Online Diff Checker

Paste left and right versions, switch text or JSON mode, and see line-by-line additions and removals. Runs in your browser — private and free.

Diff result

Added: 0·Removed: 0·Unchanged: 0

OriginalModified

Paste text on both sides to see the diff.

Online diff checker — compare text, JSON, and code

An online diff checker highlights what changed between two versions of text, JSON, API responses, or code. Paste the original on the left and the updated version on the right, then read a line-by-line view with additions in green and removals in red.

Mini Tooly Diff Checker runs entirely in your browser. Nothing is uploaded to a server. Use text mode for logs, configs, or prose; use JSON mode to format both sides before comparing so only real data changes stand out.

Format JSON with JSON Formatter (/tools/json-formatter). Encode strings with Base64 Converter (/tools/base64-converter). Browse all tools on the hub (/tools).

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