Upload a plain text transcript and turn it into a valid SRT file with numbering, timestamps, and clean subtitle text.
Your TXT file is converted locally in your browser. No upload required.
A TXT transcript usually contains plain text only: no subtitle numbers and no valid SRT timecodes. This converter reads each text line, creates a subtitle block from it, and writes a SubRip file with continuous numbering, start time and end time.
When your text file has no timestamps, the tool treats every non-empty line as one subtitle. The display duration is estimated from the length of the text, so short lines stay on screen for less time and longer lines get more reading time.
Welcome to this tutorial.
Today we show how to create subtitles.
At the end we export an SRT file.1
00:00:00,000 --> 00:00:02,880
Welcome to this tutorial.
2
00:00:02,980 --> 00:00:06,020
Today we show how to create subtitles.
3
00:00:06,120 --> 00:00:09,120
At the end we export an SRT file.If your transcript already contains rough timings, the converter can use them as start times. Simple formats such as 00:00:05 Text, [00:12] Text, or full ranges such as 00:00:05,000 --> 00:00:08,000 Text are supported.
00:00:05 Intro and welcome
00:00:12 Today we look at SRT files
00:00:19 We will sync the subtitles later in Studio1
00:00:05,000 --> 00:00:11,900
Intro and welcome
2
00:00:12,000 --> 00:00:18,900
Today we look at SRT files
3
00:00:19,000 --> 00:00:23,200
We will sync the subtitles later in StudioWithout real audio analysis, a TXT-to-SRT converter can only create a useful timing structure. This tool estimates display duration from text length and word count. Very short lines get less time, while longer sentences get more time to read.
| Text type | Typical duration | Why? |
|---|---|---|
| Short sentence | about 2–3 seconds | A small amount of text can be read quickly. |
| Regular subtitle | about 3–5 seconds | Works well for most dialogue lines. |
| Long sentence | up to about 7 seconds | More words need more reading time. |
A TXT file normally contains no real audio information. The tool cannot know exactly when a word is spoken. The generated SRT is therefore a clean technical starting point, not a frame-accurate subtitle file.
After conversion, the SRT file is formally valid, but the timing is only estimated. For publish-ready subtitles, check the file against the video in Studio and synchronize it precisely.
This TXT to SRT converter processes your file entirely in your web browser. Your transcript is not uploaded to our servers and stays on your device.
After TXT conversion, open the generated SRT file in Subvideo.ai Studio, check it next to the video, shift subtitles, split blocks, and align timing with speech, pauses, and scene changes.
Sync in StudioUpload a plain text transcript. One short subtitle line per line works best.
The tool creates SRT timestamps automatically or uses manual timestamps at the beginning of each line.
Download the generated SRT file and sync it with your video in Studio if needed.
The tool reads every non-empty text line, creates an SRT block from it, and adds numbering, start time and end time.
Yes. Without manual timestamps, the duration of each line is estimated from text length and word count.
Yes. The tool recognizes simple start times such as 00:00:12 Text and full ranges such as 00:00:12,000 --> 00:00:15,000 Text.
Yes. Conversion runs locally in your browser. No TXT file is uploaded.
No. Without video or audio data, timing can only be estimated. For precise synchronization, check the SRT against the video in Studio.
A transcript with one short subtitle line per line works best. Split very long paragraphs into smaller meaningful sections before converting.
Yes. You can open the generated SRT in Studio, shift timings, split blocks, correct text, or burn the subtitles into the video.