Redlines
Document Comparison Tool Built for Legal Workflows
Faster contract review and version control for legal teams that can’t afford enterprise document management systems. Shows changes in the familiar strike-through/underline format lawyers recognize from Microsoft Word.
Business Value for Legal Teams Link to heading
Time Savings: Instantly spot changes between contract versions
Cost Effective: Open-source alternative to expensive comparison tools
Familiar Interface: Strike-through/underline format lawyers already know
Multiple Formats: Export comparisons as Markdown, HTML, or terminal display
No Vendor Lock-in: Own your tool, customize as needed
Perfect For: Link to heading
- Solo counsels reviewing contract revisions without enterprise tools
- Small legal teams needing efficient document version control
- Corporate counsel working with multiple contract iterations
- Legal professionals who want tool independence from vendors
Technical Implementation Link to heading
Redlines uses Python’s SequenceMatcher to find differences between documents at the word level. The output format mimics Microsoft Word’s track changes but works with any text format - perfect for contract review workflows where you need to quickly identify what changed between versions.
Why This Matters: Many legal teams pay thousands for document comparison features in enterprise software. Redlines gives you the core functionality you actually use, without the enterprise overhead.
I gave a talk on it too!
Check out the presentation here too: