AUTO-DETECT LETTERBOX BARS

Remove Black Bars From Video Online

Upload a video with letterboxing or pillarboxing. VideoHop analyzes the picture boundaries, detects persistent black borders and crops them without stretching the active image.

✓ Automatic crop detection✓ No stretching✓ Existing audio preserved

✓ No account required✓ Live progress✓ Automatic cleanup

Converter readyUp to 400 MB per request • 250 MB per file

250 MB per file400 MB per request45 min max video~30 min auto-delete

Drop video files here or click to browse from your device No files selected MP4, MOV, MKV, AVI, WebM, MP3, WAV, FLAC, M4A, AAC, OGG, OPUS + more

Convert to Recommended MP4 is recommended for broad video compatibility.

Output quality

Highlarger file Balancedrecommended Smallermore compression

Smart output: MP4Best overall compatibility for video playback and sharing.

Size depends on source

Advanced settingsFine-tune the output

Maximum resolutionNever intentionally upscales; server limit: 1080p. Audio bitrateUsed by compressed audio outputs and video audio tracks. Sample rate48 kHz is common for video production. Output filename

.mp4

Available for single-file conversion. Trim startOptional HH:MM:SS or seconds. Trim endLeave blank to convert to the end. Remove audioCreate silent video output.

✓ Format-aware settings✓ Live queue progress✓ Files expire after ~30 min

WHY USE THIS TOOL

Crop persistent borders without guessing dimensions

The tool performs a detection pass before encoding, so the crop rectangle comes from the uploaded video rather than a fixed preset.

Letterbox removal

Detect black bands above and below widescreen footage stored inside a taller frame.

Pillarbox removal

Detect persistent black borders on the left and right when narrower footage sits inside a wider frame.

Safe fallback

If a reliable border crop is not detected, VideoHop keeps the original picture dimensions instead of forcing a crop.

HOW IT WORKS

How to remove black bars from a video

1
Upload your video
Choose a supported video containing black borders.
2
Let VideoHop analyze the frame
FFmpeg samples the video and determines the most consistent crop rectangle.
3
Download the cleaned MP4
The detected border crop is applied while the video is encoded.

Good to know

Automatic detection is designed for persistent black borders. Dark objects or temporary black scenes are not treated as borders unless the analysis finds a consistent crop.

RELATED TOOLS

More Ways to Work With Your Media

Use a focused tool when you know the task, or open the universal converter for full format control.

QUICK ANSWERS

Remove Black Bars From Video FAQ

Does this stretch the video?

No. The tool crops detected border pixels rather than stretching the active picture.

What happens if no black bars are detected?

The video is exported without forcing an automatic crop.

Is the audio preserved?

Yes. Existing audio remains when the uploaded video contains an audio stream.