Contract Comparison

Backed by Microsoft For Startups
Guided by Grayver Law Group
AES-256 Encryption

Generate accurate comparisons between contract versions in seconds.

Spot every insertion, deletion, and modification. Detect hidden changes others miss: white text on white, content obscured by drawings.

Free and no sign-up required.

Upload the two versions to compare:

Original

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PDF, DOCX or TXT

Modified

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Key Takeaways

AI-powered comparison compares any two document versions instantly

Detects insertions, deletions, and modifications at the character level

Visual comparison for PDFs catches signatures, stamps, and hidden changes

Supports PDF, DOCX, and cross-format comparison: free, no sign-up

Shareable comparison links for team collaboration

How It Works

1

Upload Both Versions

Upload the original and modified documents in PDF, DOCX, or paste text

2

AI Comparison

Our AI compares every clause, word, and formatting change between versions

3

Review Comparison

See every insertion, deletion, and modification highlighted in a precise comparison

4

Take Action

Accept or reject changes and export the final clean version

Original vs Modified

Original

This Consulting Agreement (the "Agreement") is entered into as of January 15, 2025 by and between Acme Corp ("Client") and Summit Consulting LLC ("Consultant"). Consultant shall provide strategic advisory services as described in Exhibit A. All work product shall be owned exclusively by Client. Either party may terminate this Agreement with 30 days written notice.

Modified

This Consulting Agreement (the "Agreement") is entered into as of March 1, 2025 by and between Acme Corporation ("Client") and Summit Consulting LLC ("Consultant"). Consultant shall provide market research and data analysis services as described in Exhibit A. Either party may terminate this Agreement with 14 days written notice. Upon termination, Consultant shall return all confidential materials within 5 business days.

Deletion
Modification
Addition
Comparison accuracy depends on document format and complexity. Always review the generated comparison before acting on it. See our Terms of Use for full disclaimers.

Why Compare Your Documents?

Counterparties change contracts between rounds. Some changes are obvious, others are deliberately subtle. Comparison reveals every insertion, deletion, and modification, so you negotiate from a position of full knowledge, not assumption.

Catch Unauthorized Changes

Counterparties sometimes alter payment terms, liability caps, or termination clauses without flagging them. Comparison surfaces every word-level change so nothing gets signed unnoticed.

Speed Up Negotiation Cycles

Manual side-by-side comparison can take hours per round. AI comparison delivers a complete change report in seconds, cutting days off multi-round negotiations.

Detect Hidden & Visual Changes

White text on white backgrounds, content obscured by annotations, removed signatures or stamps: Justee’s visual comparison catches modifications that text-only comparison tools miss entirely.

Work Across Formats

Contracts arrive as Word drafts, signed PDFs, and scanned copies. Justee compares across formats: compare a DOCX against a PDF without converting either.

Create an Audit Trail

Every comparison generates a shareable link documenting exactly what changed between versions: a built-in record for compliance teams, outside counsel, and internal approvals.

Replace Track Changes

Track Changes only works when enabled before edits. Justee compares any two versions, even when the counterparty disabled tracking or edited outside Word.

Justee AI provides free contract comparison that generates precise comparisons in seconds, detecting every insertion, deletion, and modification between document versions. Backed by Microsoft For Startups and guided by Grayver Law Group, Justee supports PDF, DOCX, and cross-format comparison with visual comparison capabilities that detect signatures, stamps, and hidden changes traditional text-based tools miss.

Official Legal Resources

ABA Legal Technology Resources

American Bar Association guidance on legal technology best practices.

UCC Article 2: Contract Law

Cornell Law Institute reference for the Uniform Commercial Code governing sales contracts.

NIST Document Management Standards

Federal standards for document integrity and electronic records management.

“Justee’s comparison technology is transforming how legal teams compare contract versions. What used to take hours of manual review now happens in seconds with character-level precision.”
Artem Dolukhanyan
Artem Dolukhanyan

Partner, Corporate Transactions at Grayver Law Group

Last updated: August 4, 2026

Contract Comparison FAQ

Contract comparison is the legal industry's standard method for identifying every change between two document versions. Instead of manually reading through contracts line by line, comparison software instantly highlights insertions, deletions, and modifications, showing exactly what changed, where, and how.

Upload both contract versions to Justee. Justee generates a complete comparison in seconds: additions in green, deletions in red, modifications clearly marked. No manual review required.

Justee compares Word documents (.doc, .docx), PDFs (including scanned PDFs), and plain text files. You can even compare across formats: upload a Word draft and a signed PDF to verify nothing changed after signature.

Yes. Justee fully supports PDF comparison, including PDF to PDF, Word to PDF, and scanned PDF comparison using OCR technology. This is essential for legal work where signed documents are often scanned.

Track Changes only works if enabled before edits. Justee compares any two contract versions, even without Track Changes. Critical when counterparties, external counsel, or third parties make undisclosed modifications.

Yes. Justee uses advanced Optical Character Recognition (OCR) to extract text from scanned documents and images. Compare signed contracts, legacy documents, or any paper-based materials that have been digitized.

Justee detects changes at the character level with high accuracy. Unlike basic diff tools, our AI understands document structure, identifying moved paragraphs, reformatted sections, table changes, and semantic modifications that simple tools miss.

Most comparisons generate in under 10 seconds, regardless of contract length. A 100-page agreement processes as fast as a 2-page NDA.

Every comparison generates a unique shareable link. Send it to colleagues, clients, or opposing counsel; they can view results without a Justee account. You control access and can revoke sharing at any time.

Absolutely. Justee uses enterprise-grade security: AES-256 encryption at rest, TLS 1.2+ encryption in transit, and SOC 2-compliant infrastructure. Documents are never used to train AI models and can be automatically deleted after processing.

The most common comparison use cases include: contract revisions from counterparties, NDA versions during negotiation, policy updates and amendments, lease modifications, employment agreement changes, terms of service updates, board resolution revisions, and any document where you need to verify what changed between versions.

Currently, Justee compares two contract versions at a time: the standard approach for version comparison. For multi-version tracking, run sequential comparisons to trace changes across your negotiation history.

Justee detects three main types of text changes: Deletions (text removed from the original), Insertions (new text added), and Replacements (text that was modified). For PDF documents, Justee also performs visual comparison to detect non-text changes like signatures, stamps, initials, form field modifications, image changes, and annotations, changes that text-only comparison tools miss entirely.

Visual comparison analyzes documents as images, detecting changes that text extraction cannot capture. This includes: Signatures added or removed, Stamps and initials, Form field changes (checkboxes, filled fields), Images inserted or modified, Annotations and markups, pages added or removed, and hidden content like white text on white background or text obscured by drawings. Critical for legal documents where any hidden modification could alter the contract's meaning.

Justee categorizes visual changes by severity to help you focus on what matters most: Critical changes include signatures, stamps, and initials: elements that affect document authenticity. Important changes include form field modifications, dates, and significant image changes. Minor changes include small text adjustments and formatting differences. This prioritization ensures you never miss legally significant modifications.

Yes. Justee's visual analysis detects content that other comparison tools miss: White text on white background (a common tampering technique), text hidden behind shapes or drawings, content covered by markers or annotations, and color changes designed to make text invisible. These detection capabilities protect you from fraudulent modifications that are invisible to the naked eye but could have serious legal consequences.

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