Free tool · runs in your browser

Live Subtitle Preview

Paste an SRT and a YouTube URL to see your captions overlaid on the real video, synced to the player's actual playback time. Tune font size, color, background opacity, and vertical position to validate a caption look before you commit it.

Paste a YouTube URL above to load the video, then play it — captions overlay in real time.
Vertical position

0 cues parsed. The overlay tracks the YouTube player's real playback time — press play in the video to preview. This is a preview only; nothing is exported.

How to use this tool

  1. 01

    Paste the SRT and the YouTube URL

    Captions overlay on the embedded video and track its real playback time.

  2. 02

    Adjust styling

    Test font size, text color, background opacity, and vertical position against the footage.

  3. 03

    Use this to validate before burning in

    Once the styling looks right, commit it with the Burn-In Captions tool.

Why this matters

Caption styling decisions are easy to get wrong in the abstract — a font size that looks fine in an editor can be unreadable over a busy shot, and a caption pinned to the bottom can collide with on-screen graphics. Checking the look against the actual video, at the actual playback time, is the only reliable way to catch this before it ships.

This tool overlays your SRT on the real YouTube player (via its IFrame API) so the captions move with the video, and the style controls mirror what you'd set when rendering. It exports nothing by design — once the look is right, hand it to the Burn-In Captions tool to commit it to a file.

Related tools

Burn-In Captions

Burn SRT captions into video frames in your browser with custom font size, color, background, and position. Plays everywhere, even muted. No upload.

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Caption Formatter

Free caption formatter — paste a raw transcript or SRT file and get clean, readable caption blocks at the line length you choose. In your browser.

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SRT to VTT

Convert SubRip (.srt) caption files into WebVTT (.vtt) for HTML5 <track> tags. Comma-to-period millisecond conversion, WEBVTT header included.

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FAQ

No — this is a visualization tool only. It previews how a caption style looks over the real video but produces no file. To bake the styled captions permanently into a video, use the Burn-In Captions tool.

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