Convert Audio to SRT Subtitles Online, Free
AudioToSRT turns an MP3, WAV, M4A or video file into clean, timed subtitles you can fix before you download.
Choose language and phrase length before you start.
- 100 MBmax file size
- 45 minmax length
- 7input formats
- Auto-deleteafter ~60 minutes
Simple subtitle workflow
Sound goes in, timed text comes out. The recording is split where the speaker pauses, so every subtitle block starts and ends on a natural break.
-
Upload your file
MP3, WAV, M4A, MP4, MOV, WEBM or OGG, up to 100 MB. There is no account and no email step, so the file starts moving as soon as you pick it.
-
We generate subtitles
Speech recognition runs on our server, then the text is cut into timed phrases at natural pauses. A few minutes for a typical recording.
-
Download your SRT file
Play any line against the audio, correct a word, then save the .srt. The file you download is always your edited version.
Why use this tool
Five things that decide whether a converter is worth opening at all.
Use it for
- No signup requiredno account, no email address
- Clean subtitle formatting.srt in UTF-8, plain text
- Fast processing10 minutes of audio in about 4
- Works in your browsernothing to install
- Temporary file storageabout 60 minutes, then deleted
Edit against the audio, then download
Recognition gets names, numbers and rare words wrong more often than anything else. The editor puts the audio and the subtitle blocks side by side so you can hear the line and fix exactly that word.
Timings stay where the speech is, so nothing has to be retyped: you touch only the words that are wrong. If the phrases came out too long or too short, change how many words go into one block and the split is rebuilt without transcribing the file again. The version you save is the version you download.
Supported formats and limits
Upload audio straight from a recorder, or a video file and let the converter pull the audio track out of it.
Audio files
MP3 is the usual export from a podcast editor or a phone recorder. WAV and M4A come out of interviews and voice memos. Lossless WAV sounds better but uploads slower, so on a weak connection an MP3 at a decent bitrate is the practical choice.
MP3 · WAV · M4A · OGG
Video files
You do not need to extract the soundtrack first: upload the video and the audio is taken from it. This is the shortest path from a screen recording, a Zoom export or a phone clip to a subtitle file you can drop into an editor.
MP4 · MOV · WEBM
Size and length
Up to 100 MB per file and up to 45 minutes of audio, with five uploads per hour and ten files per session. A long recording is better split at a pause between topics than cut mid sentence, because a clean break also makes the subtitles easier to review.
100 MB · 45 min
5 per hour · 10 per session
What makes subtitles accurate
Speech recognition reads what it can hear, so the recording decides most of the result. A close microphone, one person speaking at a time and a room without echo give text that needs almost no correction. Background music, overlapping voices and phone line compression are what produce confident looking mistakes.
Two things are worth checking every time, whatever the audio quality was. Names and technical terms are the first: no recogniser can guess how a person or a product spells its name, and those are exactly the words a viewer notices. Numbers are the second, especially prices, dates and versions.
Picking the spoken language instead of leaving detection to guess also helps, particularly on short files where there is little speech to judge by. When a recording switches between languages, the result follows the dominant one, so a bilingual interview is better handled as separate files.
You do not have to accept the first pass. After conversion the editor opens with the audio and the subtitle blocks side by side, so you can play a line, fix a word and change how many words go into one block before you download the file.
Close microphone, one speaker
Nothing to correct.
Same words over music and echo
Two words wrong: condensate and wick. Both read as ordinary text, which is why a quick listen through the editor is worth the minute it costs.
~60minutes, then deleted
Your files stay private
Your upload and the subtitles made from it are kept only while you need them: about an hour after the conversion finishes, both are deleted from the server automatically. You can also remove a job yourself at any point, and nothing is published anywhere or used to train anything. There is no account, so nothing is tied to your name.
Nothing is published, nothing is used for training.
FAQ
Is it free?
Yes. There is no account, no trial and no payment step: you upload a file, wait for it to be processed and download the SRT.
Do you store my files?
Only for about an hour after the conversion finishes, so that you have time to review and download the result. After that the upload and the subtitles are deleted automatically, and you can also delete them yourself at any moment.
What formats are supported?
Audio in MP3, WAV, M4A and OGG, video in MP4, MOV and WEBM. With a video file the audio track is taken out for you, so there is no need to extract it first.
How long does a conversion take?
Usually a few minutes. The exact time depends on how long the recording is and how busy the queue is, and the page shows an estimate while you wait, so you can leave it open and come back.
Can I convert an MP3 to SRT?
Yes, MP3 is the most common upload here. The same applies to a WAV from a recorder or an M4A voice memo: the file goes through the same conversion and comes back as a subtitle file.
Can I edit the subtitles before downloading?
Yes. When the conversion is done the result opens in an editor where you can play each line against the audio, correct the text and change how many words go into one subtitle block. The file you download is the edited version.
Which languages work?
Speech in most widely spoken languages is recognised, and you can pick the language before uploading instead of leaving it to automatic detection. Doing so noticeably helps on short recordings, where there is little speech to judge from.
What is an SRT file?
A plain text file that pairs lines of dialogue with the times they appear on screen. Video editors, players and platforms such as YouTube all read it, which is why it is the usual format to hand over with a video.
Guides
Browse all guides (how-tos, formats, use cases).
Ready to start?
Upload a file and download your subtitles when they are ready. No account, no payment, nothing to install.