Compress Video to 100 MB
about 3 minutes 19 seconds of comfortable 1080p or 6 minutes at 720p; it can carry roughly 40 seconds of useful 4K
No watermark and no installation. The compressor is preset below 100 MB so normal encoder variation still lands under the limit.
Drag and drop a video file to start
Checking your file limits…
Supported: mp4, webm, mov, mkv, avi, wmv and 33 formats in all
Where 100 MB comes from
Unlike the other five, 100 MB is not a platform’s published cap. It is the round number that forms, content management systems, ticketing tools and internal upload dialogs settle on, because it is comfortably above what most attachments need and comfortably below what would cost real storage. Nobody documents it centrally, which is exactly why people arrive here with the number and no context for it.
No platform we track publishes 100 MB as a limit. Every cap in our verified set is listed on the platform pages, and none of them is 100 MB. If something is enforcing it on you, it is a local rule rather than a published one — which is worth knowing before you compress to it.
How long a video fits in 100 MB
The longest clip each resolution can carry inside 100 MB. “Comfortable” means the bitrate clears what that frame size wants; “watchable” means it is soft but holds together. Both columns are arithmetic on the size and the duration; the thresholds they are compared against are recommendations, documented under the table below.
| Resolution | Comfortable up to | Watchable up to | Needs |
|---|---|---|---|
| 4K | 40s | 67s | 20,000 kbps |
| 1440p | 90s(2 min) | 146s | 9,000 kbps |
| 1080p | 199s(3 min) | 386s | 4,000 kbps |
| 720p | 353s(6 min) | 669s | 2,200 kbps |
| 480p | 728s(12 min) | 1309s | 1,000 kbps |
| 360p | 1129s(19 min) | 1920s | 600 kbps |
Method: 100 MB spread over the duration, minus 128 kbps of audio and 2% container overhead, then compared against H.264 thresholds derived from published bitrate ladders and reduced by about a third for re-encoded source. A minute inside 100 MB leaves 13573 kbps for video, which is exact. Which resolution that is enough for is a recommendation, not a measurement.
What 100 MB buys at each length
The table above reads by resolution; this one reads by duration. Same arithmetic, the other way round — pick your clip length and see what is left to spend.
| Video length | Bitrate left for video | Resolution it carries | Verdict |
|---|---|---|---|
| 1 min | 13,573 kbps | 1440p | Looks fine |
| 2 min | 6,723 kbps | 1080p | Looks fine |
| 5 min | 2,612 kbps | 720p | Looks fine |
| 10 min | 1,242 kbps | 480p | Looks fine |
| 30 min | 329 kbps | 360p | Visibly rough |
| 1 h | 100 kbps | — | Visibly rough |
Method: the bitrate column is arithmetic — 100 MB spread across the duration, minus 128 kbps for stereo audio and 2% for container overhead. It is a hard ceiling, not an estimate. The resolution and verdict columns are a recommendation, derived from published H.264 bitrate ladders and pulled down about a third, because re-encoding footage that has already been compressed once survives lower bitrates than encoding a clean master does. Deliberately conservative — we would rather under-promise than tell you a video will look fine when it will not.
100 MB across lengths and resolutions
The left column is what you have to spend at each length; the cells are what each resolution needs. Green means you clear it comfortably, amber means it is watchable but soft, and grey means pick a smaller frame. Reading down a column shows how long a clip can get before that resolution stops being worthwhile on a 100 MB limit.
Source: Computed, not measured — no encoder was run to produce this figure · Method: 100 MB spread over the duration, minus 128 kbps audio and 2% container overhead. Thresholds come from published H.264 bitrate ladders, reduced by about a third for re-encoded source.
What goes wrong at 100 MB
At this size the constraint usually stops being the cap and starts being the download. 100 MB is a few seconds on a desk connection and a visible wait on a phone, and for anything intended to be watched rather than archived that matters more than fitting the limit. This is also the first size where the resolution question reverses: instead of asking how far down you have to go, ask whether you need 1080p at all — a screen recording at 720p inside 100 MB has enough bitrate to look genuinely clean for six minutes.
How to compress a video to 100 MB
Drop the video in
The compressor is set to 96 MB so the result stays below the 100 MB limit.
Trim long footage first
At 100 MB, duration costs more than any quality setting. Halving the clip doubles the bitrate available to each remaining frame.
Download and inspect difficult frames
Check motion, faces and gradients at full size. These reveal compression damage before a thumbnail does.
100 MB compression FAQs
Can I compress a video to 100 MB?
Yes. Upload the video and use the preset exact-size target.
What quality fits in 100 MB?
Quality depends mainly on duration, motion and resolution; use the tables on this page to choose.
Why target below 100 MB?
Encoders can overshoot slightly, so the preset leaves headroom below a hard ceiling.
Will the result have a watermark?
No. VidSmaller does not add a watermark.
Other target sizes
Not one of these? Work out any size and length in the calculator — same arithmetic, plus what we measured at the bitrate it gives you.