Three kinds of change
Comparing {"name":"Ana","age":30,"tags":["a","b"]} with {"name":"Ana","age":31,"tags":["a"],"city":"Paris"} finds 3 differences: age changed from 30 to 31, tags[1] ("b") was removed, and city was added.
JSON Diff
Compare two JSON documents and list every added, removed and changed value by path.
3 differences
Differences
| Path | Change | Before | After |
|---|---|---|---|
age | changed | 30 | 31 |
tags[1] | removed | "b" | — |
city | added | — | "Kandy" |
Runs in your browser — nothing you enter is sent to a server.
How the JSON Diff works
Paste the original JSON on the left and the changed JSON on the right. Both are parsed and compared value by value, so formatting, indentation and key order don't count as changes — only the data does.
Every difference is listed with its path, such as user.address.city or tags[1], and marked as added, removed or changed with the old and new values. Arrays are compared position by position.
Examples
Same data, different layout
{"a":1,"b":2} and a pretty-printed {"b": 2, "a": 1} are identical: key order and whitespace aren't differences.
Frequently asked questions
Why not use a text diff?
A text diff flags every reformatted line and reordered key. A JSON diff compares the data itself, so only real changes show. For prose or code, use the Text Difference Checker instead.
Is 1 the same as 1.0 or "1"?
1 and 1.0 are the same number in JSON. The string "1" is a different type, so it counts as a change.
How are arrays compared?
By position: item 0 with item 0, and so on. Inserting an item at the start of an array therefore shows every later item as changed.
Is my data uploaded?
No. Both documents are compared in your browser.
Related tools
JSON Formatter
Format, validate and minify JSON, with the exact line and column of any error.
Developer Tools
Text Difference Checker
Compare two texts and highlight what was added, removed or changed, line by line or word by word.
Text Tools
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample, with nested types, optional keys and unions.
Developer Tools