For YouTubers

Accurate YouTube Closed Captions in Minutes

YouTube auto-captions get names, places, and brands wrong. CaptionFit lets you paste your script or auto-transcribe — then exports a clean SRT.

Try it free — no credit card
How it works

Three steps. That's the whole thing.

  1. Upload — Drop in your YouTube video file (MP4, MOV, WebM).
  2. Transcribe or paste — Auto-transcribe or paste your script to instantly correct names, brands, and places.
  3. Download — Export an SRT file for YouTube Studio, or a captioned MP4 for Shorts and social clips.
Features

Built for YouTubers

Auto-transcription

CaptionFit transcribes your video with high accuracy — far better than YouTube's default auto-captions for names and technical terms.

Script correction

Paste your script to fix every mishear in one step. No hunting through timestamps to find the wrong words.

SRT export for YouTube

Export a standard SRT file and upload it directly in YouTube Studio to replace auto-generated captions.

16:9 rendered video

Render a captioned widescreen MP4 for repurposing clips, or export 9:16 for YouTube Shorts.

Free to start

No credit card required. Generate your first YouTube transcript and SRT immediately.

Perfect for YouTubers

YouTube's auto-generated captions are notoriously bad at proper nouns — channel names, product names, guest names, and industry jargon get mangled. Uploading your own SRT file replaces those captions with an accurate transcript, which also improves the searchability of your video since YouTube indexes caption text.

CaptionFit speeds up the process. If you have a script, paste it in — CaptionFit aligns it to your video audio in seconds. If you didn't script the video, auto-transcription gets you 90% of the way there, and the editor makes quick work of the rest. Export your SRT and upload it in YouTube Studio in minutes.

If you also run a podcast, see how to add captions to your podcast. And if you're repurposing YouTube content for social media, check out tools for adding captions to Reels, TikToks & Shorts.

FAQ

Common questions

How do I add accurate captions to a YouTube video?
Upload your video to CaptionFit. It auto-transcribes or lets you paste your script, then exports a clean SRT file. In YouTube Studio, go to Subtitles, click Add, and upload the SRT file — your video now has accurate closed captions.
What is an SRT file and why do I need one for YouTube?
An SRT (SubRip Text) file is a standard caption format that contains timed text. Uploading an SRT to YouTube replaces the auto-generated captions with your accurate version, improving accessibility and searchability for your channel.
Can CaptionFit generate a YouTube video transcript?
Yes. CaptionFit transcribes your video and lets you edit the result in the browser. You can copy the transcript text for your video description or episode notes, and export an SRT for the YouTube captions upload.
Does CaptionFit support 16:9 YouTube video format?
Yes. CaptionFit supports 16:9 widescreen output for YouTube, as well as 9:16 vertical for Shorts. You can render a captioned MP4 in either format or just export the SRT file for YouTube Studio.
Is CaptionFit free for YouTubers?
Yes. CaptionFit has a free tier — no credit card required. Start generating YouTube closed captions and transcripts immediately at captionfit.com.

Replace broken auto-captions with accurate ones — in minutes

Try it free — no credit card