How to use the Compress Video to 100MB tool
- Choose your video, or drag it onto the box.
- Pick a quality level, or switch to "Target size" and type the size you need.
- Press Compress video and wait for the progress bar to finish.
- Compare the before and after sizes, preview the result and download it.
About this tool
A file size limit is really a bitrate budget: 100 MB of storage spread over the length of your video. The table below shows what that budget looks like for different lengths. Short videos fit 100 MB with plenty of room to spare; long videos need a much lower bitrate and a lower resolution.
When you press Compress, the tool encodes your video and checks the result. If it lands over the limit, it lowers the bitrate and tries again (up to a few passes), so you get a file that is actually under 100 MB rather than an estimate. If your video is already smaller than 100 MB, it tells you and gives your original back.
Where a 100 MB limit shows up
Client portals, GitHub uploads on paid plans (100 MB for video), LMS platforms and file-sharing links where 100 MB is a common ceiling.
- You can usually keep 1080p for clips up to about 5 minutes.
- Use this size when quality matters and the limit is generous.
- For a 20 minute recording, 720p at this size still looks clean.
What does 100 MB look like?
Approximate total bitrate (video plus audio) available for a 100 MB file:
| Video length | Total bitrate | What to expect |
|---|---|---|
| 30 sec | 27,962 kbps | 1080p looks great |
| 1 min | 13,981 kbps | 1080p looks great |
| 2 min | 6,991 kbps | 1080p looks great |
| 5 min | 2,796 kbps | 1080p or 720p, good |
| 10 min | 1,398 kbps | 720p, fine |
| 30 min | 466 kbps | 360p, soft |
As a rule of thumb, 1080p needs about 3,500 kbps or more, 720p about 1,500 to 2,500 kbps, and 480p about 700 to 1,000 kbps to look clean.
Why use ToolsCrow for this
- Hits the target. Verified by measuring the result and retrying.
- Automatic resolution. Scales down only when the budget requires it.
- Private. Nothing is uploaded.
- No watermark. Free.
Good to know
- Long videos at 100 MB will look soft. If quality matters more than the limit, split the video into parts with Split Video.
- The result can land a little under the target, not exactly on it.
Frequently asked questions
Is my video uploaded to a server?
No. Everything runs inside your browser tab using your own device's video hardware. Your file is never sent to ToolsCrow or anyone else, which also means there is no waiting for an upload and it keeps working if your connection drops after the page has loaded.
Is it really free? Is there a watermark?
It is free with no sign-up, no watermark and no daily limits. The only limits are the ones your device sets: memory and processing power.
How large a video can I use?
Because the video is processed on your device, the limit is your device's memory rather than a server quota. Phone clips of several hundred MB are fine on most devices, and desktop computers usually handle 1 to 2 GB. Files over about 4 GB are not supported.
Which browsers work best?
Current Chrome, Edge and Safari (16.4 or newer, including iPhone and iPad) work best because they include the WebCodecs video engine. Recent Firefox versions work for many files. Older browsers fall back to a much slower real-time mode or may not work at all.
Can I compress a 10-minute video to 100 MB?
Usually yes, with a lower resolution. 100 MB over 10 minutes is about 1398 kbps in total, which gives an acceptable 480p to 720p picture.
Why is my file a bit smaller than the target?
Video encoders cannot hit an exact size, so the tool aims just under it to make sure it never goes over.
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