The SRT file format: what is inside an .srt, line by line.

An SRT (SubRip) file is a plain text file of subtitles: a number, a time range and the words, repeated. It is the format almost every video platform and editor accepts. Make one from a recording in the box below, or read on for the rules.

Plain text, opens anywherehh:mm:ss,mmm timecodesAccepted almost everywhereMake one below

How it works

How to create an SRT file in three steps.

1

Upload a recording

Drop a video or audio file into the box, or paste a link. Typing timecodes by hand is the slow way.

2

Check the text

Read it through and fix anything misheard. The timing is measured from the audio.

3

Download .srt

Save the file. It opens in any text editor and uploads to any video platform.

Anatomy

Four parts per cue, in a fixed order.

Every subtitle in an SRT is a block, called a cue, with:

  1. A sequence number on its own line, starting at 1.
  2. A time range: start, the arrow --> with a space each side, end. Times are hours:minutes:seconds,milliseconds, with a comma before the milliseconds.
  3. The text, on one or more lines.
  4. A blank line, which ends the cue.

That is the whole format. There is no header, no language field and no styling section. A few players honour simple tags such as <i> for italics; many ignore them, so do not rely on tags.

The file extension is .srt. Save it as UTF-8 so accented letters and non-Latin scripts display correctly; an SRT saved in an old regional encoding is the usual cause of garbled characters.

Rules that break players

Small mistakes with large effects.

Good practice beyond the format itself: about two lines of up to 42 characters, on screen between one and seven seconds. A file generated from speech follows the speaker's phrasing, so some cues will be longer; split them in a subtitle editor for broadcast-style results. More on length and pace in caption reading speed.

SRT or VTT? They hold the same cues. Browsers need VTT; nearly everything else takes SRT. See SRT vs VTT and the VTT file format, or convert with SRT to VTT.

Sample output

What the SRT file looks like.

1
00:00:34,680 --> 00:00:46,500
fourscore and seven years ago our fathers brought forth upon this continent a new nation conceived in in liberty, and dedicated to the proposition

2
00:00:46,500 --> 00:00:50,300
that all men are created equal.

3
00:00:50,300 --> 00:00:57,500
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived

4
00:00:57,500 --> 00:01:01,620
and so dedicated, can long endure.

5
00:01:01,620 --> 00:01:07,920
We are met on a great battlefield of that war we have come to dedicate a portion of that field

6
00:01:07,920 --> 00:01:14,240
as a final resting place for those who here gave their lives that their nation might live

7
00:01:15,360 --> 00:01:18,800
it is altogether fitting and proper that we should do this

Real output, unedited: a public-domain LibriVox reading of the Gettysburg Address (2 min 41 s) transcribed here in October 2026. The repeated word and the missing capitals are what came back; you would fix those on the transcript before downloading.

Before you rely on it

What the subtitle file is, and what it is not.

One cue per spoken phrase

Each cue is a phrase from the transcript with its start and end time. Most run a few seconds. A passage spoken without a pause can come out as one long cue of up to about half a minute, so split those in your editor if your platform wants two short lines at a time.

Timing comes from the audio

Cue times are taken from the recording itself, so the file lines up with the video or audio you uploaded. If you trim the start of the video afterwards, shift the cues by the same amount in your editor.

Fix a line before you download

Open the transcript, correct a misheard name or number on its line, and the SRT and VTT you download carry the correction with the timing unchanged.

A plain file, not a styled video

You get the subtitle file. Fonts, colours, position and captions drawn into the picture are done in your video editor or player, which reads this file.

Accuracy we measured

On public test recordings, about 7 words in 100 differed from the reference for clean English read speech, between 4 and 9 in 100 for Spanish, Portuguese, Russian, French and German, and about 21 in 100 for Hindi. Noisy rooms, music and crosstalk do worse. Method and every number: the benchmark.

Limits

Up to 10 hours or 5 GB per recording. The box on this page takes files up to 500 MB; larger ones continue on the upload page. 99+ languages, detected automatically.

Pricing

What generating an SRT costs

The preview is free. When the full transcript needs a pack, one-time packs are $4 for 500 minutes, $8 for 1,000 minutes, $12 for 2,000 minutes, $24 for 5,000 minutes. Credits never expire, which comes to about $0.29 to $0.48 per hour of audio.

Recording$4 or $8 pack$12 pack$24 pack
5-minute video$0.04$0.03$0.02
30-minute video$0.24$0.18$0.14
2-hour recording$0.96$0.72$0.58

Figures are the share of a pack each recording uses. A button opens secure checkout for that pack. Every export format is included; full details on the pricing page.

FAQ

The SRT format, answered.

What is an SRT file?

An SRT file is a plain text subtitle file. It lists numbered cues, each with a start and end time and the text to show, separated by blank lines. The extension is .srt and the name comes from the SubRip program.

How do I open an SRT file?

With any text editor, such as Notepad or TextEdit, to read or edit it. To see it with a video, open the video in VLC and load the SRT from the Subtitle menu, or give both files the same name in the same folder.

How do I make an SRT file?

Upload the video or audio in the box on this page and download the SRT made from its speech. You can also type one by hand in a text editor following the number, time range, text, blank line pattern.

What is the SRT timecode format?

hours:minutes:seconds,milliseconds, for example 00:01:15,360 --> 00:01:18,800. The milliseconds follow a comma, and the arrow has a space on each side.

What is the difference between SRT and VTT?

Both hold timed subtitle cues. VTT starts with a WEBVTT header and uses a full stop before milliseconds; SRT numbers its cues and uses a comma. Browsers require VTT; most platforms and editors accept SRT.

Subtitles and captions

Every page in this set uses the same upload box and the same export. All subtitle pages

Closest to this page

Formats and rules

Make subtitles

From a link or a file

WebVTT

For a platform or an editor

Convert a subtitle file

By language

Make an SRT from a recording.

Free preview. Drop a file, download the .srt; packs from $4.