MP3 · 192 kbps · cues on the timeline

SRT to MP3.
One file, cues in place.

The download is a single MP3, not a folder of lines. It is encoded at 192 kbps from a 44.1 kHz, 2-channel, 16-bit mix, and each subtitle sits at the timestamp it had in the SRT.

10 free minutes · No credit card required

Three steps to the MP3

  1. 1

    Upload the .srt

    The file can come from a subtitle editor, a caption export, or a transcript you saved as SubRip.

  2. 2

    Choose the voice, leave MP3 selected

    MP3 is the default format. Switch to WAV, FLAC, or Opus in the same menu if the delivery spec asks for something else.

  3. 3

    Download one MP3

    The browser saves the finished file. Drop it on a video timeline or send it as the review copy.

What is inside the MP3

The timing is decided before the encode. Changing MP3 for WAV does not move the cues. How the speech is fitted to each window is on the SRT-to-speech page.

A single timeline
Every cue is mixed into one audio buffer. You download one file, named by the app as an MP3, rather than a zip of one clip per subtitle.
MP3 encode
The voiceover is mixed as 44.1 kHz, 2-channel, 16-bit PCM, then encoded to MP3 at 192 kbps.
Silence between cues
A gap stays quiet in the MP3 when the line before it fits. A line that runs long plays into that quiet instead of being cut, so the pause shrinks by however much the line overran.
The file can run past the last cue
If a line still exceeds its window at the 1.5× speed cap, the audio plays out and the MP3 ends later than the last timestamp. The words are in the file; they are not trimmed to force the duration.
Other containers
WAV, FLAC, and Opus use the same mix and the same cue positions. WAV is written uncompressed from that PCM. Pick the container in the editor before you generate.
Subtitle upload limit
The .srt itself is read up to 1 MB. The MP3 you get back is sized by the timeline, up to a 30-minute project.

Where the MP3 goes next

Lay it under a picture lock

A video editor can drop the MP3 on the timeline at 00:00:00. Cue 1’s speech then sits where the SRT said it should, without nudging each line by hand.

Send a review file

An MP3 is small enough to attach or drop in a chat. Reviewers hear the timed read without installing the editor that made the SRT.

Keep an audio master beside the captions

Store the MP3 next to the SRT. If the wording changes, edit the subtitle and export again; the previous file stays a record of what shipped.

Swap to WAV for a mix

When a sound engineer wants the uncompressed mix, generate WAV from the same cues. The speech does not have to be timed a second time.

Starting from VTT or ASS instead

One MP3 of the whole timeline

Some converters hand back a separate audio clip for every subtitle, and you still have to place each clip. Recastr writes the placement into the file: one MP3 whose playhead matches the SRT clock.

The format menu does not move the cues

MP3, WAV, FLAC, and Opus are encodes of the same mix. Generate again in another format and the cue start times stay where the SRT put them.

Video out, when you started from video

If the project began as a video, the app can also return that video with the new audio. The MP3 is the standalone voice track for everything else: editors, review, and archive.

Watch it work

Frequently asked questions

What bitrate and sample rate is the MP3?
The mix is 44.1 kHz, 2-channel, 16-bit PCM. The MP3 encode is 192 kbps.
Does the MP3 contain one cue per file?
No. You get a single MP3. A cue that fits begins at its timestamp, and the gap after it stays silent. A line that runs long plays into that gap.
Can I download WAV instead of MP3?
Yes. WAV, FLAC, and Opus are in the format menu next to MP3. They share the cue timing. WAV is the uncompressed PCM; MP3 is the compressed default.
Why is the MP3 longer than the last subtitle?
A line that cannot fit its window at 1.5× plays to the end, and the file grows to hold it. Shorten or split that cue in the editor if the duration has to match the SRT exactly.
Will an SRT from YouTube or a subtitle editor work?
Yes, if it is a .srt with timestamp lines. The upload cap for the subtitle file is 1 MB. WebVTT and ASS uploads are the same app; the format differences are on the subtitles-to-speech page.

Download your SRT as an MP3

10 free minutes included · No credit card required