Does X (Twitter) support MOV files?
Apple's QuickTime container - the default export from iPhone camera rolls and Final Cut Pro
Yes in X Media Studio - MOV support in other X upload surfaces is not established here.
Media Studio lists MP4 and MOV with H.264 video and AAC audio. Its documentation explicitly says these rules do not cover ordinary desktop, mobile or API uploads. If your MOV fails in a different composer, test an H.264 MP4 copy; do not treat Studio support as a universal guarantee.
Recommended upload: MP4 with H264. MOV is not the platform's documented upload container; export as MP4 with H264 video for the safest upload.
Convert MOV to MP4 →Source: X Media Studio Library. Media Studio only; not a specification for native app, web or API uploads. Checked 2026-09-12.
Frequently asked
Does X (Twitter) support MOV?
Yes in X Media Studio - MOV support in other X upload surfaces is not established here. Media Studio lists MP4 and MOV with H.264 video and AAC audio. Its documentation explicitly says these rules do not cover ordinary desktop, mobile or API uploads. If your MOV fails in a different composer, test an H.264 MP4 copy; do not treat Studio support as a universal guarantee.
What format should I convert MOV to for X (Twitter)?
MP4 - a widely supported video container; acceptance also depends on the video and audio codecs inside it. Converting MOV to MP4 runs entirely in your browser with the converter linked below.
How do I check whether my MOV file will upload cleanly to X (Twitter)?
Open the Koldflux File Doctor, drop in the file, and pick X (Twitter). It reads the container, codec, resolution, duration and file size locally and reports pass / warn / fail against the documented X (Twitter) constraints.