Auto Caption

Auto-generate caption overlays from transcript words.

How It Works

Requires transcript to exist. Creates caption overlays from word timings.

Specifications

Category
Text & Captions
Execution
instant
Credit Cost
Free
Overlay Types
caption
Tags
captions, ai

Example Prompts

“add captions”
“auto-generate subtitles”
“create captions from transcript”

Optional Parameters

style_template (string)
Caption style template to use
max_words_per_segment (number)
Maximum words per caption segment
target_row (number)
Timeline row for caption overlays
user_text (string)
undefined

Use Cases for Text & Captions

Style subtitles with animated highlights for TikTok and Reels
Position captions in custom layouts for educational content
Create multi-line caption blocks for interview segments

How to Get Started with Auto Caption

1.Open any project in the 6trim editor or create a new one.
2.Type a prompt in the AI assistant — for example: "add captions".
3.The Auto Caption result appears as a caption overlay on your timeline. Drag to reposition or resize.

Frequently Asked Questions

Try Auto Caption Free

Type a prompt or use the toolbar. No download required.

Use Auto Caption

More Text & Captions Tools

Set Text Content
Set or change the text content of a text or caption overlay. Can also change styles simultaneously.
Change Text Style
Apply a style patch to a text overlay (font, size, color, etc.). Can also change text content simultaneously.
Apply Text Template
Apply a pre-built text design template to a text overlay. Replaces all styles with the template's complete visual design. Can optionally change text content too.
Change Caption Style
Change the template and/or styles of a caption overlay.
Caption It
Generate captions for a specific video or voiceover overlay using its existing transcript data. For video overlays uses the Whisper transcript; for voiceover overlays uses the stored Resemble AI caption words.