The world's most powerful collection of free PDF tools. Merge, edit, convert, compress, and secure documents. Fast, secure, and professional.
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Merge PDF Files
Combine multiple PDF pages and reports into a single unified document. Arrange pages locally in your browser with zero data upload.
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Split PDF Pages
Extract specific page ranges, split one document into multiple files, or isolate visual selections using browser-based WebAssembly.
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Compress PDF Files
Reduce PDF file size for easy email sharing. Optimize images and compress embedded font metadata locally on your device.
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Convert PDF to Word (DOCX)
Transform PDF documents into fully editable Microsoft Word files, preserving layout flow, fonts, and grid-based tables.
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Convert Word to PDF
Convert standard docx and legacy doc files into portable PDFs with pixel-perfect visual alignment and A4 scaling.
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OCR PDF Text Recognition
Scan text from photos and non-selectable PDF documents using browser-based character recognition engine.
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Sign and Annotate PDF
Add digital signatures, draw, type cursive signatures, and annotate contracts safely without cloud uploads.
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Organize PDF Pages
Rearrange, delete, and rotate pages in your documents dynamically before finalizing export.
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Add Page Numbers to PDF
Stitch customized pagination directly to page templates in header or footer positions.
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Edit PDF Metadata
Modify document author, title, keywords, subject, and software producer fields instantly.
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Crop PDF Margins
Set custom cropping boundaries for document printable areas to eliminate unnecessary margins.
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Convert PDF to Excel Spreadsheet
Extract tabular text structures from PDFs directly into spreadsheet worksheets.
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Redact PDF Content
Permanently black out and delete private characters or logos to avoid metadata leaks.
Understanding Serverless Document Conversions and Privacy
In the digital age, corporate privacy and data security are paramount. Most online converter tools require you to upload sensitive files, financial records, and legal contracts to remote servers. Once uploaded, you lose visibility of where your data goes, who has access, and how long it remains cached in server logs.
UKPDF solves this compliance risk by utilizing advanced client-side processing. By running WebAssembly modules and JavaScript parsers directly in your local browser sandbox, we ensure that your files never leave your device. This secure serverless design conforms with GDPR, HIPAA, and strict company IT audits, providing high-fidelity, high-speed document tools completely free of charge.