Private Side-by-Side Code & Contract Text Diff Viewer
Spot exact line additions, deletions, and edits between two versions of source code, legal agreements, or markdown drafts 100% locally.
Step-by-Step Client-Side Workflow
Paste Version A & Version B: Enter the original draft on the left and the revised version on the right.
Review Highlighted Changes: See exact line numbers for every insertion and removal.
Verify with Zero Cloud Footprint: Review NDA-protected contracts or proprietary source code safely.
Why Use VaultTools Zero-Upload Architecture
Safe for .env & Config Files: Compare production and staging environment files containing database passwords or API keys without leaking secrets online.
Legal & Contract Redlining: Verify whether counterparty edits altered subtle wording across NDAs, terms sheets, or policy drafts.
Zero Lag on Large Snippets: Diffs compute instantaneously as you type or paste, with clear addition and deletion counters.
Frequently Asked Questions
Can lawyers and paralegals use this to compare NDA contract clauses?
Yes. Because no text leaves your workstation browser, it is ideal for checking redlines on confidential agreements.
Why shouldn’t I paste code or config files into standard online diff checkers?
Many public diff websites store compared snippets in server databases or create public share links by default, which has historically led to leaked AWS keys, .env files, and proprietary source code.
Can I compare JSON, YAML, SQL, or plain prose?
Yes. The Offline Diff Checker works with any plain-text format including source code, configuration files, Markdown, CSVs, and legal paragraphs.