Letterbox Video Online

Your files are processed locally in your browser — nothing is uploaded to our servers.

Fit video into 16:9, 9:16, or square with colored bars.

Drop a video here or click to browse

Supports MP4, MOV, WebM, MKV, AVI, MPEG, 3GP, OGV, WMV, FLV, TS, and more — processed locally in your browser. Large files use more memory.

Upload a video to preview it here

Pick target aspect.

Target aspect

Output width

Bar color

Output format

About this tool