Audio to SRT: Create, Export, and Check Subtitles with Timestamps

Converting audio to SRT means producing both a transcript and the times when each caption should appear. A readable paragraph is enough for a TXT document; a subtitle file also needs reliable start and end times. That is why a finished transcription does not always have an SRT download.

This guide explains how to export available subtitles, review them against the recording, and avoid a common editing mistake: assuming that changes to the full transcript have also changed the subtitle file.

What an audio-to-SRT file contains

An SRT file stores captions as numbered blocks. Each block contains a start time, an end time, and the words to display, followed by a blank line. Here is an illustrative example, not a measured transcription:

1
00:00:01,200 --> 00:00:03,800
Open the recording you want to review.

2
00:00:04,100 --> 00:00:06,600
Then check the names and numbers.

The first caption starts 1.2 seconds into the recording and ends at 3.8 seconds. The comma separates seconds from milliseconds. A subtitle editor or player uses these times to decide when the words appear. YouTube's supported subtitle formats documentation includes the same basic SRT structure and specifies plain UTF-8 encoding for SRT uploads.

TXT is useful when you only need the words. SRT is useful when those words need to follow the audio during playback. Renaming a TXT file cannot supply the missing timing.

Prepare the recording you will actually use

Use the audio from the version of the video you intend to publish. If you transcribe an unedited interview and later remove its opening minute, the original timestamps will no longer match the shortened video. Finish those cuts first when possible.

The web uploader accepts supported audio files, including MP3, M4A, and WAV, as well as listed video formats. Its current size limit is 500 MB. Also check your available transcription minutes: a subtitle file from a partial transcription will cover only that portion of the recording.

Keep the source file available for playback while you review the result. Captions need to match what is heard at each point, including after a pause or a change of speaker.

Export SRT when timed segments are available

1. Open the audio-to-text tool and choose automatic language detection, English, or Chinese to match the speech.
2. Select your recording to start the upload, then let the transcription complete.
3. Read any notice that only part of the file was transcribed. Check that the result covers the material you need.
4. Open Download and choose SRT — subtitles when it is available.
5. Open the downloaded SRT in a subtitle editor or a plain-text editor, then preview it with the matching media.

SRT export needs segments with valid start and end times. Some transcription results contain readable text without usable segment timing. If SRT is unavailable, download TXT for the text and use a subtitle editor to create or align captions with the recording. Do not invent equally spaced timestamps and assume they match the speech.

If you only need a document, the MP3-to-text guide covers proofreading and TXT export. You can also check the current plan details before processing a longer file.

Edit the transcript and subtitles separately

The full-text Edit and Save controls update the transcript used for TXT export. They do not rewrite the original timed segments used for SRT. A corrected name in the page's full-text view can therefore still be misspelled in the downloaded subtitles.

Review the SRT itself after downloading it. Make subtitle wording and timing changes in your subtitle editor, then save that corrected file for publishing. If you edit SRT as plain text, preserve the cue numbers, timestamp lines, and blank lines between blocks.

Keep the reviewed TXT and reviewed SRT clearly named if you need both. For example, interview-reviewed.txt and interview-reviewed.srt make it easier to identify the copies you checked, without overwriting the source recording.

Check subtitle timing before publishing

Preview the captions at the beginning, in the middle, and near the end, then watch the full video when you are preparing the final version. Spot checks can find a large offset; a full review catches errors between those points.

• Match the first spoken words. A title card, intro, or trimmed opening can put every caption out of sync.
• Check both ends of each cue. Text should arrive with the speech and remain long enough to read without lingering into an unrelated line.
• Look for dense captions. Split or rephrase difficult blocks in the subtitle editor, while preserving the speaker's meaning.
• Replay transitions. Pauses, interruptions, and speaker changes deserve a closer look.
• Inspect the final cue. Confirm that the subtitles reach the last relevant spoken line, especially if a partial-transcription notice appeared.

After importing the file into your destination, preview it there as well. This confirms that the platform accepted the file and that the version you are publishing is the one you reviewed.

Frequently asked questions

Why is SRT unavailable when I can read the transcript?

The text and its timing are separate outputs. Without valid timed segments, the site cannot generate a usable subtitle file from the transcript alone.

Will saving a corrected transcript fix my SRT?

No. Full-text changes apply to TXT, while SRT uses the original timed segments. Correct the downloaded subtitle file separately.

Does an SRT file contain the audio or video?

No. It contains caption text and timing. Keep it alongside the matching media, or import it as a subtitle file into the destination that supports it.

Can I upload SRT to YouTube?

YouTube lists basic SRT as a supported format and requires plain UTF-8 text. Check its format requirements, then preview the imported captions before publishing.

Keep the final subtitles tied to the final audio

An audio-to-SRT workflow is complete after the wording and timing have both been checked against the matching recording. Export available timed subtitles, correct the SRT itself, and preview the result with your final media. Start with your recording when it is ready.