How to Add Subtitles to Video Online

Subtitles and captions dramatically increase how many people watch your video all the way through. A large proportion of video is watched without sound — on mobile, in a meeting, or with sound off by default. Here's how to add subtitles to any video in your browser using REQO.

Option 1: Auto-Generate Captions from Audio (Recommended)

1. Open your video in REQO.
2. Click the 'Captions' tab.
3. Click 'Auto-generate' — REQO's AI transcribes your audio and creates timed caption blocks automatically.
4. Review each caption block for accuracy. Click to edit any errors.
5. Adjust timing if any caption appears too early or too late.
6. Choose your style (font, size, position, color).
7. Choose 'Burn in' if you want captions permanently visible, or 'Soft subtitles' if you want them togglable.
8. Export.

Option 2: Upload an SRT File

If you already have a subtitle file (from a transcription service or previous project), REQO accepts SRT format. Upload it in the Captions tab and it will sync to your video automatically.

Tips for Great Captions

• Keep each caption block to 1-2 lines and under 42 characters per line.
• Make sure every speaker is captioned — not just the main one.
• Use high-contrast text (white text with a dark shadow or box) so captions are readable on any background.
• Always burn in captions if your target platform doesn't support soft subtitle tracks (most social platforms don't).