What happens to nested objects?

They are expanded into dot-notation columns such as address.city, so each value becomes a column and the header stays predictable.

What happens to array values?

They are not split into columns; they stay as a JSON string in a single cell (for example: ["admin","editor"]). Splitting them would make the column count depend on the data.

JSON Formatter YAML to JSON JSON to YAML CSV to JSON JSON to CSV JSON to Markdown CSV to Markdown Markdown to CSV Markdown to HTML HTML to Markdown PDF → Markdown Qiita / Zenn check

JSON to Markdown Table Converter

Convert JSON arrays into GitHub Flavored Markdown tables directly in the browser. Ideal for READMEs, issues, and docs.

Private browser-side processing

Input JSONJSON

1 2 3 4

Accepts an array of objects or a single object. Nested objects expand into dot-notation columns (e.g. address.city), and pipe characters inside cells are escaped automatically.

4 lines · 203 bytes

Output MarkdownMarkdown

No action has been run yet.

0 lines · 0 bytes

Auto-run

Same converter on the CLI

An open-source CLI version (MIT-licensed) is also available. Use the same conversion logic inside CI/CD pipelines or on machines where opening a browser isn't an option.

npm install -g formatarcGitHub·npm

About the JSON to Markdown table converter

When to use

Useful when you need to turn a JSON array from an API response into a Markdown table for a GitHub README, an issue, or a doc.

Output format

Nested objects expand into dot-notation columns such as address.city. Array values stay as a JSON string in a single cell, and pipe characters inside cells are escaped automatically.

Related converters

JSON Formatter

Free JSON pretty printer with readable syntax error messages.

YAML to JSON

Convert YAML into JSON in the browser. Useful for config files, automation definitions, and quick data inspection.

JSON to YAML

Convert JSON to YAML in your browser. 100% client-side, no upload, no signup. Preserves key order, surfaces row-level parse errors. Supports OpenAPI and Kubernetes config formats.

CSV to JSON

Convert CSV text into a JSON array in the browser. The first row is treated as the header for a predictable output structure.

JSON to CSV

Convert a JSON array or object into CSV in the browser. Nested objects are flattened into dot-notation columns (address.city) so API responses paste cleanly into a spreadsheet.

CSV to Markdown

Convert CSV into a GitHub Flavored Markdown table directly in the browser. Ideal for READMEs, issues, and docs.

Markdown to CSV

Free tool to convert a Markdown table into CSV. Pipe characters escaped in cells, with a backslash or as a numeric character reference, are restored to a literal pipe, and alignment syntax is not emitted as a data row.

Markdown to HTML

Convert Markdown into HTML in the browser. Supports GitHub Flavored Markdown including tables and task lists.

HTML to Markdown

Convert HTML into clean Markdown in the browser. Useful for migrating content from CMSes, web pages, or HTML emails.

FAQ

What happens to nested objects?
They are expanded into dot-notation columns such as address.city, so each value becomes a column and the header stays predictable.
What happens to array values?
They are not split into columns; they stay as a JSON string in a single cell (for example: ["admin","editor"]). Splitting them would make the column count depend on the data.