Slimvid

Preset · 100 MB · hard cap

Compress Video to 100MB

100MB is a common maximum on job sites, university portals and CMS widgets. It is also the practical preset on the Instagram and Xiaohongshu pages, where we could not confirm an official consumer cap. WhatsApp’s faster-connection default is 100MB at 720p, which is a separate, documented rule. This page simply holds the file at or under 100MB.

Land at 100MB for forms that say “maximum 100MB” and for large phone uploads.

Drop videos here, or click to browse

Up to 1GB each · MP4, MOV, WebM or MKV

Choose files

Processed locally in your browser. Nothing is uploaded.

Settings

Add a video and the settings for this tool appear here.

How it works

  1. 1Drop your video. 100MB is preselected.
  2. 2Keep the full clip if the estimate looks sharp.
  3. 3Compress and download a file at or under 100MB.

Processed locally in your browser. Nothing is uploaded.

Process videos up to 1GB on your device. Nothing is uploaded.

100MB is the form-field number

When a form says 100MB, guessing a bitrate is a waste. Set the cap and let the duration decide the bitrate.

100MB holds several minutes of 1080p. Use 50MB on a weak connection, or 25MB for consumer email.

Nothing is uploaded to Slimvid. You take the file to the form yourself.

100MB destinations

This page
Hard 100MB cap
WhatsApp, faster connections
100MB at 720p, per WhatsApp help
Many web forms
100MB when the form says so

The WhatsApp 100MB figure is from WhatsApp’s help center and applies to faster connections, with 64MB listed for slower ones. A random form’s 100MB rule is that form’s rule.

Checked 2026-10-10.

What fits in 100 MB

Planning estimate from Slimvid’s size formula: 97% of the byte cap, a small audio reserve, then a lower resolution when the video bitrate would look bad. It is not a measured encode of one clip. Motion, codec and audio change the file.

DurationTotal budgetVideo bitratePicture the planner picks
15 sec51733 kbps51605 kbps1080p
30 sec25867 kbps25739 kbps1080p
1 min12933 kbps12805 kbps1080p
2 min6467 kbps6339 kbps1080p
5 min2587 kbps2459 kbps720p
10 min1293 kbps1165 kbps480p

Three steps

How to compress a video to 100MB

Compress video to 100MB online, free, no upload. A hard 100MB cap for forms and practical social uploads. Encodes on your device.

  1. 1

    Drop your file

    Drop your video. 100MB is preselected.

  2. 2

    Choose settings

    Keep the full clip if the estimate looks sharp.

  3. 3

    Download

    Compress and download a file at or under 100MB.

All compress-video pagesVideo upload limits in 2026

Same job, other limits

Related size and platform pages

Compress Video for InstagramCut a heavy export down to 100MB before you post a Reel, feed clip or Story.For InstagramCompress Video to 50MBHit 50MB for Discord Nitro Basic and for phone uploads that should finish quickly.50MBCompress Video to 25MBLand at or under 25MB for Gmail, Outlook.com and forms that copied the email cap.25MBCompress Video for EmailLand under the 25MB attachment cap so the clip goes through as a file, not a cloud link.For emailCompress Video for XiaohongshuTurn a heavy export into a 100MB file that is easier to post from a phone.For XiaohongshuCompress Video for TikTokTurn a bulky edit into a 50MB file that uploads on cellular without looking mushy.For TikTok

Keep going

Related tools

FAQ

100MB video FAQ

Is 100MB a hard cap?
Yes. The output will not exceed 100MB.
Is this the Instagram page?
Same practical size, different copy. Use the Instagram page if you are posting there. Use this page for a generic 100MB form.
Can I start from 4K?
Yes. To stay under 100MB the output may step down to 1080p, which is what most of those forms play.

Desktop · Coming soon

Desktop · Coming soon

The desktop app is in development. Join the waitlist for launch updates.

Get early accessCompare web vs desktop
  • No file size limit — 4K, hour-long recordings, anything
  • Batch queues: drop a folder, apply one preset
  • Hardware-accelerated encoding (H.264 / H.265)
  • Works fully offline, same privacy guarantee