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JSON to Markdown

JSON to tables and nested lists, with line and column error reporting.

How to use it

  1. Paste JSON. An API response, a config file or an export from any tool.
  2. Fix any errors. If it is not valid JSON, you get the line, the column and what went wrong.
  3. Copy the Markdown. Tables for lists of records, nested bullet lists for everything else.

Make JSON readable for people

JSON is built for machines. When you need to show an API response in a README, paste data into a doc for a teammate, or give structured data to an AI assistant in a form it reads well, Markdown is easier on everyone.

How the conversion works

  • Arrays of objects become a table. Columns are the union of every object's keys, in the order they first appear, so records with missing fields still line up.
  • Nested objects become nested bullet lists with the key in bold.
  • Short arrays of plain values are joined inline: tags: a, b, c.
  • Top-level keys that hold objects or arrays become headings, so a large document gets a navigable outline. Turn this off for one continuous list.
  • Cells that hold nested data show it as compact inline JSON rather than losing it.

Validating JSON

The converter checks the input with its own scanner before parsing, so the error position is the same in every browser. Common problems it names:

  1. Trailing commas after the last item, allowed in JavaScript but not in JSON.
  2. Single quotes around strings or keys. JSON needs double quotes.
  3. Unquoted keys like {name: "x"}.
  4. Raw line breaks or tabs inside strings. They must be written as \n and \t.
  5. Leading zeros in numbers such as 007.

Related converters

For spreadsheet data use CSV to Markdown. For structured data in your pages, the schema markup generator writes JSON-LD that search engines read.

What you get

  • Arrays of objects become Markdown tables
  • Nested objects become nested lists
  • JSON validation with line, column and a plain reason
  • Top-level keys as headings, optional
  • Runs in your browser; data is never uploaded

Questions

How do I convert a JSON array to a Markdown table?

Paste the array. If every item is an object, the keys become column headers and each object becomes a row. Missing keys leave the cell empty.

Why is my JSON invalid?

The usual causes are a trailing comma after the last item, single quotes instead of double quotes, unquoted property names, or a raw line break inside a string. The error message points to the exact line and column.

Is there a size limit?

No fixed limit. Conversion happens in your browser, so a few megabytes is fine on most devices; very large files may be slow on a phone.

Is my JSON sent to a server?

No. Parsing and conversion run locally in JavaScript, so it is safe to paste API responses that contain private data.