MP3 to SRT Subtitles
Convert an MP3 podcast clip or voiceover into timed SRT subtitles. Download a caption file for your waveform video or editing timeline.
3-day free trial
Podcast highlight SRT
Download example1
00:00:00,840 --> 00:00:03,120
We tested the idea with three listeners.
2
00:00:03,460 --> 00:00:06,880
The second round gave us a much clearer question.
How it works
Upload your file
In Speechyou Notes, select Upload, choose your recording, and select Upload & transcribe.
Review the transcript
Open the finished note and listen for names, technical terms, and changes of speaker. Check those passages again in the exported captions.
Export Subtitles (.srt)
Choose your subtitle format from Export when the transcript contains timed segments. Check the cue timing in your editor or player.
Accepted extension .mp3
Export guide
Generate subtitles for a waveform video
Transcribe the MP3 clip you will use in the video. When you add the audio beneath a waveform or a still image, place it at the beginning of the timeline and import the SRT. The caption times are measured from the start of the MP3.
Check captions against the voiceover edit
Preview the clip with captions on and listen for the start of the first line. If your video starts with a title card or cuts a pause out of the audio, adjust the SRT in your editor or regenerate it from the finished cut.
Handle a clip cut from a longer podcast
If your highlight starts at 12 minutes and 40 seconds into the episode, upload the exported clip as its own MP3. Its captions will use the clip’s start as zero. If you already have the episode’s SRT, trim the relevant cues and shift them by the excerpt’s offset in the subtitle editor.
Prepare a voiceover for a short video
Keep the MP3 used for transcription identical to the MP3 placed beneath the video. When you add an intro before the voiceover, move the subtitle cues by the same delay. Preview the first sentence after the intro and listen for the final word before delivering the SRT.
Prepare an MP3 highlight for captions
- Upload the standalone highlight if the editor’s timeline begins at the excerpt.
- Add the same delay to the captions and voiceover when a title card comes first.
- Preview with sound and captions on before publishing the clip.
Frequently asked questions
Do I need an MP4 to create the SRT?
You can upload the MP3 directly. Export Subtitles (.srt) once the transcript has timed speech segments, then pair the file with your video in the editor.
Can the same SRT caption a short excerpt?
Use the SRT with the exact audio you transcribed. If the excerpt starts later than the original recording, transcribe the excerpt or shift and trim the cues to match.
Can I send the SRT as show notes?
SRT is best when captions need to appear at specific times. Export TXT or Word from the transcript if readers will browse or edit the podcast text.