Turn timed lines of text into a properly formatted .srt subtitle file.
The SRT format looks simple until you write one by hand. Sequence numbers must be consecutive. Timestamps need the exact 00:00:00,000 shape, with a comma before the milliseconds rather than a full stop. Get one character wrong and the player rejects the entire file, usually without telling you which line broke it.
This SRT file generator handles that formatting for you. You supply the words and the timings in plain seconds; it produces a valid .srt file.
Each subtitle line takes three inputs:
Press Add line for each new caption. The tool converts your seconds into correct SRT timestamps, numbers the sequence, and assembles the file structure automatically.
Entering 12.5 and 3 is considerably easier than typing 00:00:12,500 --> 00:00:15,500 sixty times without an error.
If you have ever opened a .srt file in a text editor, the pattern is: a sequence number, then a timestamp line with a start and end separated by an arrow, then the caption text, then a blank line before the next entry.
The two details that break files most often are the comma before milliseconds and the blank line between entries. Because those are generated here rather than typed, that whole category of error disappears.
The output is standard .srt (SubRip), which is supported by YouTube, VLC, and virtually every video platform and player in use. Upload it alongside your video, load it in a player, or hand it to an editor.
Copy the text directly, or download the .srt file — both options sit beneath the editor.
People searching for how to add subtitles to a video usually expect one tool to do everything. In practice it is two stages, and separating them gives you better results.
Stage one is the subtitle file. That is what this tool produces — the text and the timing, in a format players understand.
Stage two is attaching it. For YouTube, upload the .srt in the subtitles section of your video. For a local file, most players load a .srt automatically if it sits in the same folder with the same filename. For burned-in captions, import the .srt into your video editor.
The advantage of this order is that your captions stay editable. Burned-in text is permanent; a subtitle file can be corrected, translated, or swapped without re-exporting the video.
A marketer has a 90-second product demo destined for social feeds, where most viewers watch with the sound off. Captions are not optional.
She plays the clip with a stopwatch and notes roughly when each sentence begins, then enters each line: start 0, duration 4, "Here's how the dashboard works." Start 4, duration 3, "Everything lives on one screen." She works through fifteen lines, downloads the .srt, and uploads it with the video.
Fifteen minutes of work, and the video now makes sense to the majority of people who will see it.
Writing SRT by hand means tracking sequence numbers, converting every timing into hours-minutes-seconds-milliseconds, and getting the punctuation exactly right — across dozens of lines, with no error tolerance. One malformed timestamp invalidates the file, and finding it means reading the whole thing.
Entering seconds and letting the tool build the structure removes the tedious half of the job entirely.
Video creators captioning short-form content. Marketers preparing sound-off social clips. Educators subtitling lecture recordings. Accessibility teams meeting caption requirements. Anyone who needs to add subtitles to a video free of licensing costs or software installs. Already have a video with captions? The YouTube Transcript Extractor pulls existing text, including as SRT.
Captions decide whether a sound-off viewer stays or scrolls. Enter your lines and timings in the SRT file generator above, download a properly formatted .srt, and attach it to your video in minutes.
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