Text Diff

When to use Text Diff

A founder just got a revised contract back from legal and needs to know what actually changed from the draft they sent. Paste the original in the left panel, the new version in the right, and the Myers diff algorithm highlights every addition in green and every deletion in red — line by line, in seconds. The comparison runs locally in your browser tab, so sensitive contract language stays on your machine. Switch between side-by-side and inline view depending on how much screen you have. Walk away with a clear picture of exactly what moved: a changed payment clause, a removed liability cap, an added termination condition. Works on any plain text — SQL migrations, essay drafts, configuration files, cover letters sent to different companies.

• Spot changed clauses between two versions of a contract
• Review what a copywriter revised in a landing page draft
• Compare two config files before deploying a server change

About this tool

Paste two blocks of text and see exactly what changed — additions in green, deletions in red, unchanged lines in grey. Switch between side-by-side and inline view depending on how you're reading the diff. Useful for comparing two versions of a document you edited separately, spotting the difference between what a client sent and what you replied with, or reviewing a configuration change before deploying it. Works on any plain text: contract redlines, essay drafts, config files, SQL queries. Your text stays on your device — nothing uploads. Diffing runs entirely in the browser using a standard LCS algorithm.