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Transform ugly or minified JSON into a beautifully formatted, readable output with proper indentation and line breaks. Beautify JSON instantly in your browser.
JSON beautification is the process of taking raw, compact, or poorly formatted JSON and transforming it into a clean, consistently indented, human-readable document. The terms "JSON beautifier", "JSON formatter", and "JSON pretty printer" all refer to the same operation. The result is JSON that is easy to read in a code review, comfortable to include in documentation, and simple to debug.
JSON Viewer Pro's online JSON beautifier gives you full control over the output format. Choose between 2-space indentation (the most common convention), 4-space indentation (preferred in many enterprise codebases), or tab indentation. You can also sort all object keys alphabetically, which is useful for producing stable, diff-friendly JSON output, and optionally strip null values or empty strings from the result.
Beautifying JSON is entirely free and requires no account or login. The beautifier processes your JSON locally in your browser using the Monaco editor engine, the same technology that powers Visual Studio Code. Syntax errors are highlighted in real time so you know immediately if your input is invalid before attempting to beautify it. Output can be copied to clipboard or downloaded as a .json file in one click.
They are the same thing. Both terms refer to adding indentation and line breaks to raw JSON to make it human-readable.
Yes. You can choose between 2 spaces, 4 spaces, or tabs.
Yes. JSON Viewer Pro is a PWA and works fully offline after the first load.
JSON Viewer Pro — all processing runs locally in your browser. Your data is never sent to any server. Free to use, no account required.Privacy Policy·Contact