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Format JSON with the exact indentation style you need — 2 spaces, 4 spaces, or tabs. Change the indent size of any JSON document instantly in your browser.
JSON indentation refers to the whitespace used to visually separate levels of nesting in a formatted JSON document. The most common indentation styles are 2 spaces (used by most JavaScript and Node.js projects, and the default in JSON.stringify), 4 spaces (common in Java, Python, and enterprise codebases), and tabs (used in some Go and C++ projects). Choosing the right indentation style matters for code consistency, diff readability, and integration with existing tools.
JSON Viewer Pro's indentation control tool lets you take any JSON document — regardless of its current indentation — and reformat it with exactly the indentation style you need. Paste JSON indented with 4 spaces and convert it to 2 spaces. Take tab-indented JSON and produce a 4-space version. Convert any format to any other format in one click. The reformatted output is immediately available to copy or download.
Indentation conversion is particularly useful when integrating JSON from multiple sources that use different conventions, when enforcing a consistent style across a codebase, or when preparing JSON for a tool or API that expects a specific format. All reformatting runs locally in your browser — your JSON data never leaves your device, and the tool works fully offline after the first load.
2 spaces, 4 spaces, and tabs are all supported. These cover the vast majority of JSON style conventions.
No. Indentation is whitespace only — it has no effect on the JSON data or structure.
2 spaces is the most widely used convention, especially in JavaScript and Node.js projects. JSON.stringify defaults to 2-space indentation when an indent argument is provided.
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