Compress a video to 10 MB

Where you meet a 10 MB limit

GitHub accepts videos of up to 10 MB in issues, pull requests and comments when the repository belongs to a user or organization on a free plan, and up to 100 MB on a paid plan. It takes MP4, MOV and WebM files and recommends H.264, because which video codecs play depends on the browser (GitHub Docs). This tool always writes H.264 in an MP4.

In classic Outlook for Windows with a Microsoft Exchange Server mailbox, the default ceiling is 10 MB for all the attachments on a message together. It comes from the Maximum send size an Exchange administrator sets, so your workplace may allow more or less (Microsoft Learn).

Discord's free upload limit was 10 MB until August 2026, when it rose to 20 MB (Discord Support). Plenty of older guides still say 10. A 10 MB clip uploads either way, and the Discord page starts at the newer 20 MB.

Microsoft writes its 10 MB as 10,240 KB, and this tool counts 1 MB as 1,000,000 bytes, the smaller of the two ways to count. So a file made here for 10 MB stays under a 10 MB limit however the other side counts it.

What 10 MB holds at each length

At 10 MB, the length of the video decides almost everything. The whole budget goes to the video you choose, so a short clip keeps full HD and a long one gets a smaller picture. This is what Auto chooses for a typical 1080p phone video at 30 frames per second with AAC sound:

Clean here means Auto's own bar of about 0.05 bits for every pixel of every frame. Detailed or fast scenes show the squeeze sooner than a talking head. A 60 fps clip keeps 60 fps while it fits: at 30 seconds Auto keeps 720p at 60 fps, and at 45 seconds it switches to 30 fps rather than shrink the picture. Removing the sound hands its 128 kbps to the picture, so a 2-minute video comes out at 480p instead of 360p.

Screen recordings for a bug report

A recording that shows a bug only has to be readable. Keep just the steps that reproduce it with Compress only part of the video: 20 seconds of a 1080p screen keeps full HD at 10 MB, while three minutes would shrink it to 240p, too small to read a menu.

If nobody talks over the recording, tick Remove the sound so the picture gets those bits too. A screen recorded at 60 frames per second can usually drop to 30 without losing anything a bug report needs, and Auto does that on its own when it helps.

On a public repository, attached files can be opened without signing in (GitHub Docs). The MP4 from this tool carries no recording date, place or device name, but it shows everything that was on the screen, so look for names, email addresses and keys before you post it.

Tips for fitting under 10 MB

Cut first, then compress. Every second you drop leaves more bits for the rest, and a shorter video is the one change that costs no picture quality at all.

Choose the picture size yourself when detail matters more than smooth motion. For a one-minute clip Auto picks 540p; set Picture size to 720p and the panel tells you that fast motion may look a little soft, which is often fine for slides or a screen.

Aim lower when the limit covers more than the video. An Exchange mailbox counts every attachment on the message, so a 10 MB video next to a 1 MB document needs 9 MB, which you can type straight into the size box.

When 10 MB is too small

Beyond about 5 minutes with sound, a 10 MB picture turns soft and blocky and the panel warns you; at around 10 minutes the tool refuses and names the smallest size that works. You then have three ways out: keep a shorter part, remove the sound, or send the video somewhere with a higher limit.

GitHub takes up to 100 MB for each video on a paid plan, Discord takes 20 MB without Nitro, and a personal Gmail account takes 25 MB of attachments: see compress a video to 25 MB. To send a long video in pieces, split it with the cut video tool, which copies the video without re-encoding it, then bring each piece here.