GratisAI accessibility · map a human-approved reading sequence against observed dom order · local-first FREE TIER 1 Free Run Available
sequence-permutation matrix · scored comparison matrix

Map a Human-Approved Reading Sequence Against Observed DOM Order

A page’s content can be visually rearranged while its underlying sequence stays elsewhere. Enter a human-approved order and observed DOM ranks to locate displaced blocks without confusing order comparison with a full accessibility audit.

1 · content block | expected sequence rank | observed DOM rank

FIRST-LOAD

HYPOTHESIS / PROTOTYPE — checkout unavailable. Calculation is local. A draft is saved automatically in this browser profile when storage is available; Reset to sample clears it. Optional Pro history stores only five summaries and has its own deletion control. State links encode your inputs and can remain in browser history, clipboard or recipients’ records; share only non-sensitive rows. Optional external AI formatting leaves this device. The required site analytics beacon reports page activity; shared URLs contain encoded inputs. Do not treat an encoded URL as private. The calculator has no input-collection endpoint.

Data note: The sequence-permutation matrix processes content block | expected sequence rank | observed DOM rank locally. Starter/sample selection and Run compute in this tab; no input is sent by the calculator. A local draft may be saved; explicit state-link sharing or optional external AI formatting can disclose inputs. Use non-sensitive labels.

Perspective: Before: a visual layout could hide a different underlying sequence. After: two complete rank permutations expose earlier and later blocks without declaring the correct logic.

2 · Read the sequence-permutation matrix

Sequence-comparison arithmetic only, not an accessibility certificate, automated DOM audit or determination of the correct reading order. It compares human-supplied ranks and does not test assistive technology, focus order or comprehension. Review the actual page with users and a qualified accessibility specialist before making consequential layout or semantic changes.

Optional filing controls are a local prototype.

Checkout is unavailable. The reading above is complete; print, CSV and five local summaries are optional enhancements, not hidden answers.

Before using the sequence-permutation matrix

First determine which blocks carry meaning and what order makes the document understandable. A multi-column layout may require a different logical sequence from a simple left-to-right scan, so the expected rank needs human review. Then observe the actual DOM sequence with browser tools or an approved assistive-technology workflow and number the same blocks. This instrument keeps those two observations side by side. It does not fetch a webpage, parse uploaded HTML or infer reading order from pixels. Labels should describe blocks, not include private page content. A complete permutation forces the same set of blocks to appear exactly once in each order; if one is missing, fix the inventory before comparing positions. The result gives a reviewer a concrete place to inspect, not an automatic remediation command.

Boundary and sources

Sequence-comparison arithmetic only, not an accessibility certificate, automated DOM audit or determination of the correct reading order. It compares human-supplied ranks and does not test assistive technology, focus order or comprehension. Review the actual page with users and a qualified accessibility specialist before making consequential layout or semantic changes.

Mechanism: competence-autonomy-loop

Optional AI formatting, never the calculation

Manual entry completes this sequence-permutation matrix for free without signup. If available to you, the free AI Studio interface linked in the sources may format fictional or non-sensitive notes; external access may require an account. No API key or AI call is built into this tool. Free-tier content may be used to improve products. Review each cell and transcribe it to the labeled row schema; do not paste the JSON object into the row box.

Format only these fictional or non-sensitive notes for a sequence-permutation matrix. Return strict JSON shaped as {"rows": [{"label": "string", "cells": ["string", "string"]}], "setting": "string"}. The columns are content block | expected sequence rank | observed DOM rank; the setting is Largest displacement allowed before a review mark. Keep all supplied strings and quantities exactly; do not calculate, infer missing entries, invent dates or add advice. If any required value is missing, return an empty rows array and ask me for it separately. I will verify every cell against my source and manually transcribe rows using vertical bars before running the local calculator.

An AI response is not executed, fetched or trusted as a result. Missing values remain questions; the strict local parser checks the rows you actually enter.