Zero-Knowledge Processing

Your Documents Deserve
a Vault, Not a Server.

Professional PDF tools built for lawyers, accountants, HR, and healthcare professionals. Your files never leave your device — not a promise, an architectural fact.

Zero Server Upload
GDPR Compliant
Works Offline
No Size Limit
No Account Required
0 bytes sent to server · All processing in your browser
PDF Tools

Everything You Need, Nothing You Risk

Every tool runs entirely in your browser. Your documents are never uploaded, transmitted, or stored on any server.

How It Works

Three Steps. Zero Risk.

Traditional PDF tools upload your files to remote servers. VaultPDF processes everything locally in your browser.

1
Your device

Select Your File

Drop your PDF into the tool. The file stays in your browser memory — never transmitted anywhere.

2
Your browser

Process Locally

Our engine runs entirely in your browser. Watch the live proof: 0 bytes sent to any server.

3
Your file

Download Instantly

Your processed file is ready immediately. No waiting, no email, no account required.

Built For Professionals

Trusted by Those Who Cannot Afford a Breach

When your documents contain client data protected by law, "we delete files after 1 hour" is not enough. No size limit. No server. Secure.

VaultPDF Exclusive

Privacy Certificate for Every Document

After processing any PDF, download a verifiable certificate proving that your document was handled with zero server contact. Attach it to compliance records, client files, or audit trails.

Timestamped proof of zero-upload processing
GDPR Article 25 compliance documentation
Downloadable PDF for your records
Shareable with clients and auditors

VaultPDF Privacy Certificate

Zero-Knowledge Verification

Documentcontract_final.pdf
ProcessedJuly 2, 2026 — 22:45 UTC
Bytes sent to server0
Processing methodClient-side only
ComplianceGDPR Art.25 — by design
✅ Verified — Zero-Knowledge Processing
Compress PDF

Reduce File Size. Keep Your Privacy.

Drop your PDF below. Everything happens in your browser — we never see, receive, or store your file. No size limit.

Drop your PDF here

or click to browse · No size limit · 100% local processing

document.pdf0 KB
Compression level
⚡ Processing locally · 0 bytes sent to server · Secure
Original
Compressed
Reduced
About VaultPDF

We Built the Tools We Needed but Couldn't Find

VaultPDF was born from a simple observation: every existing PDF tool asks you to upload your documents to their servers. For professionals handling contracts, medical records, financial statements, and classified information — that is unacceptable.

We engineered a fundamentally different architecture. Every VaultPDF tool processes your documents entirely in your browser using client-side JavaScript and WebAssembly. Your files never leave your device — not during processing, not after, not ever. This is not a policy. It is a technical impossibility.

0
Bytes ever sent to our servers
100%
Client-side processing
6+
Professional PDF tools
Développé par ZALTEN — Sites & outils web sur mesure