Media & Audio

Transcribe, caption, and convert audio and video files.

Subtitle files are a tangled mix of formats — SRT, VTT, ASS — each with its own timestamps and styling. These media tools convert between all of them, extract clean transcripts, and transcribe speech with on-device OCR. Captions and audio stay in your browser, which matters when the video is unreleased or confidential.

3 free tools · processed in your browser

Text to Speech

Read text aloud using your browser's built-in speech synthesis. Adjust voice, rate, and pitch for perfect playback.

Open

Duration Converter

Convert durations between seconds, minutes, hours, days, and weeks — plus ISO 8601 duration strings.

Open

Subtitle Converter

Batch

Convert subtitles between SRT, VTT, ASS, plain text, CSV, and Excel. All conversions run locally in your browser — no uploads, no servers.

Open

FAQ

Media & Audio — frequently asked questions

Which subtitle formats can I convert?

SRT, VTT, and ASS/SSA in every direction, plus exports to CSV and Excel and plain-text extraction for transcripts.

Are timestamps preserved?

Yes. Timing is converted faithfully between comma milliseconds (SRT), dot milliseconds (VTT), and centiseconds (ASS).

Is my video or subtitles uploaded?

No. All conversions run in your browser. You only provide subtitle files or text — the tool never handles your video file.