Video to WebM
Create a WebM recording from a short clip in a format your browser can play.
Video to WebM: inputs, results and limitations
Create a WebM recording from a short clip in a format your browser can play.
How to use Video to WebM
- Choose the appropriate input file. General limits are 30 MB per file and 100 MB total.
- Review the options before running: Start time (seconds): 0 · End time (seconds): 2 · Width: 640 · Video bitrate (bits/second): 1500000
- Inspect the preview or result, then download a new file.
An illustrative use case
A browser-readable local clip exported in the WebM container.
Select a real sample file you are allowed to process. Begin with a short, simple input before attempting a complex document or recording.
What to inspect in the output
Start with a source that plays in the same browser. Confirm the exported file opens in the target viewer and check audio. Container conversion cannot make an unsupported input decoder appear.
Where this tool stops
Outputs WebM only where MediaRecorder supports it. No MP4 encoder is included.
Settings and starting values
| Control | Starting value |
|---|---|
| Start time (seconds) | 0 |
| End time (seconds) | 2 |
| Width | 640 |
| Video bitrate (bits/second) | 1500000 |
Troubleshooting Video to WebM
Check that the original clip plays in this browser. Keep requested times within its duration and leave this tab active while real-time recording completes. If a codec is rejected, use a supported source rather than only changing its extension.
Questions about Video to WebM
Can I convert WebM to MP4 here?
No. This version includes WebM recording where supported, without an MP4 encoder or server conversion service.
What input does Video to WebM need?
Choose video/* input. Outputs WebM only where MediaRecorder supports it. No MP4 encoder is included.
Which options does Video to WebM provide?
Start time (seconds), End time (seconds), Width, Video bitrate (bits/second). Review the starting values in the table and adjust them for your input.
Your original input is preserved. Review the new output before using it in a published page, customer delivery or production workflow.
JavaScript enables the interactive workspace.