How to add word-by-word captions to Shorts, TikToks and Reels

To add word-by-word captions to a short video, transcribe the voiceover with an editor's auto-caption feature (CapCut and Premiere Pro both have one), switch the captions to show one word or a short phrase at a time with the current word highlighted, fix any misheard words, then burn them into the video in large, high-contrast text in the center of the 9:16 frame. If your voiceover is AI-generated, you can skip transcription entirely: the text-to-speech timing tells you exactly when each word is spoken.

Why word-by-word captions matter

• Many people watch on mute. Without captions, a narrated video says nothing.
• They hold attention. A highlighted word moving with the voice gives the eye something to follow every fraction of a second.
• They make faceless videos feel alive. With no face on screen, captions do part of the job a presenter's expressions would.

Three ways to add them

1. Auto-captions in a video editor

Most popular editors can transcribe speech and turn it into captions. The usual flow:

1. Import the video with its voiceover.
2. Run the auto-caption or speech-to-text feature.
3. Choose a style that shows a few words at a time, with the spoken word highlighted.
4. Read through and fix mistakes, especially names, numbers and made-up words.
5. Export at 1080x1920.

Good for: anyone already editing by hand. Downside: you repeat it for every video.

2. The platform's own captions

TikTok, YouTube and Instagram can generate captions viewers switch on. These are useful for accessibility, but they don't look like the bold, animated captions you see on faceless channels, and not every viewer turns them on. Use them in addition to burned-in captions, not instead.

3. Generated from the voiceover's timing

When your voiceover comes from text-to-speech, you already have the script and the timing of every word. Tools that build videos from a script use this to place each word exactly, with no transcription errors. This is the most reliable method for faceless channels that post daily.

Where to put captions on a 9:16 video

Short-video apps cover parts of the screen with buttons and text:

• Right side: like, comment and share buttons.
• Bottom: the account name, caption and sound.
• Top: on some apps, search or tabs.

Keep captions in the middle of the frame, slightly below center, away from all three. Test by watching your video in each app before you post a batch.

Style rules that work

• Big. Readable on a small phone at arm's length.
• High contrast. White or yellow text with a dark outline or shadow, so it reads over any image.
• Short chunks. One to three words at a time.
• Highlight the spoken word. A color change or slight scale-up on the current word.
• One font, one look. The same caption style on every video is part of your channel's identity.
• No full-sentence blocks. Paragraphs of text on screen compete with the visuals.

Common mistakes

• Uncorrected transcription errors. One wrong word in a history video undermines the whole thing.
• Captions behind the buttons. Text nobody can read.
• Too much animation. Bouncing, spinning words get tiring over 60 seconds.
• Captions out of sync. Even a slight lag feels wrong. Check the first and last words.

Doing it automatically

Tayang adds word-by-word captions to every video it makes, timed from the narration, in 27 languages. It writes, illustrates and narrates a new 1080x1920 short in your niche every day and posts it to TikTok, YouTube Shorts, Instagram Reels and Facebook Reels, with or without your approval first.

For the full production process, see how to make faceless AI videos, or compare methods in how to make faceless videos.

FAQ

What are word-by-word captions?

Captions that show one word or a short phrase at a time, synced to the voice, usually with the current word highlighted.

Should captions be burned in or added as subtitles?

Burn them in for short-form. They look the same on every platform and show for everyone, not just people who switch subtitles on.

What font size should captions be?

There's no fixed number. Make them big enough to read on a phone without squinting, and test on a real device.

Do captions help videos get more views?

They help people understand the video on mute and keep watching, which is what views depend on. They won't save a weak hook.