Make readable captions for Reels and TikTok

Video captions and post captions do different jobs

Video captions show the words someone says while the clip plays. The caption typed underneath a social post is a description. A good post description cannot replace spoken-word captions inside a talking video.

This guide covers words inside the video. It does not generate hashtags or guarantee that a clip will get more views. The aim is a video people can follow when they watch with the sound off.

Keep the words inside the useful picture

Buttons, account names, and descriptions can sit over the edge of a vertical video. Their positions change with the platform, device, and viewing mode, so a single fixed safe-area measurement is not a reliable rule for every post.

Start with captions near the lower-middle of the picture, away from your face or demonstration. Preview the upload in the actual app. If the interface covers a word, move the captions in your editor and export again.

Create the captioned clip in CapSub

For an energetic talking clip, try a bold preset. If the background changes from bright to dark, a caption box can help maintain contrast. Keep highlights deliberate: emphasise a key word rather than making every word compete for attention.

1. Import the take you want to publish.
2. Generate captions using Auto-detect or the spoken language selected in Settings.
3. Review the text and timing, then choose a caption style.
4. Adjust the size and position in the video preview.
5. Use Export Video and upload the saved result to Reels or TikTok.

Watch a muted preview

Play the exported file at normal viewing size with the sound off. Can you follow each sentence without pausing? Does a caption stay visible long enough to read? Does the text obscure the thing being explained?

Short phrases often fit a phone screen better than an entire paragraph. Keep the wording faithful to what was said. Rewording a sentence into a catchier hook belongs in the script before filming, not in captions that misrepresent the speaker.

Avoid a second layer of captions

If you upload a video with captions already visible, check whether the platform adds another visible caption layer. Two overlapping sets can make a clear video harder to read. Choose the presentation you want and preview the final post.

An SRT or VTT file is useful only when the destination accepts that format. It does not automatically place styled captions into every social upload. For a consistent visual treatment across platforms, export a video with the captions embedded.