How to Compress a Video for WhatsApp, E-mail or Discord: Size, Length and Resolution

Updated November 3, 2026

A minute of phone video is often 100 MB or more, and WhatsApp, e-mail and Discord refuse files that big. Compressing makes it fit — and how good it still looks depends on one thing above all: how long the video is. Here is the sum, a table for WhatsApp's 16 MB and what to change when the result looks blurry.

1. The limits

WhatsApp: about 16 MB for a video sent as a normal video, the kind that plays in the chat. A bigger file can go as a document (up to 2 GB): it keeps the quality, but the other person has to download it before watching.
E-mail: most services stop at 20 to 25 MB per message (Gmail: 25 MB; above that it sends a Drive link instead).
Discord: 10 MB per file on a free account.

2. Size = bitrate × length

A video file is the number of bits per second (the bitrate) times its length. Turned around: bits per second available = size in MB × 1,048,576 × 8 ÷ seconds. The compressor keeps about 4% of that for the file's container and takes the sound out of what is left (192 kbps by default); the rest is for the picture.

That is why the same 16 MB gives a sharp 30-second clip and a blurry 5-minute one: the picture of the long video has about 17 times fewer bits per second.

3. What fits in 16 MB (WhatsApp)

Picture bitrate left in 16 MB with the sound at 192 kbps, and the largest resolution that still looks good with it:

Length	Picture bitrate	Best resolution
30 s	4.10 Mbps	1080p
1 min	1.96 Mbps	720p
1 min 30 s	1.24 Mbps	480p
2 min	882 kbps	480p
3 min	524 kbps	360p
5 min	237 kbps	blurry even at 360p — cut it

The rule of thumb behind the last column (30 frames per second, medium quality): 1080p needs about 3.7 Mbps, 720p about 1.7 Mbps, 480p about 0.74 Mbps and 360p about 0.41 Mbps.

Below 150 kbps the picture breaks into blocks, so the tool says the goal is too small: with 192 kbps of sound, 16 MB holds at most 6 min 16 s of video. Other goals: e-mail's 25 MB gives a 2-minute video 1.49 Mbps and holds up to 9 min 48 s; Discord's 10 MB gives a 1-minute video 1.15 Mbps and holds up to 3 min 55 s.

4. Why a smaller resolution looks sharper

With few bits, a full HD picture has to share them among 2 million pixels per frame, and the encoder smears the detail. At 720p there are less than half as many pixels, so each gets more bits and edges stay clean. On a phone screen, a clean 720p looks better than a smudged 1080p.

5. Getting more out of the same size

Cut first. Every second you remove leaves more bits for the rest: a 2-minute video cut to 1 minute goes from 882 kbps to 1.96 Mbps.
Lighter sound. Choosing 128 kbps instead of 192 gives the picture 64 kbps more; for speech it is hard to hear the difference.
No sound. If the sound does not matter, removing it gives the whole size to the picture — without sound, 16 MB holds up to 14 min 18 s.
The tool never raises the bitrate above the original's, so a video that is already small is not made bigger.

Compress your video

In the video compressor, drop the video and keep WhatsApp (16 MB) or choose e-mail, Discord or your own size in MB: it shows the expected size before you export an MP4 that plays everywhere. The video is processed by your browser and never leaves your device.

The limits of WhatsApp, e-mail services and Discord can change; the bitrates in this guide come from the same sum the tool uses.

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