Paste or upload two versions of a contract and see a word-level redline: deletions struck through in red, insertions in green. It runs entirely in your browser, so nothing is uploaded and the text is safe for confidential documents.
Nothing is uploaded. The comparison runs entirely in your browser. Your documents never leave your device and are not sent to any server, which matters when the text is a confidential contract.
Paste or upload both versions to see the redline.
Comparing two contract drafts? Have Pact explain what changed.
A redline shows you which words moved. Pact reads the agreement on your iPhone and explains what a changed clause actually means for you, in plain language.
Review my contract in PactA redline shows what changed, not what it means. This tool marks the words that differ between two versions. It does not judge whether a change is in your favor. For a contract that matters, have the changed terms reviewed by a lawyer before you sign.
Paste the earlier version of your document into the left pane and the newer version into the right pane, or upload a .txt file into each. The tool then compares the two word by word and produces a redline. Words that appear only in the original are marked as deletions in red with a strikethrough. Words that appear only in the revised version are marked as insertions in green. This matches the redline convention lawyers use when they mark up a draft.
Two views are available. The inline redline shows deletions and insertions together in one flow of text, which is the fastest way to read a small change. The side-by-side view puts the original and the revised text in two columns, which is easier when the edits are heavy. A summary line reports how many words were added, removed, and changed, plus a similarity percentage so you can see at a glance how far the two versions have drifted apart.
Many free comparison tools upload both documents to a server to run the comparison. For a confidential contract, an offer letter, or a document under an NDA, that upload is the problem, not the comparison. This tool runs the diff in your browser with JavaScript, so neither version leaves your device. You can verify it: disconnect from the internet, and the comparison still works. For legal and contract text, that difference is the point.
If you are new to the workflow, our guide on how to compare legal documents walks through what to look for when two drafts differ, and our overview of legal document comparison software explains where a dedicated tool fits alongside a word processor.
A redline is a map of which words moved. It cannot tell you whether a change helps you or hurts you. A single edit that changes a liability cap from $50,000 to $10,000 shows up as two swapped numbers, and the redline treats it the same as a typo fix. Reading the change is the first step; understanding what it means for your risk is a separate one.
When the differences are significant, have the changed terms reviewed. A contracts or employment lawyer is the thorough option. If you want a fast first read of what a changed clause means, Pact reads a contract on your iPhone and explains the clauses in plain language, which pairs well with a redline that has already shown you where to look. If you are choosing between dedicated tools, see our comparison of document comparison software.
This site provides general legal information, not legal advice. Consult a qualified attorney for your specific situation.