Add Subtitles to Video Free
Upload any video or audio — AI transcribes the speech and gives you an SRT or VTT subtitle file in seconds. No signup, nothing stored.
Burn subtitles into your video
Bitcut for iPhone adds animated, styled subtitles directly to your vertical video — no file juggling, just tap and export in HD.
How it works
Step 1
Upload your video or audio
Drop an MP4, MOV, WebM, MP3 or WAV file. Maximum 50 MB and 20 minutes.
Step 2
AI transcribes the speech
Whisper AI detects the language automatically and transcribes word by word with timestamps.
Step 3
Download SRT or VTT
Get subtitles in SRT (universal) or VTT (web / YouTube) format, ready to import into any editor.
FAQ
Is this subtitle generator free?
Yes — completely free with no account required. Upload limits apply per IP to keep it open for everyone.
Which video formats are supported?
MP4, MOV, MKV, WebM, AVI for video; MP3, WAV, M4A, OGG for audio. Maximum 50 MB and 20 minutes.
How accurate are the subtitles?
The tool uses OpenAI Whisper, which is highly accurate for clear speech in major languages. Background noise, heavy accents or overlapping voices will reduce accuracy.
What is the difference between SRT and VTT?
SRT is the most widely supported subtitle format — works in VLC, Premiere, DaVinci Resolve and most platforms. VTT (WebVTT) is the web standard used by YouTube, HTML5 players and Vimeo. Both contain the same content.
Can I burn the subtitles into the video?
This tool gives you the subtitle file. To burn (hardcode) animated subtitles directly into your video, use the Bitcut app for iPhone — it adds styled captions with one tap.