Srt To Vtt API

POST https://api.findutils.com/api/tools/srt-to-vtt/execute

Convert SubRip (.srt) captions to WebVTT (.vtt) and back. The direction is detected from the input by default: SRT uses a comma before the milliseconds, WebVTT uses a dot and starts with a WEBVTT header. Timestamps are normalized to HH:MM:SS with three fraction digits, VTT cue settings are preserved, and NOTE and STYLE blocks are skipped. Only the format changes; the caption text is never translated or edited.

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Request body

application/json

input

string required

Caption file contents, either SubRip or WebVTT.
direction

string optional

Force a direction. Default: auto, detected from the input. One of auto · srt-to-vtt · vtt-to-srt. Default "auto".
keep_cue_numbers

boolean optional

Keep cue identifiers when writing WebVTT, where they are optional. Default: false. Default false.

Example arguments

Verified

{
  "input": "1\n00:00:01,000 --> 00:00:04,000\nHello there.\n"
}

curl -X POST https://api.findutils.com/api/tools/srt-to-vtt/execute \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": "1\n00:00:01,000 --> 00:00:04,000\nHello there.\n"
  }'

const response = await fetch('https://api.findutils.com/api/tools/srt-to-vtt/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json', Authorization: 'Bearer YOUR_API_KEY' },
  body: JSON.stringify({"input":"1\n00:00:01,000 --> 00:00:04,000\nHello there.\n"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/srt-to-vtt/execute",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"input":"1\n00:00:01,000 --> 00:00:04,000\nHello there.\n"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/srt-to-vtt/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json', 'Authorization: Bearer YOUR_API_KEY'],
    CURLOPT_POSTFIELDS => '{"input":"1\n00:00:01,000 --> 00:00:04,000\nHello there.\n"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call srt_to_vtt from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: API key
REST id: srt-to-vtt
MCP name: srt_to_vtt
Category: Media
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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