Free SRT Generator
Create Subtitle Files Online
AudioSRT generates frame-accurate SRT files from any audio or video file, entirely inside your browser. No upload to a server, no account, no file size limit — just accurate subtitles ready to drop into any editor or player.
Generate SRT Free →How to auto-create SRT files
Upload your file
Drop any MP3, WAV, M4A, MP4, MOV, or WebM file. Any length, any size. AudioSRT reads the file locally — nothing is sent to a server.
AI transcribes in your browser
OpenAI's Whisper model runs inside a Web Worker, completely off the UI thread. Transcription starts in seconds and updates progressively as each 30-second segment completes.
Download your SRT
Edit any word or timestamp, then export a clean, frame-accurate .srt file. Compatible with Premiere Pro, DaVinci Resolve, Final Cut Pro, VLC, and any SRT-compatible player.
What makes this SRT generator different
Zero upload
Your media never leaves your device. Whisper AI inference runs entirely inside your browser's Web Worker thread using WASM.
No file limits
No cap on file size or duration. Hour-long podcasts, full-length films — AudioSRT processes them in natural VAD-split segments without freezing your browser.
Edit before export
Fix misheard words, adjust timestamps, split or merge subtitle lines — then generate the final SRT. You get a clean file, not a raw dump of the AI output.
NLE-ready output
The exported SRT uses millisecond-accurate timestamps in the standard HH:MM:SS,mmm format, importable directly into any professional NLE.
Ready to generate your first SRT file?
No signup. No upload. Free to start.
Open the SRT Generator →