Caption Result
Your generated timeline, statistics, and preview appear here.
Caption Preview
Validation Summary
| # | Time | Text | CPS | Status |
|---|---|---|---|---|
| No captions yet. | ||||
Project Settings
Configure project metadata and caption rules.
Transcript and Caption Builder
Timing and Text Utilities
Export Captions
Analyze first, then choose an export format.
How Closed Caption Generation Works
Closed captions convert spoken dialogue and meaningful audio into timed text. They improve accessibility for viewers who are deaf or hard of hearing. Captions also help people watching videos in noisy places. A useful caption file combines accurate wording with precise timing. Each caption should appear when the related speech begins. It should disappear when the speech or sound finishes. Short readable segments are easier to follow than dense blocks.
Timing and Readability
Good caption timing balances accuracy with comfortable reading speed. Many editors watch characters per second as a practical measure. Very fast captions can overwhelm viewers before they finish reading. Extremely short captions may also flash distractingly on screen. Keep lines concise and split sentences at natural language boundaries. Avoid separating a name from the phrase describing it. Speaker labels help when the active speaker is unclear. Sound cues such as music, laughter, or alarms provide context. These cues should describe meaningful audio rather than every background sound.
Editing and Exporting
This generator lets you build captions manually or from transcript lines. You can edit timestamps, speakers, positioning, and text formatting. Validation checks can reveal overlaps, reversed timestamps, long lines, and fast reading speeds. Search and replace helps correct repeated names or technical terms. Global timing shifts are useful after video edits change synchronization. SRT remains widely supported across players and publishing platforms. WebVTT works well with modern HTML video experiences. SBV is useful for simple timestamped subtitle workflows. CSV supports review in spreadsheet software and production systems. PDF exports create a readable transcript for clients or records. Caption quality also depends on consistency. Use the same spelling for names, products, locations, and specialized vocabulary throughout a project. Keep punctuation natural and preserve the speaker's meaning without unnecessary filler. Check caption placement when important graphics or lower-third titles appear. This prevents readable text from covering essential visual information. Always review exported captions against the final video before publishing.
Caption Reference Table
| Check | Recommended Range | Why It Matters |
|---|---|---|
| Characters per line | About 32–42 | Improves readability on smaller screens. |
| Lines per caption | Usually 1–2 | Reduces visual obstruction and scanning effort. |
| Caption duration | About 1–7 seconds | Avoids flashing text or overly persistent captions. |
| Reading speed | Preferably under 20 CPS | Gives viewers enough time to read naturally. |
| Gap between captions | Small positive gap | Prevents accidental overlap and timing conflicts. |