How to compare two JSON files online
Find exactly which keys and values changed between two JSON documents, even when the formatting or key order is different.
2 min read
Compare JSON
untitled.json
Paste content in both editors
Original1 line
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Modified1 line
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NOTHING UPLOADED · RUNS LOCALLY · FREE TO USE
About JSON comparison
Compare JSON with confidence.
JSON often arrives minified or with keys in a different order, which makes a plain line comparison noisy. Format both sides, optionally sort the keys, and the real changes stand out.
01
Format first
Minified JSON is one long line. Use Format to pretty-print both sides so each value gets its own line.
02
Sort keys to ignore order
Two objects with the same keys in a different order are equal in JSON. Sort keys removes that false noise.
03
Check validity
If a side is not valid JSON you will see a warning, so a missing comma never hides a real change.
Features
Quiet tools, sharp results.
01
Aligned side by side
Two editors scroll together so the line you are reading always faces its counterpart.
02
Every change, coloured
Ember marks edits and removals. Ink marks additions. No other colours to learn.
03
Jump between differences
Step forward and back through each change with a count of how many remain.
04
Ignore the noise
Switch off whitespace and letter-case differences to focus on what really matters.
05
Changes, explained
A line-by-line list says what happened to each line, such as “Friday” became “Monday” or a number went from 3 to 4. Click any entry to jump straight to it.
How it works
Three steps. No account.
i
Paste
Drop the original on the left and the new version on the right.
ii
Compare
Differences are highlighted as you type, line by line.
iii
Decide
Review the summary, swap sides or clear the editors and go again.