Same data, different key order?

Key order may differ in output and show as changes.

Both sides must parse as valid JSON.

Use the text diff checker for non-JSON plain text.

Use the JSON validator if parse errors appear.

JSON Diff Online – Compare Two JSON Documents

Paste two JSON blobs to see line-aligned differences. Useful for config reviews and API response checks.

JSON A

JSON B

Diff

Enter JSON in both fields.

Each side is parsed and pretty-printed, then compared line by line.

Lines prefixed with - and + show removals and additions; matching lines are prefixed with spaces.

This is a line diff on formatted JSON, not a semantic tree diff—reordered keys may show many changes.

Both inputs stay in your browser.

Same data, different key order?: Key order may differ in output and show as changes.
Invalid JSON?: Both sides must parse as valid JSON.
Text diff instead?: Use the text diff checker for non-JSON plain text.
Validate first?: Use the JSON validator if parse errors appear.