SRT to VTT Subtitle Converter
Convert subtitles between SubRip (.srt) and WebVTT (.vtt) — both directions, auto-detected. Runs entirely in your browser; nothing is uploaded.
What this tool does
Converts subtitle files between the two most common plain-text formats —
SubRip (.srt) and WebVTT (.vtt) — in either direction. Paste your
subtitles, and the converter detects the format and produces the other one:
SubRip for media players and re-encoding, WebVTT for the HTML5 <track>
element and the web. Nothing is uploaded — it runs entirely in your browser,
works offline, and needs no sign-up.
How to use it
- Paste the full contents of your
.srtor.vttfile into the box. - Leave Direction on auto to detect the input format and convert to the other, or force SRT → VTT / VTT → SRT.
- Copy the converted subtitles from the output and save them with the matching
extension (
.vttor.srt).
SRT vs WebVTT — what actually changes
The two formats are almost identical line-oriented cue lists. The converter rewrites only what differs:
SubRip (.srt) | WebVTT (.vtt) | |
|---|---|---|
| Timestamp separator | comma — 00:00:01,000 | period — 00:00:01.000 |
| File header | none | a leading WEBVTT line |
| Hours field | always HH:MM:SS | HH:MM:SS or short MM:SS |
| Cue settings | not supported | optional, e.g. line:90% align:center |
Going SRT → VTT adds the WEBVTT signature and switches commas to periods.
Going VTT → SRT strips the WEBVTT header block, switches periods to
commas, expands any short MM:SS.mmm timestamps to full HH:MM:SS,mmm, and
drops WebVTT cue settings (SubRip has no equivalent). Cue numbers and the
dialogue text are always kept verbatim, and Windows (\r\n) or Unix (\n)
line endings are preserved.
Examples
SRT → VTT
1
00:00:01,000 --> 00:00:04,000
First line.
becomes
WEBVTT
1
00:00:01.000 --> 00:00:04.000
First line.
FAQ
Which format do I need?
Use WebVTT (.vtt) for subtitles shown in a web
browser via the HTML5 <track> tag. Use SubRip (.srt) for desktop media
players (VLC, MPV), uploading to most video platforms, and muxing into a video
file.
Does it change the timing?
No. Only the timestamp format changes (comma vs period); the actual times stay the same, so the subtitles stay in sync.
What about WebVTT styling and positioning?
Cue settings after the timestamp
(like line:90% or align:center) are dropped when converting to SRT, because
SubRip doesn't support them. WebVTT styling blocks (STYLE, NOTE) in the
header are removed too. Going the other way, SRT has no cue settings to add.
Is my file uploaded anywhere?
No. The conversion happens locally in your browser, so your subtitles never leave your device, and it keeps working offline once the page has loaded.
What format does it expect?
Standard SubRip or WebVTT: a cue number
(optional in VTT), a --> timing line, then one or more lines of text, with a
blank line between cues.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool srt-to-vtt "1
00:00:01,000 --> 00:00:04,000
First line of dialogue."New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/srt-to-vtt/?subtitles=1%0A00%3A00%3A01%2C000%20--%3E%2000%3A00%3A04%2C000%0AFirst%20line%20of%20dialogue.&direction=autoMachine-readable descriptor: tool.json — title + parameters JSON Schema for agents.