Is my JSON uploaded to a server?

No. The parsing, formatting, and PDF rendering all run in your browser using pdf-lib. Useful for sharing API responses, configuration dumps, audit logs, or any structured data without exposing it to a third-party service.

What if the JSON is malformed?

The tool refuses to convert and returns a friendly error. Use a JSON validator or formatter to fix syntax errors first — the tool relies on JSON.parse and cannot guess at recovery.

Are nested arrays and objects supported?

Yes. JSON.stringify with 2-space indent handles arbitrary nesting. Very deep structures (10+ levels) become hard to read regardless of formatting; consider extracting subsections first.

What is the maximum file size?

The current limit is 5 MB of source JSON. After pretty-printing, the rendered PDF can be larger. For very large datasets (database exports, log archives), use a JSON-to-CSV tool first and convert that instead.

Is my JSON uploaded to a server?

No. The parsing, formatting, and PDF rendering all run in your browser using pdf-lib. Useful for sharing API responses, configuration dumps, audit logs, or any structured data without exposing it to a third-party service.

What if the JSON is malformed?

The tool refuses to convert and returns a friendly error. Use a JSON validator or formatter to fix syntax errors first — the tool relies on JSON.parse and cannot guess at recovery.

Are nested arrays and objects supported?

Yes. JSON.stringify with 2-space indent handles arbitrary nesting. Very deep structures (10+ levels) become hard to read regardless of formatting; consider extracting subsections first.

What is the maximum file size?

The current limit is 5 MB of source JSON. After pretty-printing, the rendered PDF can be larger. For very large datasets (database exports, log archives), use a JSON-to-CSV tool first and convert that instead.

JSON to PDF

Convert JSON files to pretty-printed PDF

Processed locally — your files never leave your browser

How It Works

Upload

Drag a .json file onto the upload area. The file is read into your browser memory only. JSON is parsed and re-serialised with 2-space indentation before rendering.

Convert

The pretty-printed JSON is rendered with a monospace Courier font so keys, values, and indentation align cleanly. Lines wrap on the page boundary; long string values that exceed line width break character-by-character.

Download

Save the PDF directly to your device. Output is a standard, searchable PDF — viewers can highlight and copy text out for reuse.

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