SRT Subtitle Generator

What is an SRT file?

SRT (SubRip) is the most widely supported subtitle format: a plain-text file of numbered cues, each with a start and end time (00:01:02,500 --> 00:01:05,000) and the line of text.

What the file looks like

1
00:00:00,000 --> 00:00:03,200
Today we continue from the last session.

2
00:00:03,200 --> 00:00:06,900
Price is the signal, not the cause.

Where it's used

• YouTube Studio and Vimeo uploads
• Premiere Pro, DaVinci Resolve, Final Cut (via import)
• VLC, MPV and most desktop players
• LinkedIn and Facebook video uploads

Tips

• Cues follow the speech segments the model detects. Very long sentences become long cues — split them in any subtitle editor if a platform enforces line limits.
• SRT has no styling. If you need positioning or colours, convert to another format after editing.
• Select another language to get a translated SRT; select the spoken language for untranslated subtitles.

Anatomy of a cue

An SRT file is plain text made of cues separated by blank lines. Each cue is laid out like this:

First line

the cue number: 1, 2, 3 and so on, in order

Second line

start and end time as hours:minutes:seconds,milliseconds with an arrow between them, e.g. 00:00:04,100 --> 00:00:07,350

Next line or lines

the subtitle text, usually one or two lines

Blank line

closes the cue; without it many players merge two cues into one

Three details cause most broken files: the separator before milliseconds is a comma (the period is WebVTT's convention), hours are always written even when they're 00, and the arrow needs a space on each side. Formatting is limited to a few HTML-like tags such as <i> for italics, which many players honour and some platforms strip. Most players don't care whether cue numbers run without gaps, but some upload validators do, so renumber after deleting cues.

How mydubly's SRT is produced

Cues come from the speech segments found during transcription, so a cue starts when a phrase starts and ends when it ends rather than at fixed intervals. Which text you get depends on the mode:

• Transcript mode with the spoken language selected: untranslated subtitles in the spoken language.
• Transcript mode with a target language: the same segmenting, with each cue's text translated.
• Dub mode: the SRT follows what the AI voice actually says, including lines shortened to fit the timing, so it matches the dubbed audio rather than a literal translation of the original speech.

The SRT is always a separate file and the picture itself is never changed, so viewers can switch subtitles off and you can keep editing them after publishing.

Editing without breaking the file

• Use a plain-text editor or a dedicated subtitle editor such as Subtitle Edit or Aegisub, not a word processor, which can insert smart quotes and change line endings.
• Save as UTF-8. Accented letters and Cyrillic, Arabic or Chinese characters turn into gibberish when an SRT is re-saved in a legacy encoding; strange characters in subtitles explains the fix.
• If you trim an intro from the video after making subtitles, shift every cue with the editor's timing-offset tool instead of retyping hundreds of timestamps.
• Check reading speed after translating. Translated lines can run longer than the original, and many style guides cap characters per second, so split or condense cues that flash past.

How to edit an SRT file goes through each step.

Getting it to show up

Upload forms on YouTube, Vimeo and LinkedIn take the .srt directly; the YouTube subtitles workflow covers language tracks there. Desktop players such as VLC and MPV load subtitles automatically when the file sits beside the video with the same base name (lecture.mp4 and lecture.srt), and many media servers read a language code before the extension, as in lecture.es.srt. Editors import SRT as a caption track you can restyle. To carry subtitles inside the video file, MKV accepts SRT as it is, while MP4 needs it converted to its own text-track format while muxing (in ffmpeg, the mov_text subtitle codec does this). When a platform rejects the file, SRT file not working lists the usual causes, and for web players built on WebVTT see the VTT generator.

What a subtitle track costs

Subtitles are priced as transcription. A 25-minute video costs 25 credits (2.5¢) for an SRT in the spoken language, and each further language is another run at the same price. A 3-minute clip is billed at the 5-credit minimum, 5 credits (0.5¢). Dubbing the 25-minute video costs 1,250 credits ($1.25) and includes an SRT matched to the new voice.

Using the tool on this page

• The spoken language is detected automatically; you select the output language — the spoken language itself for an untranslated transcript, or another language for a translation. Files can be up to 2 hours long.
• Only the audio is sent for processing — the video stays on your device — and audio and text are deleted within 30 minutes of delivery (how files are protected).
• You can download a timestamped transcript, subtitles (SRT and VTT) and plain text. Every output, step and limit is explained on the subtitle generator page.