Compare Any Two Documents Instantly
Contrast shows you every addition, deletion, and modification between two files — highlighted clearly in green and red. Works with PDFs, Word docs, JSON, CSV, images, SQL, and more.
Stop reading documents line by line to find what changed
When a contract is revised, an insurance policy is renewed, or a configuration file is updated — you need to know exactly what changed. Manually comparing two documents takes hours and is error-prone.
Contrast automates this entirely. Upload the original and modified version — Contrast highlights every difference in seconds, with additions in green, deletions in red, and a structured summary of all changes.
No Login Required
Start comparing immediately without an account
Instant Results
Documents are analysed in seconds, not minutes
Privacy-First
Files are not stored permanently on our servers
8+ File Formats
PDF, Word, JSON, CSV, images, SQL, and more
Three Steps to See Every Difference
Upload Two Files
Upload the original file and the modified version. Contrast accepts PDFs, Word docs, images, JSON, CSV, SQL, YAML, and more.
Contrast Processes Them
The comparison engine analyses content at character, word, and structural level — instantly, in your browser.
See Every Difference Clearly
Additions appear in green, deletions in red, and modifications are highlighted — with a summary of what changed and where.
Works with Your Files — Whatever Format They're In
Compare policy documents, reports, contracts
Word / DOCX
Compare drafts and edited versions
CSV / Excel
Compare data exports and spreadsheets
Images
Compare UI screenshots and design files
JSON
Compare API responses and config files
SQL / YAML
Compare schemas and infrastructure code
TXT / Markdown
Compare plain text and documentation
More formats
Structured and unstructured files supported
Document Comparison for Every Team
Legal & Compliance Teams
Compare contract revisions, identify changed clauses, and track amendments across policy documents — without manually reading every line.
- Contract version comparison
- Policy amendment tracking
- Regulatory document review
HR Professionals
Compare employee handbook versions, insurance policy terms between renewal years, and benefit plan documents from different insurers.
- Insurance policy comparison
- Benefits terms year-over-year
- Employee policy updates
Developers & Engineers
Compare API response payloads, database schema changes, configuration files, and YAML/JSON data between environments.
- API response diff
- Schema migration review
- Config file comparison
Analysts & Finance Teams
Compare CSV exports from different systems, data snapshots, financial report versions, and structured datasets.
- Data export comparison
- Report version tracking
- Spreadsheet diff
Contrast FAQs
What file types does Contrast support?
Contrast supports a wide range of file types including PDF, DOCX (Word), plain text, JSON, CSV, SQL, YAML, Markdown, and images (PNG, JPG, WEBP). More formats are being added regularly.
Is my data stored on your servers?
No. Contrast is designed with privacy first — your files are processed for comparison and not stored permanently on our servers. We do not retain the content of files you upload.
Do I need to create an account?
No. Contrast is completely free to use without any account or login. Just upload your files and compare.
What's the maximum file size I can compare?
Contrast handles most standard document sizes efficiently. Large files are processed using efficient algorithms to keep comparison fast, even for lengthy contracts or large data exports.
Can I compare files in different formats?
Contrast is primarily designed to compare two files of the same type for the most accurate results. For example, comparing two PDFs or two JSON files gives the most precise diff. Cross-format comparison is supported for text-based formats.
How is this different from a simple text diff tool?
Contrast understands document structure — it doesn't just compare raw text character by character. For PDFs and DOCX files, it extracts and compares semantic content. For JSON and YAML, it understands key-value structure. For images, it does visual pixel comparison.
Ready to compare your documents?
Upload any two files and see every difference in seconds — no account, no complexity, no cost.