PDF Vault — Privacy-First Offline PDF Suite

PDF Vault is a complete PDF toolkit that runs entirely inside your browser. You can merge, split, compress, sign, OCR, convert and protect documents without a single file ever being uploaded to a server.

Every mainstream free PDF service works the same way: you hand the file to a website, it travels to a datacentre you have never seen, a copy sits in third-party storage for somewhere between an hour and a day, and you get a download link back. For a holiday itinerary, fine. For a signed contract, a medical record, a tax return, a payroll export or anything covered by a data protection policy at work, that is a genuine exposure — and on a managed corporate machine, uploading it may itself be a reportable event.

PDF Vault removes the upload from the equation. There is no retention window to worry about, no vendor employee with access to your document, and no breach of ours that could ever involve your files, because we do not have them and never did.

How it works

1. Drop in your file. The document is read straight into your browser's memory. There is no upload request, because there is no endpoint to send it to.
2. Work on it locally. Merging, signing, OCR, conversion and compression all run as WebAssembly on your own processor.
3. Download the result. The finished file is written directly to your downloads folder. Nothing is retained anywhere, because nothing was ever transmitted.

Every tool in PDF Vault

• PDF Editor & Annotation SuitePDF Vault's editor lets you open, annotate, highlight, and edit a PDF entirely inside your browser, with the file never leaving your device.
• Merge PDF FilesYou can merge PDF files without uploading them by combining the documents locally in your browser, so the merged file is built on your own machine.
• Split PDFSplitting a PDF in PDF Vault extracts pages or breaks a document into separate files entirely on your device, with no upload.
• Compress PDFPDF Vault compresses a PDF by re-encoding and downsampling its images in your browser, typically cutting scan-heavy files by 40-70% without uploading them.
• Organize PDF PagesPDF Vault lets you reorder, rotate, and delete PDF pages in a visual editor that runs entirely in your browser.
• Sign PDFPDF Vault lets you sign a PDF by drawing, typing, or uploading a signature and placing it on the page locally, so neither the document nor the signature is ever uploaded.
• Image to PDFPDF Vault converts JPG, PNG, and scanned images into a single PDF in your browser, without sending the photos to a server.
• OCR Text RecognitionPDF Vault runs OCR on scanned PDFs and images entirely in your browser using a local Tesseract engine, so sensitive scans are never uploaded to a cloud OCR service.
• PDF to WordPDF Vault converts a PDF into an editable Word (.docx) document using a client-side layout engine, so the file is never uploaded to a conversion service.
• Word to PDFPDF Vault converts Word (.docx) documents into PDFs in your browser using a client-side layout engine, with no upload.
• PDF to ImagePDF Vault exports PDF pages as high-resolution JPG or PNG images, rendered locally in your browser with no upload.
• Watermark PDFPDF Vault adds a text or stamp watermark across the pages of a PDF locally in your browser, with no upload.
• Protect PDFPDF Vault password-protects a PDF using standard encryption applied in your browser, so neither the file nor the password is ever transmitted.
• Unlock PDFPDF Vault removes password protection from a PDF you own by decrypting it locally in your browser, using the password you supply.
• Sanitize PDFPDF Vault strips metadata, author information, and hidden data from a PDF locally, so you can share a document without leaking who made it and how.
• Bates StampingPDF Vault applies Bates numbering to legal PDFs entirely in your browser, so discovery documents are stamped without ever being uploaded.
• Webpage to PDFPDF Vault converts web page content into a clean, readable PDF in your browser, without routing the page through a rendering server.
• Image ResizerPDF Vault resizes and optimises images in your browser, with no upload to an image-processing service.

Why offline processing matters

You do not have to take the privacy claim on trust. Open your browser's developer tools, switch to the Network tab, and run any tool on this site. You will not see a request carrying your document, because none is made. That is a stronger guarantee than a privacy policy, which is ultimately a promise about what a company intends to do with a file it already has.

There is one honest tradeoff. Very large files and heavy OCR jobs run faster on a datacentre GPU than on a laptop CPU. If you routinely process gigabyte-scale scan archives, a server-based tool will finish sooner. For everyday work — contracts, invoices, forms, reports and scans under a few hundred pages — local processing is usually faster anyway, because you skip the upload and download entirely.

Install it and work offline

PDF Vault is a Progressive Web App. Install it from your browser's address bar, or in Safari via File then Add to Dock, and it behaves like a native application with its own window. After the first load the whole suite is cached on your device, so merging, splitting, signing and compressing all keep working with no network connection at all.

Free and Pro

The free plan gives you three operations a day, forever, with no account and no email address required. PDF Vault Pro removes the daily limit from $10 a month billed yearly, or $15 month to month. Either way the processing model is identical: everything happens on your device. See the frequently asked questions for details, or read the guides on document privacy.