Subtitle Generator
Create and edit subtitles with a live video overlay editor. Export to SRT, VTT, or ASS format.
Drop a video to subtitle, or browse files (optional)
You can also create subtitles without a video. Upload is optional for preview only.
Caption List (0 entries)
New Caption
Export Format:
Preview:
How to Create Subtitles
- Optionally upload your video for a real-time preview.
- Click Add Caption to enter text and start/end timestamps.
- Repeat for each caption. Use Import SRT to load an existing file for editing.
- Choose your export format (SRT, VTT, ASS) and click Download Subtitle File.
Subtitle Format Guide
| Format | Extension | Best For |
|---|---|---|
| SRT | .srt | Universal — works with YouTube, Vimeo, VLC, most platforms |
| WebVTT | .vtt | HTML5 `<track>` element, web players, Vimeo |
| ASS/SSA | .ass | Advanced styling — anime fansubs, desktop players |
| Plain Text | .txt | Transcripts, accessibility documents |
Why Add Subtitles to Your Video?
Subtitles and captions significantly expand your video's reach and impact. According to Verizon Media research, 69% of people watch video with the sound off in public. Captions make your content accessible and searchable.
Accessibility
Captions are required by law in many contexts and allow deaf and hard-of-hearing viewers to fully experience your video content.
Global Reach
Add subtitle files in multiple languages to reach international audiences without re-recording audio.
SEO Benefits
YouTube indexes subtitle text, making your video searchable for every word spoken. Videos with captions rank higher and get more views.
Social Media
Most social media video plays silently by default. Captions ensure your message comes through even without sound.
Frequently Asked Questions
What SRT time format should I use?
SRT uses the format HH:MM:SS,mmm (hours:minutes:seconds,milliseconds). For example, 1 minute 30.5 seconds = 00:01:30,500. WebVTT uses a dot instead of a comma: 00:01:30.500.
Can I edit an existing subtitle file?
Yes — click "Import SRT" to load an existing .srt or .vtt file. The captions will load into the editor for modification.
How do I add subtitles to a YouTube video?
Upload your video to YouTube Studio, go to Subtitles, click "Upload file", and select your .srt file. YouTube will automatically sync the text to your video's timeline.
What's the difference between subtitles and captions?
Subtitles translate dialogue for viewers who speak a different language. Captions describe all audio content (dialogue, sound effects, music cues) for viewers who cannot hear the audio at all.
Frequently Asked Questions
What subtitle formats does this tool create?
You can export subtitles as SRT (SubRip — the most universal format, compatible with almost every video player), VTT (WebVTT — the web standard for HTML5 video), and ASS (Advanced SubStation Alpha — supports rich styling).
Can I add subtitles to an existing subtitle file?
Yes — import an existing SRT or VTT file and the tool will load your existing cues for editing. Add, remove, or modify any entry and re-export.
How do I sync subtitles to video?
Load your video file and your subtitle entries side-by-side. Click any subtitle entry to jump the video to that timestamp. Adjust start and end times using the time fields or by clicking within the video preview.
Can this tool auto-generate subtitles from speech?
Not currently — this tool is a manual subtitle editor with video preview. Automatic speech-to-text requires server-side AI processing. For auto-generated subtitles, try YouTube's auto-captions or Whisper AI.
Are my video files uploaded to a server?
No. The video is loaded locally in your browser for preview only. Subtitle files are created and downloaded entirely in your browser. Nothing is uploaded.