All PDF Tools & Utilities
Select a utility from the left sidebar or the cards below. All diff algorithms, document transformations, and IRS tax forms execute 100% inside your browser's private memory sandbox with zero cloud uploads.
IRS Tax Form Fillers & Generators
New ModuleFill official IRS tax forms step-by-step with instant client-side PDF generation. Zero cloud data storage.
IRS Form W-8BEN Filler
Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding. For non-U.S. freelancers, creators, and contractors.
IRS Form W-9 Filler
Request for Taxpayer Identification Number and Certification. Enter your SSN/EIN securely to prevent backup withholding.
PDF Comparison & Diff Utilities
Core EngineSide-by-side visual diffing, text redline comparator, and confidential legal contract auditing.
Compare Two PDF Files Online
Side-by-side authentic A4 document viewer with word-level Myers diff, synchronized dual scroll, and visual layout inspection.
Compare PDF Online
Side-by-side visual and textual document diffing with synchronized scrolling, difference count, and page heatmaps.
PDF Compare Online Tool
High-speed browser diffing engine for reviewing multi-page document revisions without server uploads.
Legal Contract & Agreement Diff
Specialized redline comparison for legal counsel and procurement. Detect altered indemnity clauses and sneakily modified terms.
Visual Layout & Drawing Diff
X-Ray pixel overlay slider for architectural CAD blueprints, marketing brochures, and typographic layout revisions.
Text Redline Comparator
Granular character and word-level diffing. Highlights additions in emerald green and deletions in red with strike-through.
PDF Converters & Formatters
Fast & PrivateTransform raw text, formatted notes, and code snippets into clean, paginated PDF documents.
Why Sensitive Records Never Touch Cloud Servers on PdfCompare
All algorithms, diff computations, and IRS tax forms execute inside your browser's private WebAssembly memory sandbox. No login required, free forever.