YouTube Subtitle Generator
AI listens to your video and writes subtitles with accurate timing — review every line, then export an SRT that YouTube Studio accepts as-is. Better than YouTube's automatic captions, and you control every word.
- High-accuracy AI
- 100+ languages
- Line-by-line editor
- Fast turnaround
How it works
- Step 1
Upload your video
Drag in the MP4, MOV or WebM you publish on YouTube — audio is extracted in your browser, no account needed to start.
- Step 2
AI writes the subtitles
Speech becomes punctuated, accurately timed subtitle lines — with optional translation into 100+ languages.
- Step 3
Export & upload to YouTube
Fix any line, export SRT, and upload it in YouTube Studio under Subtitles → Upload file → With timing.
Subtitles for your YouTube video, without typing them
Upload the video file you're publishing (or download it from YouTube Studio). SubtitleFlow extracts the audio in your browser, AI transcribes the speech into timed subtitle lines with punctuation, and you review them in a line-by-line editor. Export an SRT and upload it under Subtitles in YouTube Studio — the timing is already done.
- Timed subtitles generated from your video's audio — no manual typing or syncing.
- Fix names, terms and wording line by line before you publish.
- Export SRT or VTT — the subtitle files YouTube Studio accepts.
- Optionally translate the same subtitles into English and 100+ other languages.
Why not just use YouTube's automatic captions?
YouTube's auto-captions are free but you can't easily review them, names and jargon often come out wrong, and they arrive without punctuation. Uploaded subtitles are the version viewers see by default, so they're worth getting right. SubtitleFlow gives you an accurate first draft with punctuation and a fast editor to correct it — and the same file can be translated so viewers in other countries can follow along.
How to add the subtitles to YouTube
- Open YouTube Studio and choose Subtitles in the left menu.
- Pick your video, then Add language (or select the video's language).
- Under Subtitles choose Add → Upload file → With timing, and select the SRT you exported.
- Check the preview and click Publish.
Frequently asked questions
Can I paste a YouTube link instead of uploading a file?
No — SubtitleFlow works from the video file itself. Use the file you uploaded to YouTube, or download your own video from YouTube Studio (Content → ⋮ → Download) and upload that.
Which subtitle format does YouTube accept?
YouTube Studio accepts SRT and WebVTT (.vtt) among others. SRT is the safest choice: choose Upload file → With timing and the subtitles appear exactly where they were timed.
Is this more accurate than YouTube's automatic captions?
Usually, yes — you get punctuation, cleaner sentence breaks and a line-by-line editor to fix names and terms before publishing. YouTube's auto-captions can't be reviewed as easily and often mis-hear proper nouns.
Does it work for YouTube Shorts?
Yes. Upload the Short's vertical video file the same way; shorter lines are easier to read on a phone, and you can split or merge lines in the editor before exporting.
How do I add subtitles to a YouTube video?
Generate an SRT from your video with SubtitleFlow, then in YouTube Studio open Subtitles, pick the video, choose Add language, and under Subtitles click Add → Upload file → With timing. Select the SRT, check the preview and publish.
Is it free?
You can try it free without an account — the first part of the video is subtitled so you can check the quality. Full-length videos use a paid plan or a one-time credit top-up.