Media · Productivity
Caption File
Check
Check subtitle and caption files in chat
Caption File Check runs the same live engine here and in your assistant
Live playground
Use Caption File Check now
Paste a public caption-file URL and get real spec-parser conformance, cue timing, encoding, and reading-speed evidence — or align two tracks and see the drift.
Your usage
—
Free forever — create a free account for a bigger monthly allowance that follows you across every app and every assistant.Pooled across every app and surface. Manage usage
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Marketplaces
Open Caption File Check where you already work — every listing runs the same live engine as this page.
- Marketplace listings are on the way. Meanwhile, point any MCP-compatible assistant straight at the live endpoint:
https://powmcp.com/caption-file-check/mcp
Proof
Real apps.Real engines.Real results.
- Application
- Caption File Check
- Category
- Media
- Platform
- Web
Engine Anatomy
Proof
Caption File Check
What it does
Check subtitle and caption files in chat
Preflight a WebVTT, SRT, or TTML/IMSC caption file — attached in chat or from a public URL — with real spec-parser conformance, cue timing and overlap, encoding and BOM, and platform reading-speed (CPS) evidence, or align two tracks and flag cue-count and timing drift under identical limits.
Tools in this application
Caption Check
caption_check
caption_check
Caption Compare
caption_compare
caption_compare
0USD
Free to use with fair-use rate limits.
Caption File Check questions
Scope and boundaries for Caption File Check.
01What does Caption File Check actually check?
Preflight a WebVTT, SRT, or TTML/IMSC caption file — attached in chat or from a public URL — with real spec-parser conformance, cue timing and overlap, encoding and BOM, and platform reading-speed (CPS) evidence, or align two tracks and flag cue-count and timing drift under identical limits.
02What does it never do?
It reports what its pinned engine measured and nothing more — it does not judge quality, correctness of your underlying business decisions, or anything outside its stated scope, and it never fabricates a result.
03What does it cost?
Nothing. Every published app is free to use with fair-use rate limits.
04Can my assistant connect directly?
Yes — any MCP-compatible assistant can connect straight to the canonical endpoint: https://powmcp.com/caption-file-check/mcp. Marketplace listings are conveniences over the same live engine.