# Compress MP4 to 5 MB

> Compress an MP4 video to 5 MB or less for email attachments and forms that cap videos at 5 MB. Runs in your browser, so your files never leave your device. Free, no sign-up, no watermark.

URL: https://www.converterrr.com/compress-mp4-to-5mb

Shrink an MP4 to 5 MB or less for email attachments and forms that cap videos at 5 MB.

API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "5mb"` (paid plans).

## How to compress an MP4 to 5 MB

1. **Add your MP4.** Drop one or more MP4 files onto the compressor above, paste them, or click to browse.
2. **5 MB is preset.** The target is already set to 5 MB, and each file is compressed to land at or just under it. You can switch to another size or a percentage to reduce by.
3. **Compress.** Click Compress. The MP4 is processed in your browser; nothing is uploaded.
4. **Check and download.** Check the new size, then download each file or all of them as a ZIP.

## Good to know

- 5 MB suits clips of up to a minute or so; anything longer gets low resolution, so trim it first if you can.
- For a 1-minute clip, 5 MB leaves about 667 kbps for video and audio together (480p); a 3-minute clip gets 222 kbps (240p, low quality).
- 5 MB here means 5,000,000 bytes, a little under the 5,242,880 bytes some sites mean by 5 MB, so the result fits either way.
- MP4 compression runs entirely in your browser with WebAssembly, so nothing is uploaded and your files never leave your device.

## What fits in 5 MB

A 5 MB file has a fixed bit budget, so the longer the clip, the lower the bitrate and resolution it can have.

| Clip length | Video + audio bitrate | Realistic quality |
| --- | --- | --- |
| 15 s | 2.7 Mbps | 1080p or 720p |
| 30 s | 1.3 Mbps | 720p |
| 1 min | 667 kbps | 480p |
| 2 min | 333 kbps | 360p, fine on a phone |
| 5 min | 133 kbps | Too low: trim the clip |

_Rough guide for H.264-class video. Static scenes and screen recordings look better than fast action at the same bitrate._

## What 5 MB is typically for

- Short clips attached to emails
- Video uploads on forms and support tickets
- Previews and teasers

Limits vary by site and change over time; check the exact number where you're uploading.

## How MP4 gets smaller

Re-encodes the video at a lower bitrate (and resolution on Strong); audio is re-encoded to AAC.

[Compress MP4 by quality level instead](https://www.converterrr.com/compress-mp4)

## Neighbouring sizes

- [Compress MP4 to 10 MB](https://www.converterrr.com/compress-mp4-to-10mb): 10 MB upload limits
- [Compress MP4 to 25 MB](https://www.converterrr.com/compress-mp4-to-25mb): Email attachments

## MP4 to 5 MB: frequently asked questions

### How do I compress an MP4 to 5 MB?

Drop the MP4 onto the compressor above. The 5 MB target is already set, so just click Compress and download the result.

### Will the file be exactly 5 MB?

It aims to land at or just under 5 MB. 5 MB here means 5,000,000 bytes, so it also fits sites that count 1 MB as 1,048,576 bytes.

### How much quality will I lose at 5 MB?

5 MB suits clips of up to a minute or so; anything longer gets low resolution, so trim it first if you can. For a 1-minute clip, 5 MB leaves about 667 kbps for video and audio together (480p); a 3-minute clip gets 222 kbps (240p, low quality).

### My MP4 is already smaller than 5 MB. What now?

Then it already fits, and compressing it further would only cost quality. Upload it as it is, or pick a smaller target if you need it smaller still.

### What if my MP4 can't get down to 5 MB?

If a video is too long for 5 MB, the quality would drop too far. Trim it to the part you need, or pick a larger size.

### What is 5 MB typically needed for?

Common reasons: short clips attached to emails; video uploads on forms and support tickets; previews and teasers. Limits vary by site, so check the exact number where you're uploading.

### Is my MP4 private?

Yes. It's compressed inside your browser and never uploaded.