Do you upload my video?
No. Processing runs locally in your browser.
Add Text to MKV Video
Add text overlays to MKV videos locally and export — no uploads.
Frequently asked questions
Is the text burned into the video?
Yes. The overlay is rendered into the output video frames.
Does this affect quality?
Text overlays require re-encoding. Quality depends on encoder support and settings.
Can I add multiple lines?
Yes. Use \n to create multiple lines.
Which formats are supported?
Common inputs include MP4/WebM/MOV/MKV. Output supports MP4/WebM/MOV/MKV.
Which browsers are supported?
For best results, use the latest Chrome / Edge with WebCodecs support.