Structured lines
Receive start time, duration, and cleaned text for each section.
YouTube transcript API
Transcript data built for developers.
Build caption-aware applications with structured transcript lines, language metadata, source labels, normalized video information, caching, and export-ready timing.
✓ Free transcript downloader✓ Creator captions preferred✓ Five export formats
Reliable metadata
Include video identity, language choices, and selected track source.
Explicit failures
Separate invalid URLs, missing captions, restrictions, and upstream limits.
A useful transcript response
A production response should contain normalized video metadata, selectedLanguage, a manual-or-automatic source value, available languages, and transcript lines with start, duration, and text. Keep the response schema versioned and make future optional fields additive.
Reliability architecture
A resilient API combines request deduplication, safe caching, exponential backoff, provider fallbacks, clear timeouts, and a queue that prevents upstream bursts. Cache successful caption results because they usually change infrequently, and maintain negative caching briefly for known unavailable videos.
Errors developers can act on
Return stable error codes for INVALID_URL, NO_CAPTIONS, VIDEO_RESTRICTED, UPSTREAM_RATE_LIMIT, TIMEOUT, and EXTRACTION_FAILED. A clear error contract helps clients decide whether to correct input, retry later, or offer an audio-transcription fallback.
Before selling public access
The current product uses internal web endpoints. Public API access should launch only after API-key authentication, per-key quotas, billing, abuse controls, versioning, observability, documentation, a status page, and a published service policy are implemented.
Honest availability
No API can guarantee every public video because captions, restrictions, removals, and upstream behavior are controlled elsewhere. A credible service target should apply to supported public videos with accessible caption tracks and should report source and failure state accurately.
Frequently asked questions
What to know before downloading
Is public API access available now?
The application has internal endpoints. A public API should launch after authentication, quotas, documentation, and support policies are complete.
Can the API guarantee every video?
No. It can provide a strong service target for supported videos with accessible captions, but upstream availability remains outside its control.
Should transcript responses be cached?
Yes, where permitted. Safe caching reduces latency and upstream request pressure.
Turn the next video into text you can use.
Creator-uploaded captions preferred. Clean reading and precise exports.
Download a transcript free →