Audio to SRT Converter
Turn any audio file into a timed SRT subtitle file. Every line comes with start and end times; edit the text, then download SRT or VTT.
How to convert audio to SRT
Upload your MP3, WAV or M4A. Each line of the transcript is timed automatically. Click any line to correct it, then press SRT to download a subtitle file ready for YouTube, Premiere Pro, DaVinci Resolve, CapCut or any video player.
Why the timing lines up
Timestamps come from the speech model itself, per spoken phrase, so captions change where the speaker pauses — not every fixed number of seconds. Silences are skipped, so no empty captions.
Long recordings are processed in three-minute pieces inside your browser, and the timestamps of each piece are shifted to its real position in the file, so caption 412 of a 50-minute podcast still lands on the right second.
What is an SRT file?
SRT (SubRip Subtitle) is a plain-text file that pairs each line of dialogue with the moment it appears and disappears on screen. Every caption has three parts: a running number, a start and end time in hours:minutes:seconds,milliseconds, and the text itself, followed by a blank line. Because it is just text, you can open an SRT file in any text editor, and almost every video platform and editing app can read it.
This is what the SRT file generator on this page produces:
1 00:00:00,000 --> 00:00:03,840 Welcome back to the show. Today we're talking about sleep. 2 00:00:04,120 --> 00:00:08,960 Most of us get less than we need, and the reasons might surprise you.
How to add the SRT file to your video
Once you've downloaded the .srt file, attach it to your video in whichever tool you publish or edit with:
- YouTube: in YouTube Studio open Subtitles, pick the video and language, choose Upload file, select "With timing" and upload the .srt.
- Premiere Pro: import the .srt like any other media file and drag it onto the timeline above your video; it becomes an editable captions track.
- DaVinci Resolve: use File → Import → Subtitle, then drag the subtitle clip onto the timeline.
- VLC and most desktop players: name the .srt exactly like the video file (talk.mp4 and talk.srt) and keep both in the same folder, or use Subtitle → Add Subtitle File.
- Social platforms: Facebook and LinkedIn accept SRT uploads on video posts; for TikTok and Instagram, burn the captions in with a video editor such as CapCut, which can import SRT on desktop.
Getting clean captions before you export
Every line in the transcript is editable. Fix names, brand terms and technical words first, since those are what speech recognition gets wrong most often. The edits go straight into the SRT and VTT downloads; the timing stays as it was.
Each caption is one spoken phrase. Most of the time that is a comfortable length to read, but a fast speaker can produce a caption that is longer than the two short lines subtitle style guides recommend. Shorten the wording of those lines if they will be shown on a small phone screen.
For audio with loud music or background noise, run the file through the voice isolator first. Cleaner speech gives more accurate text and tighter timing.
Free audio to SRT converter: what you can do without paying
You don't need an account to try it: upload up to 3 files a day, each up to 10 minutes long. Signing in with Google (free) gives you 120 free minutes a month and files up to 30 minutes, which covers most podcast episodes and YouTube videos.
Beyond the free minutes, transcription uses 1 credit per 5 minutes of audio: the Starter plan (from $4.92 a month, billed yearly) covers about 1,000 minutes a month, and every plan's credits work for both transcription and text to speech. Paid plans allow files up to 60 minutes.
There is no watermark, no cap on how many captions a file can have, and no separate charge for the SRT, VTT or TXT download. The one thing to remember: transcripts aren't stored on our side, so download the file before you close the tab.
When people convert audio to SRT
Podcasters turn an episode's audio into an SRT file so the video version on YouTube has captions without anyone typing them. Video editors who record the voiceover separately use the audio file to get captions, then line them up with the edit. Teachers and course creators caption recorded lectures so students can read along or search for a topic. And anyone publishing short clips on social media adds captions because most people watch with the sound off.
In each case the starting point is a separate audio file rather than a finished video, which is why this page takes MP3, WAV and M4A directly. If you only have the video, the video to SRT converter does the same job straight from an MP4.
Audio to SRT in other languages
The speech model recognises 99 languages and detects the language automatically, or you can pick it from the menu for short clips where detection has little to go on. Tick Translate to English to get English subtitles for a recording in another language, with the original timing, which is a quick way to subtitle an interview or a lecture for an English-speaking audience.
Audio to SRT Converter FAQ
What's the difference between SRT and VTT?
Both are timed caption formats. SRT is the most widely supported (YouTube, video editors); VTT is used by web players. Download whichever you need — both come from the same transcript.
Can I translate the subtitles to English?
Yes — tick Translate to English and the SRT will be in English with the original timing.
Which audio files can I convert to SRT?
MP3, WAV, M4A, AAC, OGG and FLAC, plus video files such as MP4, MOV and WEBM. The file is decoded in your browser, so only the audio track is sent for transcription.
How accurate are the subtitles?
On clear speech in a common language, most lines need no changes. Accuracy drops with heavy accents, overlapping speakers, music under the voice and specialist vocabulary, so read through the transcript and fix any errors before you export.
Will the SRT file work on YouTube?
Yes. The file is standard SRT in UTF-8, so YouTube, video editors and players read accented letters and non-Latin scripts correctly. Upload it as a subtitle file "with timing".
Is it really free without signing up?
Yes. Without an account you can transcribe files up to 10 minutes, 3 files a day. A free account gives you 120 free minutes every month and files up to 30 minutes. After the free minutes, transcription uses 1 credit per 5 minutes of audio, and paid plans allow files up to 60 minutes.
Do you keep my recording or transcript?
No. Your file is converted in your browser and sent in short pieces for transcription; we don't store the audio or the text. Download your transcript before closing the page.