JSON Key Sorter

Put the keys of every object in order so two versions of the same document can be read side by side.

Order Indent Numbers in order Sort nested objects too

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Sorting keys is what makes two versions of a document comparable. Configuration written by hand and configuration written by a program hold the same data in a different order, and a text diff on the pair is unreadable until both sides are sorted the same way. Only object keys move here. An array is left exactly as it was, because the order of an array is part of the data, and a tool that quietly sorted arrays as well would change what a document means while claiming to tidy it. Comparison is by code unit by default, which puts capitals before lower case and 10 before 2. The option to read digit runs as numbers fixes the second of those, and is written out here rather than handed to the browser, since a comparison that follows the page language would sort the same file differently in each of this site four languages. Duplicate keys survive as duplicates, side by side.

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Paste your JSON into the input pane, or load the sample.
Choose the order and the indent width, then press Sort keys.
Copy the result or download it as a file.

Domande frequenti

Does sorting change my data?

No. A JSON object is a set of name and value pairs and the specification gives it no order, so reordering the keys of an object leaves the data identical and every parser hands your program the same result. Arrays are the opposite case and are never touched. Values keep their exact text as well, so a long integer and a number written as 1.0 come back as you wrote them.

Why is 10 before 2?

Because keys are text, and comparing text one character at a time puts 1 before 2. That is what almost every tool and every language does by default. Turn on the option to read digit runs as numbers and item2 sorts before item10, which is usually what you want when keys are numbered. The two orders are both defensible, which is why the choice is on the page.

What happens to duplicate keys?

They stay, next to each other. Duplicates are legal JSON and almost always a mistake, and the validator on this site reports them with both line numbers. Dropping one here would be this tool deciding which of the two you meant, on a page whose whole job is to leave your data alone.

JSON Key Sorter

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