Check your SRT
What belongs in an SRT cue?
A cue contains a number, a start/end timing line and subtitle text. Separate cues with a blank line. For example, 00:00:01,000 --> 00:00:03,500 displays text from 1 to 3.5 seconds; a comma precedes milliseconds.
This checker accepts multiline text, Windows or Unix line endings and a UTF-8 BOM. SRT has no single character encoding convention. File reading here uses UTF-8; convert other encodings in a text editor first. SubtitleVideo currently writes its SRT exports as UTF-8.
Download original and translated examples
These files were hand-written for this guide to demonstrate structure and naming. They are not app-generated transcripts or accuracy test results. They use the same timing for separate English and Chinese text.
Original example
1 00:00:01,000 --> 00:00:03,500 Open the video on your phone. 2 00:00:04,000 --> 00:00:07,000 Save the subtitles as a separate SRT file.
Choosing both original and translated text in SubtitleVideo creates two separate SRT files. The language suffix illustrates a selected target language; actual filenames depend on your export.
Understand the results
| Result | What to check |
|---|---|
| Timing format issue | Use hours, minutes, seconds and three-digit milliseconds, with a comma and -->. Minutes and seconds must be 00–59. |
| End time is not later than start | Review that cue against your video and correct its timing. |
| Non-consecutive numbers or overlap | These are warnings. Check missing numbers and cue order. Simultaneous speakers may intentionally overlap. |
| Format passes but nothing displays | Confirm that your player supports SRT, the track is selected and the file location and name match its requirements. |
| Garbled text or wrong sync | Check the encoding and video version. Valid structure does not prove accurate wording or synchronization. |
Need subtitles for an iPhone video?
SubtitleVideo creates SRT files from Files, Photos and SMB videos. Supported language pairs can be saved as separate original and translated files. With write permission, SMB sources can save subtitles back to the video folder.
Generate SRT on iPhone · Save subtitles to a NAS · Check the app's cumulative free allowances. This free web checker does not consume the app's subtitle generation allowance.
Format sources and scope
Basic structure follows the Matroska SRT description. See the Library of Congress SubRip format description for encoding context. This checker does not cover every player extension, styling tag or video compatibility case. It never modifies your original file.