What are subtitles and why do they matter?

Subtitles are timed text overlays synchronized with video content that display dialogue, narration, or sound descriptions. They serve multiple critical purposes: making videos accessible to deaf and hard-of-hearing viewers, enabling content consumption in sound-sensitive environments, helping language learners understand foreign content, and improving video SEO. Professional subtitle files use standardized formats like SRT (SubRip) and WebVTT (Web Video Text Tracks) that encode precise timing information—down to milliseconds—to ensure text appears and disappears at exactly the right moments during playback.

Tool Description

This subtitle editor online provides a complete environment for creating, editing, and synchronizing subtitle files with video content. Upload existing SRT or WebVTT subtitle files, or create new ones from scratch using this free online SRT editor. The tool features a side-by-side video preview with real-time subtitle overlay, allowing you to edit subtitles and see exactly how they'll appear to viewers. Use the subtitle timing editor to adjust timestamps with millisecond precision, modify subtitle text, add new entries, or delete unwanted ones. The synchronized playback automatically highlights the current subtitle as the video plays, making it easy to verify timing accuracy. Export your finished work in either SRT or WebVTT format for use across different video platforms.

Features

  • Dual Format Support: Import and export subtitle files in both SRT (SubRip) and WebVTT formats with this online SRT editor
  • Video Preview: Upload videos in MP4, WebM, or OGG format to preview subtitles in real-time as you edit
  • Synchronized Playback: Video and subtitle list automatically sync—clicking a subtitle seeks the video to that timestamp

Supported Formats

Import Formats:

  • SRT (SubRip Text) - .srt
  • WebVTT (Web Video Text Tracks) - .vtt

Export Formats:

  • SRT (SubRip Text) - .srt
  • WebVTT (Web Video Text Tracks) - .vtt

Video Formats:

  • MP4 - .mp4
  • WebM - .webm
  • Ogg - .ogg

Timing Format

All subtitle timing uses the format: HH:MM:SS,mmm

  • HH: Hours (00-99)
  • MM: Minutes (00-59)
  • SS: Seconds (00-59)
  • mmm: Milliseconds (000-999)

Example: 00:01:23,456 = 1 minute, 23 seconds, and 456 milliseconds