The quick answer
Good captions reproduce the speech accurately, appear at the right time, and stay readable at a normal phone size. Correct automatic transcription, use short natural phrases, identify speakers when needed, and keep text clear of interface controls.
Start with accuracy
Automatic captions are a draft. Compare them with the recording before deciding how they should look. Check proper names, numbers, units, technical vocabulary, and words that reverse a meaning, such as “not.”
If a word is unclear, listen again with the surrounding sentence. Do not replace uncertainty with a confident guess. Where the sound genuinely cannot be understood, use an appropriate indication instead of inventing dialogue.
Captions and translated subtitles serve related but different purposes. Captions reproduce speech and relevant sound information. A translation conveys it in another language. A dramatic paraphrase should not be presented as a faithful translation.
Break lines at natural phrases
Read the sentence aloud and split it where a person would naturally pause. Avoid leaving a short word on a line by itself or separating a name from its surname. Give the viewer enough time to read the phrase before it changes.
Word-by-word animation can fit some fast clips, but it is not required for readability. A quieter educational clip may be easier to follow with stable phrases. Choose a style based on the content rather than copying a trend automatically.
Choose a style that survives the background
Use a simple font and sufficient contrast. White text on a bright window needs a background, outline, or shadow that maintains readability. Test the lightest and darkest scenes, not only the frame where you designed the template.
Keep captions within a comfortable width. A small phone screen can make text that looks readable on a laptop feel cramped. Watch the exported file at normal phone size rather than zooming into the editor preview.
Keep platform controls in mind. Buttons, descriptions, and account labels can obscure parts of a vertical video. Preview at the destination where possible, and move captions when an important visual would otherwise be covered.
Help viewers distinguish speakers
When the picture makes the speaker obvious, extra labeling may be unnecessary. When speakers overlap or appear off-screen, a name label or consistent placement can help.
Color alone should not carry the entire distinction. Some viewers cannot distinguish the chosen colors, and busy backgrounds may reduce the difference. Supplement color with a speaker label or another readable cue.
Decide whether captions are burned in or separate
Burned-in captions become part of the picture and appear for everyone. A separate caption track can offer platform-controlled display, accessibility features, and language choices where the destination supports them.
For a short-video workflow, burned-in text may be a practical choice, but do not assume it replaces every platform accessibility feature. If a separate caption file is supported, check its timing and language settings after upload.
Run a caption-only review
Watch once with the sound off. Ask whether the text communicates the content and whether relevant non-speech sounds need to be indicated. Then watch with sound and look for captions appearing noticeably early or late.
Finally, review the title and any text you added yourself. Those statements should be as accurate as the captions. An excellent transcription cannot fix a misleading title or an edit that removes necessary context.
When captions fail
If captions never generate, appear outside the picture, or disappear from an export, use the CapCut caption troubleshooting guide to identify which stage failed before changing the project.
Sources & further reading
Official documentation checked on October 6, 2026. Platform features and rules can change.