VidCompress / Slack share
Slack allows 1 GB but free workspaces share a capped storage pool. Compress to ~25 MB to keep channels fast and storage free.
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Slack accepts files up to 1 GB, so the limit is rarely the problem — storage and speed are. Free Slack workspaces share a capped storage pool, and big videos burn through it fast while also taking longer to upload and download for everyone in the channel. Compressing a clip before you share it keeps the channel snappy and your storage from filling up.
This page targets the Email preset (≤25 MB), a sensible size for a Slack message. For files under 300 MB the work happens in your browser, so internal recordings and screen captures stay on your device.
Quick reference
Keep the Email preset
It targets about 25 MB — small enough to upload instantly and easy on a shared workspace's storage.
Add your video
Drop in your screen recording or clip. All common formats are accepted; output is MP4 for inline playback in Slack.
Compress
VidCompress reduces the file while keeping it clearly watchable for a demo or walkthrough.
Share in Slack
Save the file and drag it into your channel or DM. It uploads fast and plays inline.
What is the Slack file size limit?
Slack allows up to 1 GB per file. The catch is storage: free workspaces share a capped pool, so large videos eat into it quickly. Compressing keeps uploads fast and storage usage low.
Why should I compress a video before posting it to Slack?
Smaller files upload and download faster for everyone in the channel and use far less of a free workspace's shared storage. A 25 MB clip is plenty for most demos and walkthroughs.
How do I compress a screen recording for Slack?
Drop the recording into the Email preset on this page. It targets 25 MB and outputs MP4, which plays inline in Slack.
Do I need to install anything?
No. Compression runs in your browser; files under 300 MB stay on your device.
Is it free?
Yes. The free plan compresses up to 300 MB locally with no signup or watermark.