Crop H264 Video Online - Free Tool
Crop H264 video in-browser to remove borders, fix aspect ratio, or focus on a subject area before export.
Drop a video here or browse (MAX 500 MB)
Max 500 MB per file
Crop preview
Your video and crop box appear here after you choose a file. Drag the box or edit the percentages below.
Preview is not available for this file
No worries — your video can still be converted. Set your file name and click Convert when you are ready.
Crop region as % of intrinsic frame. Drag the box or edit values; even dimensions are applied on export.
Quick use cases
- Aspect ratio fixes
- Removing letterboxing
- Framing for vertical platforms
Workflow
- Upload H264 video
- Set crop region
- Apply crop
- Download cropped output
Processing notes
- Crop coordinates apply to the visible frame.
- Re-encode time depends on duration and resolution.
- Preview before download when possible.
Compatibility notes
- H264 is widely used for web delivery, editing, and device playback.
- Use metadata preview to confirm resolution, duration, and codec settings.
- Validate exports on the platforms where you publish or review content.
Troubleshooting
- If processing is slow, reduce file size or use a more powerful device.
- If playback fails, try another target format from the Explore links.
- If quality looks off, compare source resolution/bitrate with your export settings.
Video crop FAQ
Does this video cropper upload my file to a server?
No. Processing runs in your browser using local compute; files are not sent to ConversionTab servers for this tool.
Which H264 workflows is this useful for?
Quick edits, QA checks, and one-off exports when you need a browser-based workflow without installing desktop software.
How do I verify the result?
Download the output, confirm duration and playback, and use the metadata viewer if your pipeline requires detailed stream checks.