Files are not Slack clips
Slack documents files up to 1 GB. This preset refers to an uploaded file, not the separate recording or clip feature. Workspace policies and Slack Connect restrictions can still prevent an attachment.
Video compressor
Choose your target
Checking your clips…
Drop a video here
How to make your video smaller
- Choose a preset
Start with a target above, or open Full controls for a custom maximum and video settings.
- Select your video
Choose a local file. Review the selected maximum, any resolution cap and the advice before compressing.
- Download and review
Save the result and check its quality. Upload or attach it in your destination app yourself.
Make screen text readable
For a screen recording, try keeping the original resolution and reduce unnecessary footage in an editor first. Test menus and small text in the compressed copy. A very small target may suit a talking-head update better than a detailed software walkthrough.
Questions about Slack
Does a paid Slack plan change SizeVideo limits?
No. Encoding above a 200 MB maximum requires SizeVideo Premium regardless of your Slack plan.
Can compression bypass a workspace upload restriction?
No. Ask your workspace administrator if file sharing is disabled. SizeVideo changes a file, not Slack permissions.
Can I change a preset?
Yes. Full controls opens the normal size ruler, custom maximum, resolution, frame rate and audio settings. Switching controls keeps the selected file. Presets set a maximum; the actual result can be smaller.
Will every video reach this size?
No. Very small targets can be unsuitable or fail for a long or detailed clip. Read the advice, try lower resolution or choose a larger maximum. Compression does not trim video or bypass a destination’s content and account rules.