Visual Subtitle Timeline Editor
Drag, resize, split, and check compliance of subtitles on a visual timeline. Import and export SRT, VTT, ASS/SSA, TTML, and SCC formats.
Drop subtitle file here
SRT, VTT, ASS/SSA, TTML, SCC, MCC
Drop subtitle file here
SRT, VTT, ASS/SSA, TTML, SCC, MCC
100%
Compliance:
0 OK
0 Warnings
0 Errors
0 cues
Edit Subtitle
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Subtitle List
0Export
100% client-side. Your subtitle files never leave your browser.
Need to generate subtitles from audio? Transcribe your media first
Need the full transcript, not just a tool?
Upload audio or video, or paste a link — AI transcription in 100+ languages with speaker detection. 10 free minutes a day, no signup.
Frequently Asked Questions
subtitle editor runs in your browser: paste a URL, upload a file, or record from your mic. STT.ai picks the AI model and returns the transcript in under 5 minutes. Export as TXT, SRT, VTT, DOCX, JSON, or PDF.
Yes. Every visitor gets 600 free minutes to start on STT.ai, usable for subtitle editor the same as any other workflow. Paid plans starting at $5/month unlock longer files, private transcripts, and priority queueing.
subtitle editor runs on the same AI models as the rest of STT.ai — our best models reach 95-97% accuracy on clean speech (3-5% Word Error Rate on benchmarks). Switch models on the fly if the first pass is below your target.
subtitle editor can run on any of the Whisper models STT.ai hosts — STT.ai Enhanced (Whisper large-v3, most accurate, on paid plans), Whisper Large V3, Whisper Turbo (fast), Whisper Medium and Whisper Small.
Yes. Every transcript exports as SRT or VTT — works with YouTube, Vimeo, TikTok, VLC, and every major video player. The burn-subtitles tool overlays them onto video as hardsubs.
Yes. Speaker diarization automatically labels each voice (Speaker 1, Speaker 2, ...) and you can rename them in the built-in editor. Works across all models and languages.
Most subtitle editor jobs finish in under 5 minutes. A 1-hour audio file typically completes in 2-3 minutes with our fastest models. Speed depends on chosen model and current GPU load.
subtitle editor accepts 20+ formats — MP3, WAV, M4A, FLAC, OGG, MP4, MKV, MOV, WebM, AVI, and more. Output to TXT, SRT, VTT, DOCX, JSON, or PDF.
Yes. Audio files submitted to subtitle editor are processed and deleted by default. Pro plans add client-side encryption — even if STT.ai's database is breached, your transcripts are unreadable without your key. Data is never used for model training without explicit opt-in.
Yes. STT.ai offers a REST API with Python and Node.js SDKs, plus an MCP server for Claude and Cursor — all usable for subtitle editor workflows. Free API tier includes 100 minutes/month.
Yes. Every transcript opens in the built-in editor where you can correct words, rename speakers, adjust timestamps, and add notes. All changes save automatically.
Every transcript gets a unique shareable URL. Export to DOCX or PDF for email. Pro plans add password-protected and permanent links — useful for client work.
STT.ai handles 1,300+ platforms including YouTube, Vimeo, TikTok, SoundCloud, Zoom, Google Meet, podcast hosts, and more. URL transcription works with publicly-available content only — DRM-protected sources can't be transcribed.