Online SRT Editor
Edit SRT subtitle files directly in your browser. Open an existing file or start from scratch — live preview shows all entries as you type.
SRT File Format Reference
An SRT file consists of numbered blocks, each containing a sequence number, a timestamp range, and one or more lines of subtitle text:
Timestamp format
Timestamps follow the pattern HH:MM:SS,mmm — hours, minutes, seconds, and milliseconds separated by a comma. The arrow --> separates start and end times.
Supported HTML tags
<i>…</i>— italic text<b>…</b>— bold text<u>…</u>— underline (limited player support)<font color="#ffffff">…</font>— text color (limited support)
Frequently Asked Questions
Can I create an SRT file from scratch?
Yes. Click "New file" to start with a blank editor, type your content following the SRT format above, and download when done.
Does the editor auto-save?
No. There is no server backend to save to. Make sure to download your file before closing the tab.
Can I edit VTT files here?
VTT and SRT are very similar in structure. You can paste VTT content and edit it, but the format validation and preview are optimized for SRT. For best results with VTT, first convert to SRT using the VTT to SRT tool.