How to convert SRT to VTT?

Drop your .srt file, select VTT as output, click Download. Conversion happens instantly in your browser — no upload.

How to shift subtitle delay?

Load subtitles, go to Shift tab, enter delay in ms (e.g. +500ms or -1000ms) and click Apply. All timestamps are adjusted.

Are my subtitles uploaded?

No. Everything runs locally using JavaScript. Your .srt and .vtt files never leave your device.

Subtitle Toolkit — SRT to VTT Converter

Convert SRT ↔ VTT, shift subtitle delay, merge and clean — 100% in your browser. No upload.

🔒 No upload ⚡ Instant 🎯 Frame-accurate 🧹 No ads in tool

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Drop .srt, .vtt, .txt here or click to browse

Supports multiple files — we'll merge them intelligently. Pure text processing.

Or paste subtitle text:

Cues — editable

SRT ↔ VTT Converter

SRT uses comma 00:00:01,000, VTT uses dot 00:00:01.000 and WEBVTT header. We handle it perfectly.

Output format

Filename

Preview

No cues yet

Shift subtitle delay

Fix out-of-sync subtitles. Positive = delay, negative = earlier.

Delay (ms)

Delay (sec)

Speed / stretch (fix FPS drift)

1.0 = normal. 0.9 = slower, 1.1 = faster. Anchor = first cue.

First cue should start at

Merge files

Load 2+ files above. Choose how to combine.

Concatenate
File 2 starts after File 1 ends Merge & sort by time
Interleave cues chronologically Concatenate + 1s gap
Add 1 second between files

Tip: For multi-part movies, use Concatenate. For dual languages, use Merge & Sort.

Clean & fix

All cleaning is reversible via undo (Ctrl+Z in browser) if you re-paste, but we keep it safe — no cue is deleted unless you click.

Ctrl+Enter download Click time to edit

Why this subtitle toolkit?

SRT to VTT, VTT to SRT

SRT is classic (SubRip), VTT is modern for HTML5 video. This tool converts with 100% timecode accuracy, preserving line breaks and handling malformed files from auto-generators.

Shift subtitle delay

Audio out of sync? Shift by milliseconds or seconds. Quick buttons for ±0.5s, ±1s, ±5s — the exact terms people search. Also stretch for FPS drift (23.976 → 25).

Merge & clean

Combine multi-part subtitles, remove hearing-impaired tags, strip HTML styling, fix overlaps. Built for creators who need clean captions for YouTube, Vimeo, and OTT.

How to use

Drop .srt or .vtt files — or paste text. We auto-detect format.
Edit cues if needed — click timecodes or text.
Go to Shift to fix delay, Merge to combine files, Clean to strip formatting.
Choose output format (SRT or VTT) and Download. All processing stays on your device.

Subtitle Toolkit — SRT to VTT Converter

Cues — editable

SRT ↔ VTT Converter

Shift subtitle delay

Merge files

Clean & fix

Why this subtitle toolkit?

SRT to VTT, VTT to SRT

Shift subtitle delay

Merge & clean

How to use

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