✳ FREE, NO UPLOAD
Crop video for X (Twitter)
Scales and center-crops any video to X (Twitter)’s 16:9 or 1:1 frame (1920×1080), entirely in your browser via a WebAssembly build of ffmpeg.
Batch is free and unlimited - files are processed one after another on your device, with no queue or daily cap. Maximum 100 MB per file; the first run loads a ~30 MB engine once per visit.
Frequently asked
What size does X (Twitter) need?
X (Twitter) is built around 16:9 or 1:1. This tool outputs 1920×1080.
Will this stretch or distort my video?
No - the source is scaled to fully cover the target frame, then the excess is cropped from the center, so proportions stay correct.
What format do I get back?
An MP4 file, ready to upload directly.
Koldflux crops, captions and schedules every clip for X (Twitter) automatically - no manual export step.
Automate this in Koldflux