AI subtitles in your browser
Upload your file and the AI generates accurate, timed subtitles in seconds — no app, no credit card. Works on any device with a browser.
AI-powered — free to try
AI Subtitle Generator — 100+ Languages
Upload any audio or video file. AI transcribes it and downloads an SRT subtitle file in seconds — free to try, no credit card.
1. Upload your file2. Select language3. SRT downloads automatically
MP3, MP4, WAV, M4A, FLAC, OGG, or WebM · Max 25 MB
Match the spoken language for transcription — or pick a different language to translate the subtitles automatically.
Drag and drop your file here, or click to upload
MP3, MP4, WAV, M4A, FLAC, OGG, WebM · Max 25 MB
Uploading a song? Use our Lyrics to Captions tool instead for more accurate lyrics.
Why use this AI subtitle generator
There are plenty of AI subtitle generators online. Most of them add a watermark or only support English. This one doesn't.
100 language AI subtitle support
The AI subtitle engine supports 100 languages — Arabic, Hindi, Urdu, Indonesian, Thai, Vietnamese, Japanese, Korean, Swahili, and many more that most tools struggle with.
Free AI subtitle generation
The web tool is free to try — 5 free SRT files with a free account. For Premiere Pro editors, CaptionX is free to start — styled, animated, and placed directly in your timeline.
For Premiere Pro editors
AI subtitles directly in your timeline
CaptionX is a Premiere Pro extension panel that brings AI subtitle generation right into your editor — no SRT import, no manual sync. Styled, animated, and ready to export. Free to try — no credit card required.
Free plan includes
- Free to start
- 100+ language AI transcription
- Styled, animated captions
- SRT export for YouTube
- No credit card required
Need it in another language?
Translate your subtitles into 89 languages
Upload the same audio (or the SRT you just generated) into the Subtitle Translator and download a translated .srt — cue timings preserved, free to try.
Frequently asked questions
What is the best free AI subtitle generator?
The best free AI subtitle generator is one that doesn't stamp a watermark on your subtitles. The tool on this page is free to try — sign in free and get 5 timed SRT files in 100 languages, with no watermark and no credit card. Many popular AI subtitle tools add a watermark on export; this one does not.
Is there an AI subtitle generator with no watermark?
Yes. The CaptionX AI subtitle generator adds no watermark — you download a clean SRT, and the captions you generate in the Premiere Pro plugin are watermark-free too. Your subtitles are yours, with nothing stamped on them.
What is an AI subtitle generator?
An AI subtitle generator uses artificial intelligence to automatically transcribe audio and produce timed subtitles. Upload a file above and the AI generates an SRT in seconds — free to try, with 5 free SRT files.
Is there a free AI subtitle generator?
Yes, it's free to try: sign in with a free account and your first 5 SRT files are free. For Premiere Pro editors, CaptionX is free to start — no credit card required.
How does the AI subtitle generator work?
Upload your audio or video file, select the spoken language, and click Generate Subtitles. The AI analyses your audio, timestamps the speech, and downloads an SRT automatically.
What languages does the AI subtitle generator support?
100 languages including English, Spanish, Portuguese, French, Arabic, Hindi, Urdu, Indonesian, Thai, Vietnamese, Japanese, Korean, Swahili, and many more.
How accurate are AI-generated subtitles?
For clear audio with minimal background noise, the AI subtitle generator is highly accurate. Review and correct the SRT before uploading to YouTube or your editor.
Can I use an AI subtitle generator for YouTube?
Yes. Upload the downloaded SRT to YouTube Studio as a manual subtitle track — more accurate than YouTube's built-in auto-captions.
Generate AI subtitles in 100 languages
Upload your file above for an instant SRT, or get CaptionX for Premiere Pro and generate AI subtitles directly in your timeline.