How to Use This Tool
Normalize chapter timestamps while preserving row-level sequence errors. Format timestamp-and-title rows into a clean video chapter list, checking the zero start, ascending order, duplicate times and missing titles.
The work this page finishes
One nonascending or malformed timestamp can invalidate an otherwise complete chapter draft, and the error is difficult to spot in a long description. A visible row-by-row result preserves provenance, making a single correction possible without rerunning unrelated records or uploading the batch.
Deterministic workflow
Parse mm:ss or hh:mm:ss, require the first valid row to start at zero, require strictly increasing times and preserve titles after the separator. Input guards stop after 5,000 records or 2 MB, and the report separates fatal input problems from recoverable row warnings.
Why a dedicated interface helps
Paste only after every row is valid; the output deliberately retains error rows until they are corrected. Deterministic ordering, one-click copying and a downloadable artifact make repeated operational review easier than manually reconstructing a response from prose.
Assumptions
- One chapter appears per line.
- A vertical bar separates time from title.
- The first chapter begins at 0:00.
Do not discard the source after export: compare the destination result with it, and remember that local execution cannot secure the surrounding device or browser add-ons.
Limitations and review boundary
It does not inspect video duration, enforce a platform-specific minimum chapter length or fetch a video description. User values are never run as script, rendered as markup or fetched as network destinations; the page writes them only into text nodes.
Verification and provenance
On 2026-08-26, the rule and examples were cross-checked with YouTube Embedded Players and Player Parameters, including a known result, a rejected input and a conflict or duplicate case. The fixture produces three normalized ascending chapters beginning at 0:00.
Sources & assumptions
Tool Spec v2 · verified 2026-08-26. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- YouTube Embedded Players and Player Parameters (checked 2026-08-26)
Model assumptions
- One chapter appears per line.
- A vertical bar separates time from title.
- The first chapter begins at 0:00.
- It does not inspect video duration, enforce a platform-specific minimum chapter length or fetch a video description.
