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WebVTT to SubRip (VTT to SRT) Converter
x402
WebVTT to SubRip (VTT to SRT) Converter is a paid API for AI agents from toolshed.lemon-agent.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Converts a WebVTT (.vtt) subtitle file to SubRip (.srt) format, renumbering cues from 1 and expanding timestamps to hh:mm:ss,mmm while stripping unsupported blocks.
Price / call$0.002
Success—
StatusUnknown
How this service works
WebVTT to SubRip. POST a .vtt file; the response is an .srt file. Cues are renumbered from 1 and hour-less timestamps are expanded to hh:mm:ss,mmm. The WEBVTT header, NOTE/STYLE/REGION blocks and per-cue settings are dropped, because SubRip cannot express them. Input that does not begin with WEBVTT is refused.
Output
A plain-text SubRip (.srt) file where cues are sequentially renumbered starting from 1, timestamps are fully expanded to hh:mm:ss,mmm format, and all VTT-specific constructs (WEBVTT header, NOTE/STYLE/REGION blocks, per-cue settings) are removed. Returned as application/x-subrip content.
Example use cases
Video player subtitle compatibility fix
“I have a .vtt caption file from a web video but my media player only accepts .srt — can you convert it to SubRip format for me? Here's the full WebVTT content.”
Editing suite subtitle import
“My video editing software doesn't support WebVTT, only SubRip. Please convert this .vtt file I have into a proper .srt so I can import it into my timeline.”
Localization pipeline subtitle normalization
“We're preparing subtitles for distribution and the downstream system requires SRT files. Convert this WebVTT subtitle file to SubRip — make sure cues are renumbered from 1 and timestamps use the full hh:mm:ss,mmm format.”
Technical details
Endpoint
POSThttps://toolshed.lemon-agent.dev/convert/vtt-srtWhen to prefer
Use this endpoint when you need a straightforward, standards-compliant VTT-to-SRT conversion without any manual parsing. It handles timestamp expansion, cue renumbering, and stripping of VTT-only metadata automatically. Ideal for pipelines where downstream tools (video editors, media players, distribution platforms) require SubRip format. Prefer this over manual regex-based conversion or general-purpose text processors since it correctly handles edge cases like hour-less timestamps and multi-line cues.
Side effects
- Input does not begin with 'WEBVTT' — request is refused with an error
- Input exceeds 256 KB — rejected due to size limit
- Malformed VTT cue timestamps — may produce garbled or missing cues in output
- Empty VTT file with no cues — returns empty or minimal SRT
- Non-text body submitted — rejected as invalid input type
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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