Slack's free plan limits total file storage to 5 GB per workspace and caps individual file uploads at 1 GB. Paid plans raise these limits, but large video files slow uploads, clog workspace storage, and create large downloads for teammates. Compressing to H.264 MP4 at 720p produces files that play inline in Slack, upload in seconds, and use a fraction of the storage of raw recordings.
Prepare a Slack-ready H.264 MP4 at 720p — inline playback, fast upload.
Slack allows individual file uploads up to 1 GB. However, Slack's free tier has a 5 GB workspace storage cap shared across all files. Compressing videos to H.264 720p significantly extends your usable storage.
Slack plays MP4, MOV, and WebM inline in the desktop and mobile apps. MP4 with H.264 is the most universally supported format and produces the most consistent inline playback experience across all Slack clients.
Compress to H.264 MP4 at 720p before uploading. A 5-minute 720p H.264 video is typically 100–200 MB — much more storage-efficient than a raw 4K or ProRes clip.
Slack does not re-compress video — it stores and serves files as uploaded. A pre-compressed H.264 MP4 uploaded to Slack is delivered exactly as you encoded it.
Yes. Screen recording tools typically output MP4 files. If the file is too large, run it through this encoder at 720p to reduce size while keeping text and UI elements sharp and readable.
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