PDF & Word Document Difference Checker
Compare PDF and Word (.docx, .doc) documents by extracted text — ideal for contracts, reports, and essays.
Drop PDF or Word doc
Click to browse or drag & drop
Drop PDF or Word doc
Click to browse or drag & drop
⚠ Scanned PDFs (image-based) cannot be compared — only digitally created PDFs with a text layer are supported.
The PDF & Word Document Difference Checker extracts the text content from two documents and shows you every line that was added, removed, or changed — all in your browser. It is ideal for comparing contract revisions, academic drafts, legal documents, or any situation where you need to track changes between two versions of a file without access to version-control tools. Both side-by-side and inline diff views are available.
Upload original
Drop or click to upload your original PDF or Word document into the left panel. Supports PDF, DOCX, DOC, and TXT — up to 10 MB per file.
Upload modified
Upload the revised version of the document into the right panel.
Compare documents
Click "Compare Documents" to see every text change highlighted line by line in side-by-side or inline view.
- Scanned PDFs (images of text) cannot be diffed — use digitally created PDFs for best results.
- For Word documents, save in .docx format rather than .doc for the most reliable text extraction.
- Very long documents may take a few seconds to extract — keep files under 10 MB where possible.
Legal contract redlining and version comparison
Lawyers and paralegals regularly need to compare two versions of a contract to track which clauses were added, removed, or modified between drafts. Upload the original and revised PDF or DOCX and the tool produces a line-by-line diff of the extracted text, making it clear exactly where the parties made changes — without needing Microsoft Word's Track Changes feature or access to both parties' systems.
Academic paper and thesis revision tracking
When submitting a revised manuscript to a journal or supervisor, it is common to need a clear record of every edit made since the previous draft. Upload two versions of your DOCX or PDF to see every sentence that was added, reworded, or removed. This is faster and more precise than reading both versions side by side, and you can switch to inline view to see all changes in a single scrollable column.
Policy and compliance document auditing
When an organisation updates its internal policies, HR manuals, or compliance documents, teams need to verify that only the agreed changes were made and nothing else shifted. Uploading the old and new PDF or Word document gives a clear audit trail of the textual changes — useful for sign-off workflows and regulatory review.
Proofreading and editorial review
Editors and proofreaders working with multiple draft versions can upload two DOCX or TXT files to see exactly which sentences changed between rounds of revision. This is particularly useful when a client returns a document with unmarked changes or when reconciling edits from multiple reviewers into a single master copy.
Comparing reports and exported documents
Automated reporting systems sometimes produce slightly different outputs between runs due to data updates, formatting changes, or template edits. Uploading two PDF or TXT exports lets you confirm whether the content changed or only the formatting did — a common need when validating that a nightly report job produced the expected output.
Frequently Asked Questions
Want to learn more?
Read our guide: How to Compare Two PDF Files Online