校验页面或片段里的 JSON-LD 结构化数据，并预览每种 @type 可获得的 Google 富媒体结果。
Everything runs locally in your browser — nothing is uploaded, safe for sensitive data.
Input accepts plain text, CSV/TSV tables, JSON, XML, YAML or source code depending on the tool.
Options appear above the boxes: mode buttons, dropdowns, checkboxes and parameter fields.
Results update as you type; use Copy to put them on the clipboard.
Tip: combine with other HeronTool converters to chain formats (e.g. CSV → JSON → SQL).
