Most chart plugins still lean on JavaScript output that is hard to interpret outside the browser. PressViz keeps the chart backed by a semantic HTML table, a schema.org/Dataset with your actual rows, a freshness timestamp, and source attribution.
<!-- chart container --> <div class="chart-wrap"> <canvas id="myChart"></canvas> <!-- JS renders here --> <!-- crawler gets: nothing --> </div>
<table> <caption>Q1 Revenue by Region</caption> <tr><th>Region</th><th>Revenue</th></tr> <tr><td>North</td><td>4,200</td></tr> <tr><td>South</td><td>3,100</td></tr> </table> <script type="application/ld+json"> { "@type": "Dataset", "dateModified": "2026-04-29", ... } </script>
Visualizer, Ninja Charts, and wpDataTables all rely heavily on JavaScript output for charts. PressViz adds semantic HTML and structured data so the underlying facts are easier to crawl and reuse.
| Category | Revenue |
|---|---|
| Q1 | $4.2M |
| Q2 | $3.1M |
Every PressViz chart can expose the same data in three ways: the visual chart, semantic HTML, and structured metadata.
A screen-reader-friendly <table> with every data row, a <caption>, column headers with scope="col", and row headers with scope="row". The data stays in the DOM.
Structured data injected inline on every chart. Includes the full dataset as a markdown table in the text field, a dateModified timestamp from the database, optional sameAs source URL, and your site as creator.
Native hooks into Yoast SEO, RankMath, AIOSEO, SEOPress, and The SEO Framework. The beta includes these integrations, so the chart metadata can sit alongside the rest of your schema output.
5 PLUGINS SUPPORTEDWikipedia gets cited by AI constantly because the content is available as real HTML. PressViz follows the same principle: the chart is the visual layer, and the table is the source layer. Both ship together.
The dateModified field in every chart's JSON-LD comes from the database timestamp, so it updates when the data changes. That gives crawlers a clearer freshness signal without manual date fields.
Journalism, research, and data-driven content needs citable sources. Every PressViz chart has a "Data source URL" field. When set, it outputs as sameAs and url in the JSON-LD so the source can travel with the chart.
Accessibility and SEO overlap here: if the chart meaning is trapped in the visual render alone, it is harder for both humans and machines to use. PressViz keeps the data available in more than one format.
Every chart figure carries role="img", an aria-label with the chart title, and an aria-describedby pointing to a plain-English description. Screen readers announce the chart before the user reaches the data table.
The same HTML table that crawlers read is also available to screen readers. With <caption>, scope="col" on headers, and scope="row" on category cells, it stays navigable and structured in any reading mode.
Chart canvas elements are aria-hidden so screen readers skip the visual layer and go straight to the data. No color-only encoding without labels. The visual chart is decoration. The content is the table.
Audited April 2026 against plugin source code, GitHub repositories, and WP.org listings. Re-verify before acting on any row — plugins ship updates.
dateModified freshness signalsameAs)aria-label + screen-reader accessible⚠ Audit note: This table was verified in April 2026. Plugin features change — re-verify against the latest release before publishing or citing this data. Competitor notes: Visualizer uses Google Charts / Chart.js / D3.js (JS-dependent, SVG/canvas). It does output schema.org/Dataset but only license and creator properties — not the data rows. wpDataTables primary product is HTML tables (crawlable) but charts are Chart.js canvas with no JSON-LD. Hosted embeds and page-builder chart widgets vary by source, so re-check the specific embed or builder module before citing.
Every chart you publish with PressViz carries semantic output and structured metadata. No extra plugins. No configuration. No SaaS subscription.