AdKit MotionCaption styles for short-form ads: what works and how to set them up
Pick the style by placement
| Style | Where it fits | Note |
|---|---|---|
| Word-by-word highlight | TikTok, Reels, Shorts | One to three words on screen at a time |
| Line captions | Feed ads, LinkedIn | Two lines at most, readable at a glance |
| Hook title plus captions | First 3 seconds of any ad | Title states the promise, captions follow the voice |
| Karaoke fill | Music-led ads | Can distract in talking-head ads |
Safe zones
Vertical platforms cover the bottom of the screen with captions and buttons, and the right edge with like and share icons. Keep captions in the middle band and leave space on the right. Each platform publishes its own safe-zone guides for ads. Mark them as a guide layer in your template so every editor sees the same limits.
Readability rules that hold up
- High contrast: white text with a dark stroke or a solid box behind it.
- One font weight for captions, a heavier one for the hook title.
- Highlight the word that carries meaning, not every word.
- Keep timing tight to the voice. Captions that lag by half a second look broken.
Tools in After Effects
You can build captions by hand, but packs and scripts save most of the time. Marketplaces like VideoHive sell caption packs built at 1080x1920 for Reels and Shorts. Scripts such as Motion Subtitle Maker on aescripts generate animated subtitles from an SRT file. Free kits exist too, with simpler styles. Check the license on any pack before using it in paid client ads.
Setting up a reusable template
- One control layer for font, colors and stroke.
- Separate compositions for 9:16, 4:5 and 1:1, linked to the same text source.
- A guide layer with safe zones for each platform, switched off at render.
- Markers for the hook, the body and the end card, so every ad follows the same rhythm.
Get a free caption template
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Get the free templateFrequently asked questions
Should captions match the voiceover word for word?
For ads, yes, or close to it. Viewers notice when the text says something different from the voice.
How big should caption text be?
Big enough to read on a phone held at arm's length. Preview the render on a real phone before sending it to the client.
Can I import an SRT file into After Effects?
Not natively in a way that gives animated captions, but several scripts and plugins do it.