How to Generate Subtitles With AI
Generate accurate captions fast, fix timing issues, and export in the right format for YouTube and socials.
Next Best Action
Finish this guide, then continue with another AI Video & Audio tutorial to lock in the workflow.
FAQ Highlights
- Why are subtitles out of sync?
- How do I caption multiple speakers?
- What’s the fastest way to fix a few wrong words?
Introduction
Subtitles improve watch time and accessibility, but manual captioning is slow. AI can generate subtitles quickly, and with a small cleanup pass you can get professional results.
Step 1: Choose the right input (clean audio beats fancy tools)
Caption quality starts with audio quality:
- reduce background noise if possible
- use a clear microphone when you can
- avoid overlapping speakers
If audio is messy, subtitles will be messy—no tool can fully fix that.
Step 2: Generate captions, then do a fast “accuracy pass”
After generating subtitles, scan for:
- names and product terms (often wrong)
- numbers, dates, and acronyms
- missing punctuation that changes meaning
Copy-paste prompt (for a text-based cleanup pass):
Edit the subtitles for accuracy and readability.
Rules:
- do not change meaning
- fix names, punctuation, and obvious mis-hearings
- keep timestamps unchanged (if present)
Subtitles:
[PASTE SUBTITLE TEXT]
Step 3: Export in the right format (SRT vs VTT)
Common formats:
- SRT: widely supported (YouTube, many editors)
- VTT: web-focused format used by browsers and some platforms
If your platform rejects a file, it’s usually a formatting issue (line breaks, timestamps, or encoding).
FAQ
Why are subtitles out of sync?
This usually happens when the caption tool guessed timing from a low-quality audio track or the video has variable frame rate. Re-generate from the final exported video/audio file if possible.
How do I caption multiple speakers?
Use short lines and label speakers only when it helps comprehension. Over-labeling can hurt readability.
What’s the fastest way to fix a few wrong words?
Search for the wrong term and replace it consistently. Focus on names, brand terms, and numbers first.