PDF Text Diff

The PDF Text Diff tool extracts the text layer from two PDF documents using PDF.js and performs a detailed word-level or line-level diff comparison, highlighting every addition, deletion, and modification between the versions. Tracking changes between PDF revisions is a common requirement in contract management, regulatory submissions, technical documentation, and academic publishing — where PDFs are exchanged without embedded change tracking. The tool offers side-by-side and unified diff views with navigation controls, exporting results as HTML reports or plain text diffs, all within your browser.

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How to Use

Upload the original PDF into the left panel and the modified version into the right panel. Select word-level or line-level comparison mode, toggle whitespace and case normalization options, then click Compare. Navigate changes using the prev/next controls and review additions (green), deletions (red), and unchanged text. Export the comparison as an HTML diff report or plain text file for documentation.

Common Use Cases

• •Comparing original and revised contract PDFs to identify changed clauses, added obligations, or deleted terms before signing
• •Verifying that proofreading corrections submitted as a revised PDF were all accurately applied to the final published version
• •Tracking word-for-word changes between successive versions of regulatory compliance documents for audit trails
• •Comparing translated PDF documents against the source text to detect omissions, additions, or mistranslations
• •Auditing differences between draft and final versions of government policy documents or legislation PDFs

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