Does it preserve JSON structure?

Yes — JSON is pretty-printed with 2-space indent and rendered in a monospace font. Deep nesting indents as expected.

What if the JSON is huge?

Paginates automatically. Tens of thousands of lines produce a multi-page PDF; browser memory caps around ~100k lines.

Basic options: font size, line numbers, background color. For fully custom styling convert to HTML with syntax highlighting first.

Yes — keys, strings, numbers, booleans, and nulls each get a color. Improves readability for technical audiences.

Pretty-print JSON and export as a readable PDF. Part of the DevTools Surf developer suite. Browse more tools in the PDF collection.

Pretty-printed JSON is roughly 20–40% larger than minified JSON — most of the extra bytes are indentation.
The JSON spec does not define a maximum nesting depth — some parsers set limits at 1000 levels to prevent stack overflow attacks.
JSON Lines (NDJSON) avoids the need for pretty-printing altogether by putting one record per line.

Does it preserve JSON structure?: Yes — JSON is pretty-printed with 2-space indent and rendered in a monospace font. Deep nesting indents as expected.
What if the JSON is huge?: Paginates automatically. Tens of thousands of lines produce a multi-page PDF; browser memory caps around ~100k lines.
Can I customize the styling?: Basic options: font size, line numbers, background color. For fully custom styling convert to HTML with syntax highlighting first.
Syntax highlighting?: Yes — keys, strings, numbers, booleans, and nulls each get a color. Improves readability for technical audiences.

Pretty-print JSON and export as a readable PDF. Part of the DevTools Surf developer suite. Browse more tools in the PDF collection.

Pretty-printed JSON is roughly 20–40% larger than minified JSON — most of the extra bytes are indentation.
The JSON spec does not define a maximum nesting depth — some parsers set limits at 1000 levels to prevent stack overflow attacks.
JSON Lines (NDJSON) avoids the need for pretty-printing altogether by putting one record per line.

Does it preserve JSON structure?: Yes — JSON is pretty-printed with 2-space indent and rendered in a monospace font. Deep nesting indents as expected.
What if the JSON is huge?: Paginates automatically. Tens of thousands of lines produce a multi-page PDF; browser memory caps around ~100k lines.
Can I customize the styling?: Basic options: font size, line numbers, background color. For fully custom styling convert to HTML with syntax highlighting first.
Syntax highlighting?: Yes — keys, strings, numbers, booleans, and nulls each get a color. Improves readability for technical audiences.