offlinewebtools.com browser-local workbench
Auto Crop Video
Automatically detect and remove black bars from video edges for a cleaner, full-frame viewing experience.
Files are processed locally in your browser using WebAssembly. This input is required.
Saved FFmpeg presets (stored locally)
Preview and export
Inspect the source before running FFmpeg, then preview the generated output before downloading.
Expected output
The generated file preview, size, type, and download action appear here after processing.
0×0px
Keep important subjects away from the outer area while moving or resizing the frame.
How Auto Crop Works
This tool automatically detects black or empty borders around your video and removes them. It works best with solid black borders from letterboxing or pillarboxing.
What this tool does
Auto Crop Video helps you automatically detect and remove black bars from video edges for a cleaner, full-frame viewing experience.
What you get
Auto Crop Video produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.
Report a bug
If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.