Open captions, not a loose file
CaptionFX is built for creators who need the captioned video itself. The export step renders the final caption layer into the frames of a new MP4.
Burned-in captions
Export captions that stay visible everywhere you post.
CaptionFX burns captions directly into the video frames, so the words travel with the MP4 on Reels, Shorts, TikTok, LinkedIn and any player that does not load sidecar subtitle files.
Control before permanence
Before export, captions are still data. You can change words, timing, style, position, highlights, bleeps and cuts without damaging the original upload.
Built for social platforms
Burned-in captions are useful when viewers watch on mute or when the platform will not show a separate subtitle track. The visible caption layer remains part of the video.
Questions people ask
What are burned-in captions?
Burned-in captions are captions rendered directly into video frames, so they are always visible in the exported MP4.
Can I change the caption style?
Yes. CaptionFX lets you adjust style before export, including type, color, outline, shadow, placement and highlights.
Does the export keep the original video?
The original upload is not overwritten. CaptionFX creates a new captioned MP4 when you export.