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How to Add Captions to a Video From Its Audio

Updated October 2026

Captions help viewers who are deaf or hard of hearing, and everyone watching without sound. Make a transcript from the audio, check it against the sound, then export a caption file for the video.

The short version
  • Start from a clean audio file; a clear recording gives a better transcript.
  • Check names, terms and numbers against the audio.
  • Time the captions to the speech, and keep each caption short.
  • Export SRT or VTT and load it into the video platform.

Start with clean audio

A clean recording gives a better transcript. Clean the voice first with the phone cleanup steps, then transcribe.

Check the transcript

A speech model misses names, technical words and quiet speech. Check each one against the audio before you export.

Export the captions

Tunedzy exports SRT and VTT caption files from the transcript. Load the file into your video platform, and check the timing on the first few captions. The caption export guide has the steps.

Transcribe, check, export captions

Tunedzy transcribes the audio on your PC, lets you check the words, and exports SRT or VTT captions.

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Frequently asked questions

Do captions need to be perfect?

They should be accurate. Check names and terms before you publish.

Which caption format should I use?

SRT is widely accepted; VTT is common for the web.

Is the audio uploaded for the transcript?

In Tunedzy, no. The transcript is made on your PC.

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