SRT Generator for Audio and Video
SubTran generates synchronized SubRip SRT subtitles in the browser, using local audio extraction and OpenAI Whisper timestamps for editable cues.
subtitle generator quick steps
Create downloadable SRT subtitles from a browser in three straightforward steps, with automatic language detection and editable cues.
Upload your audio or video
Select a common file type, for example MP3, WAV, M4A, or an MP4 video; the browser extracts and compresses audio locally before sending for ASR.
Generate with OpenAI Whisper timestamps
Start transcription and use automatic language detection or pick the spoken language so Whisper returns word-level timestamps for precise timing.
Review, edit, and download SRT or VTT
Edit sequence numbers, timestamps, line breaks, or cue text in the SRT preview, then download SubRip (.srt), WebVTT (.vtt), or TXT for reuse.
SRT creator features
Automatic speech transcription
OpenAI Whisper recognizes dialogue and returns word-level timestamps that SubTran converts into precise cue timings.
Local audio extraction
The browser extracts and compresses the audio track locally, so video frames remain on your device while only compressed audio leaves the browser.
Readable SRT segmentation
Words are grouped using punctuation, pauses, cue duration, and line length to create human readable SubRip cues instead of fixed interval blocks.
Editable SRT preview
Review and edit sequence numbers, start and end times, line breaks, and cue text before exporting a final SRT file.
Long recording support
Long media is split into ten minute audio chunks, transcribed in order, and merged into one continuous SRT timeline with correct offsets.
Multiple spoken languages
Use automatic language detection or explicitly choose a language so the ASR model produces accurate word timestamps across languages.
automatic caption generator benefits
Skip manual timestamps
Start with synchronized subtitle cues so you avoid typing dialogue and timing every line by hand.
Keep video frames local
For video inputs, only compressed audio chunks leave the browser, preserving privacy and avoiding large video uploads.
Import into common tools
Downloaded SubRip SRT files work with video editors, media players, course platforms, and publishing workflows that accept standard captions.
Improve accessibility
Add readable captions that support WCAG and ADA style playback, helping viewers follow speech and understand recorded content.
Create reusable text
Export the same transcription as TXT, SRT, or WebVTT to repurpose material for search, quoting, or content repackaging.
Work in a browser
Generate, preview, edit, and download an SRT file without installing desktop software or sending full video files to external hosts.
AI subtitle maker use cases
Caption interviews
Convert spoken interviews from podcasts, Zoom recordings, or field audio into synchronized subtitles with editable dialogue and timing.
Subtitle courses and tutorials
Create a subtitle draft for lessons, training videos, and demonstrations so learners can follow along and search content.
Caption social video
Generate SRT files for short clips, marketing videos, and creator content optimized for platforms like YouTube and social players.
Prepare editor imports
Download SubRip subtitles for editors and caption workflows that accept SRT to speed up post production.
Make archives searchable
Turn speech from older recordings into timed text that is easier to review, quote, and index for research or journalism.
Support accessible playback
Add captions compatible with common players and platforms so viewers can follow dialogue without relying only on audio.
SRT editor frequently asked questions
How do I generate an SRT file from audio or video?
Upload an audio or video file, choose automatic language detection or select the spoken language, run transcription, then review and download the SRT preview.
Does the SRT include timestamps and word-level timing?
Yes. OpenAI Whisper returns word-level timestamps which SubTran converts into numbered SubRip cues with start and end times for each subtitle.
Can I edit word-level timings in an SRT file?
Yes. The SRT preview is editable so you can adjust timestamps, sequence numbers, and cue text to fine tune word-level timings before downloading.
How does an AI SRT generator handle speaker pauses and punctuation?
SubTran groups words into cues using punctuation, detected pauses, cue duration limits, and line length so pauses naturally influence subtitle cuts.
What happens with long recordings and how to create SRT for long files?
The browser splits long audio into ten minute chunks, transcribes them sequentially, and offsets timestamps so the final SRT is one continuous file.
Can I download WebVTT or plain text as well as SRT?
Yes. After previewing and editing you can download the same result as SubRip (.srt), WebVTT (.vtt), or TXT for different workflows.
Is there an SRT generator that keeps video frames local for privacy?
Yes. SubTran keeps video frames on the device by extracting and compressing only audio locally, then sending audio chunks for ASR.
Can I use SubTran for accessibility and WCAG captioning workflows?
Yes. SubTran produces readable timed captions that help make recorded content accessible, and SRT files integrate with many WCAG and ADA captioning workflows.
timed captions generator start
Generate an editable SubRip SRT file in minutes, with local audio extraction and word-level timestamps from OpenAI Whisper.