Compress Video for Instagram

Not really a binding one for most people — Instagram accepts video uploads up to roughly 4GB (lower for very long videos). Instagram's own compression, not the size cap, is what actually determines your final quality: it re-encodes every video you upload, typically down to around 3.5 Mbps bitrate.

Because Instagram re-encodes whatever you give it. Upload a video with a very high bitrate (raw camera footage, an un-compressed screen recording) and Instagram compresses it aggressively in one pass, which tends to introduce more visible artifacts than if you'd handed it a moderately-compressed file to begin with. Pre-compressing to a reasonable bitrate and the right resolution gives Instagram less destructive work to do.

1080×1920 (9:16 vertical) is the standard for Reels and Stories, and also works well for feed video. This tool defaults to a 1080p resolution cap, which fits that target on the long edge.

Upload your video above — it's already set to "Quality" mode with a 1080p resolution cap and a balanced quality setting, tuned to avoid over-compressing before Instagram does its own pass. Click Compress and download the result, then upload it to Instagram as usual.

No — target-size mode is built for a hard upload cap like Discord's 20MB or email's 25MB. Instagram doesn't have one of those; its real constraint is bitrate and resolution, which is what Quality mode controls. Forcing a small MB target on an Instagram video would just waste quality for no reason, since Instagram's cap is nowhere near that tight.

No — Instagram always re-encodes every upload; there's no way to fully skip that. The goal here is giving it a source that's already close to its own target bitrate and resolution, so its re-encode has less quality to throw away, not eliminating Instagram's re-encode step entirely.