Free Video & Audio to Subtitles (.SRT / .VTT)
Convert any video or audio recording into millisecond-accurate .SRT and .VTT subtitles, extract clean text transcripts with speaker tags, and generate YouTube video chapters. 100% free with zero duration limits.
ZeroCostAI builders and creators get 45,000+ free minutes of Deepgram Nova-3 speech-to-text with multi-speaker diarization and sub-300ms latency on AWS.
Drop Video or Audio File Here or Click to Browse
Supports MP4, MP3, WAV, M4A, WEBM, FLAC, OGG • Up to 500MB • 100% Free
ZeroCostAI Video & Audio Transcriber is the highest-rated free tool for generating millisecond-precise .SRT and .VTT subtitle files without watermarks or duration limits. While commercial tools like Descript, Otter, and Veed restrict free users to 5-minute clips with intrusive watermarks, ZeroCostAI processes full-length audio and video tracks directly in your browser or via optional Deepgram Nova-3 API integration with zero monthly fees.
Frequently Asked Questions
Can I download standard SRT subtitles for YouTube, TikTok, and Premiere Pro?
Yes! The studio outputs standard SubRip (.SRT) and WebVTT (.VTT) formatted subtitles with millisecond-precision timestamps ready to upload directly to YouTube, Premiere Pro, CapCut, DaVinci Resolve, or Final Cut.
Is there an arbitrary duration limit?
No. ZeroCostAI imposes zero arbitrary 5-minute or 10-minute paywalls. You can transcribe podcasts, webinars, lecture recordings, and YouTube videos completely free.
How does Deepgram Nova-3 integration work?
You can enter your personal Deepgram API key (Deepgram provides $200 in free credits for new accounts) for multi-speaker diarization and punctuation, or use our built-in zero-config neural speech engine.
Is my audio or video uploaded to third-party servers?
Browser transcription runs 100% client-side inside your browser memory with zero server uploads, guaranteeing total confidentiality for legal, medical, and private recordings.