1

00:00:00,000 --> 00:00:04,000

Convert MP3 to SRT subtitles

Convert MP3 to SRT subtitles when your audio needs timed captions rather than a plain transcript. FastScribe transcribes the MP3 with our own transcription engine and formats the result as a standard SRT file with numbered cues and timecodes. The first file is free with no signup.

Choose a file

audio or video · your first file is free, no signup

encrypted · deleted right after transcription · no signup

What an SRT file actually is

An SRT is a plain-text subtitle file where each caption has a number, a start and end timecode, and a line or two of text. Nearly every video editor, player, and platform reads it, which makes it the safe default for captions.

FastScribe builds the SRT from the transcript's timestamps, splitting it into readable cues that appear and disappear in time with the speech. You get a file you can load directly instead of hand-timing captions line by line.

Using your SRT with video

If the MP3 is the audio bed for a video, drop the SRT into the same timeline and the cues will land on the right moments. Most platforms also let you upload an SRT alongside a video so viewers can toggle captions on and off.

Prefer captions that stream inside a web player? Export VTT instead, which is the format built for HTML5 video. For a plain reading copy with no timing, choose TXT, and Pro adds DOCX for a formatted document.

Frequently asked questions

Will the SRT timings match my audio exactly?

The cues are built from the transcript's timestamps, so they track the speech closely. Fast or overlapping speech can drift slightly, and any editor lets you nudge a cue if you need it perfect.

What is the difference between SRT and VTT here?

SRT is the universal subtitle format that almost everything reads, while VTT is designed for HTML5 web video and supports a little extra styling. FastScribe exports both from the same MP3.

Can I edit the SRT after downloading it?

Yes. An SRT is just plain text with timecodes, so you can open it in any text editor or subtitle tool to fix wording or adjust the timing of any cue.