Paste two versions of a text and see exactly what changed, line by line, with additions and removals clearly marked and a summary of the total differences found.
Getting started
Paste the original text into the left panel.
Paste the revised version into the right panel.
The comparison updates automatically, marking added, removed and unchanged lines.
Read the summary to see how many lines changed in total.
Why it helps
Finds changes that are effectively invisible when reading two documents side by side.
Line-level comparison is fast enough for very long documents.
Clear colour coding distinguishes additions from removals at a glance.
Runs locally, so contracts, legal drafts and confidential documents stay private.
In practice
Checking exactly what a collaborator changed in a returned draft.
Comparing two versions of a contract or policy before signing.
Diffing configuration files to find the setting that broke a deployment.
Verifying that a find-and-replace did what you intended and nothing more.
Everything people ask most about the text diff checker, answered plainly.
Keep exploring
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