Repair common SRT structure without rewriting subtitle dialogue.
Repair SRT numbering, blank lines, timestamps, and cue order locally in your browser.
The SRT formatter parses subtitle blocks, repairs numbering and formatting where possible, orders cues by time and reports the changes.
3 00:00:03,000 --> 00:00:05,000
1 → 2 → 3
The formatter repairs structure it can parse; it does not invent missing dialogue or timing.
1 00:00:01.000 --> 00:00:02.000
00:00:01,000 --> 00:00:02,000
Cue text is retained while valid cues are normalized and ordered.
Hello world
Hello world
The formatter repairs structure it can parse; it does not invent missing dialogue or timing.
Processing happens locally in this browser. Your text or file is not uploaded to LumaTool servers.
Repair an SRT rejected by an editor.
Normalize a hand-edited subtitle file.
Prepare consistent SRT before delivery.
3 00:00:03,000 --> 00:00:05,000 1 00:00:01.000 --> 00:00:02.000 Hello world
The formatter repairs structure it can parse; it does not invent missing dialogue or timing. Cue text is retained while valid cues are normalized and ordered.
Processing happens locally in this browser. Your text or file is not uploaded to LumaTool servers.
Choose only the options needed to turn SRT subtitle content into the repaired SRT and report; the defaults preserve the least surprising behavior.
Review validation messages and compare a representative sample before using the result in production.
Yes. The workspace and result controls adapt to desktop and mobile browsers.
Expecting irrecoverable timestamps to be guessed. Using formatter output without reviewing the report.
Processing happens locally in this browser. Your text or file is not uploaded to LumaTool servers.
Clean subtitle text, remove tags, normalize whitespace, and keep cue timing.
Use Now SShift SRT and VTT subtitle timings forward or backward locally.
Use Now VConvert WebVTT captions to SRT subtitle format locally.
Use Now SConvert SRT subtitle files to WebVTT locally in your browser.
Use Now SMerge short subtitle fragments into natural cues while preserving earliest start and latest end times.
Use Now