 5MB.
Expected output
Format
MP4, H.264
Quality setting
480p at 800–1000kbps — acceptable for short mobile clips
Estimated size
30-sec clip: 3–4MB / 60-sec clip: 5–7MB at 480p/800kbps
Why you might need this
- →MMS video messages on carriers with 1–5MB limits
- →Legacy email servers with 5MB attachment caps
- →Old corporate portals with video submission caps from the early 2010s
- →Video evidence for small claims courts that use outdated file upload portals
Troubleshooting
Video quality is very poor at 5MB
At 5MB for a 60-second clip, you are at 667kbps — low but watchable at 480p. For better quality, keep the clip under 30 seconds so you can use 1500kbps.
MMS limit on my carrier is 3MB, not 5MB
US MMS carriers typically limit to 1–3MB. Drop to 360p at 500kbps and trim to 20 seconds. MMS is not designed for video — consider sending via iMessage (200MB limit) or WhatsApp instead.
Old company portal only accepts videos under 5MB
This portal is likely only accepting short clips. Trim to 30 seconds max and use 480p/1000kbps H.264.
Audio is out of sync at very low bitrate
Ensure audio bitrate is explicit (64kbps AAC), not "auto". Some encoders at very low bitrate drop audio frames unpredictably — set explicitly.
Frequently asked questions
How long can a video be at 5MB?
At 480p/800kbps: ~50 seconds. At 720p/1000kbps: ~35 seconds. At 480p/500kbps: ~80 seconds (very low quality). Duration and resolution are the two main levers.
Is 5MB video quality usable?
For short clips at 480p: yes, fully watchable. For any clip over 60 seconds: quality becomes marginal below 5MB at 480p. Set expectations — 5MB is MMS-tier video, not YouTube quality.
Can I compress a 4K video to 5MB?
Yes — but only if it is under 30 seconds. 4K will be downscaled to 480p in the process. Resolution is determined by the target bitrate, not the source.
What is the MMS video size limit?
Varies by carrier: AT&T 1MB, Verizon 3.5MB, T-Mobile 1MB, Sprint 1MB (US). Most carriers are 1–3MB for MMS video. For reliable sharing, use iMessage, WhatsApp, or Telegram instead.