✳ FREE, NO UPLOAD
Convert video to 21:9
Ultrawide cinematic - used for trailers and letterboxed film looks. Output is 2560×1080, cropped from the center so nothing is distorted.
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 is a 21:9 aspect ratio?
Ultrawide cinematic - used for trailers and letterboxed film looks. At standard quality that is 2560×1080 pixels.
Will my footage be stretched?
No - the source is scaled to cover the target frame and the excess is cropped from the center, so proportions are preserved.
Koldflux reframes one source recording into every ratio you publish in, automatically.
Automate this in Koldflux