Compared entirely in your browser — text never leaves your device
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Paste text in both fields and click Compare
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Frequently asked questions
What is a diff checker?
A diff checker compares two pieces of text and highlights the differences between them. It shows what was added, removed or changed.
What can I use diff checker for?
Comparing code versions, checking document changes, finding differences between two JSON responses, comparing configuration files, or reviewing text edits.
Is my text safe?
Yes. All comparison happens entirely in your browser — your text never leaves your device.
Does it support code comparison?
Yes! Paste any code, JSON, XML or plain text and it will find the differences line by line.