Static HTML Duplicate-ID Review JSON

Review every repeated nonempty ID in static HTML with its complete parsed element ordinals and full inventory context.

Processing stays in your browser; code and assets download as needed. Original and checkpoint downloads retain source content, including omitted values. Reset and Exit stop this session’s owned work; they do not establish secure erasure or anonymity. Markup is parsed as data; source pages are not opened and their scripts are not executed.

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About this flow

Paste static markup or select a UTF-8 TXT copy. Choose document or neutral-template fragment parsing, download the complete duplicate-ID JSON array, and keep the full inventory checkpoint and original for context. A no-collision result is the valid array [].

Limitations

One UTF-8 TXT input or pasted source at most 200,000 UTF-16 units and 800,000 bytes. The unchanged parser's node/depth/attribute/occurrence/output/time bounds apply.
The complete inventory must also fit downstream 5 MiB, 200,000-value and 40-level JSON limits; otherwise no final is produced and the genuine checkpoint remains.
IDs are exact parsed strings. Empty IDs are excluded, whitespace-only IDs are not empty, duplicate raw attributes normalize and inert template descendants are included.
The full inventory supplies context; a duplicate involving inert template contents is not certified as an active-page collision.
No live DOM scan, CSS/script evaluation, HTML validity/accessibility/security certification, automatic repair, redaction or measured-demand claim.