Render a Marked JSON token AST back to clean Markdown. Round-trip safe.
Free JSON AST to Markdown Renderer takes a JSON token array (as produced by marked's lexer or our Markdown to JSON tool) and renders it back to clean GitHub-Flavored Markdown. Round-trip safe for standard documents — headings, paragraphs, lists, code blocks, tables, blockquotes, inline formatting, and links all come through intact.
Privacy: This tool runs entirely in your browser. Your text is never uploaded, logged, or cached. Close the tab and it's gone. Verify in DevTools → Network: zero requests fire.
If you're writing a Markdown pipeline — a CMS, a static site, a content migration script — you need a way to go both directions. The forward tool is free, this reverse tool is free, both run 100% in your browser.
| Input | Output | Typical size | Speed | Login needed |
|---|---|---|---|---|
| JSON token array | Markdown (.md) | Any document | < 30 ms | No |
Here's what this free tool does in detail — every feature is built to solve real problems, runs entirely in your browser, and is free forever.
Every standard GFM token type is supported: heading, paragraph, code, blockquote, list, list_item, table, hr, space, text, em, strong, del, link, image, codespan, br, and html. If marked can parse it, this renderer can render it back.
For the opposite direction, use the Free Markdown to JSON (AST) tool.
The renderer is designed to produce Markdown that, when reparsed, yields an equivalent token tree. For standard documents, the output is byte-compatible or very close. This matters when you're building a CMS, a migration script, or a round-tripping formatter.
To verify round-trip fidelity, convert your output with the Free Markdown to JSON tool and compare ASTs.
List items can contain paragraphs, nested lists, code blocks, and blockquotes — the renderer walks the nested token trees correctly and indents continuation lines to align under the marker. Tables render with per-column alignment (:---, :---:, ---:) preserved from the token's align array.
Invalid JSON, non-array input, or broken token shapes all produce an inline error message directly under the editor — not a silent empty output. Fix the JSON and the output updates instantly. For pretty-printing or reformatting messy JSON first, use a JSON formatter alongside this tool.
Once you have clean Markdown, render it to HTML with the Free Markdown to HTML tool.
Get a token array from marked's lexer, from a Markdown pipeline, or from the Markdown to JSON tool.
The tool parses and renders live — no 'run' button.
Download or copy the rendered Markdown into your destination file.
Store posts as JSON ASTs and render to Markdown for export or backup.
Move content through a JSON intermediate form without losing fidelity.
Test round-trip behavior of marked or remark by piping through both tools.
Convert between proprietary JSON formats and Markdown en masse.
Render stored AST backups into readable Markdown when needed.
Yes. Free forever, no account required.
An array of token objects as produced by marked's lexer (or the Markdown to JSON (AST) tool on this site).
All standard GFM tokens — heading, paragraph, list, code, table, blockquote, link, image, and inline formatting.
Yes. Markdown → JSON → Markdown produces an equivalent document for standard GFM content.
No. Runs 100% in your browser.