Prepare a smaller video for a Bluesky post without confusing file size with video length.
Start with a target above, or open Full controls for a custom maximum and video settings.
Choose a local file. Review the selected maximum, any resolution cap and the advice before compressing.
Save the result and check its quality. Upload or attach it in your destination app yourself.
The official Bluesky app source currently defines a 300 MB video size ceiling. The 100 MB preset is a smaller alternative, not a claim that the older limit still applies. App versions and service policies can change independently.
A smaller file will not shorten a video. If Bluesky rejects its duration, trim it in an editor before compression. Download the MP4 here and add it to your post yourself; this tool does not publish to Bluesky.
It gives you a smaller file for uploading and sharing. Choose the 300 MB ceiling if your clip needs more detail and your SizeVideo plan supports it.
No. Duration, app availability and service-side processing can also cause a rejection. Test the downloaded MP4 and read the error in Bluesky.
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.
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.