Secure File Transfer

Send documents.
Prove they weren't changed.

Secure file transfer with built-in document verification. DocMind proves your document arrived intact — cryptographically. Standard file-sharing tools confirm delivery. DocMind guarantees integrity.

Documents remain private and inaccessible to DocMind by design. Patent pending technology.

Send a document securely →Verify a document
The Gap in Standard File Transfer

File delivery ≠ document integrity

Standard file-sharing platforms — whether cloud storage, email attachments, or dedicated transfer tools — confirm that a file was delivered. They tell you it was received. But they tell you nothing about whether the document was changed after leaving your hands.

A contract sent through any standard channel can be downloaded, altered, and re-shared — with no indication anything changed. The recipient has no way to verify they're looking at the original.

  • Contract altered after sending — terms changed, counterparty claims it's the original
  • Invoice modified in transit — bank details changed to redirect payment
  • Legal document tampered — signature page swapped, liability clause removed
  • No audit trail — you can't prove who accessed the file or when
DocMind's Approach

Send + verify in one platform

DocMind seals your document with a SHA-256 hash before sending. When the recipient opens the link, they can verify that the file is byte-for-byte identical to what you sent. Any modification is instantly detected.

📤
Send
Upload your document. DocMind seals it with a SHA-256 hash and generates a secure, time-limited share link.
🔐
Seal
The document receives a unique verification seal. Any tampering between send and receipt is detected instantly.
Verify
The recipient verifies the document at docmind.nl/v — proving it matches the original you sent, byte for byte.

Everything you need for secure document transfer

📨
Time-limited links
Links expire after 1, 7, or 30 days. Or set a maximum number of downloads.
🔐
Hash integrity proof
SHA-256 seal on every document. Instantly detect any modification in transit.
👁️
Zero-knowledge privacy
Content is never read or stored by DocMind. Only the cryptographic hash.
🔍
Embedded verification QR
QR code in the document points to the verification portal. Works permanently.
📋
Download audit trail
Log every access: who opened the link, when, and from where.
↩️
Recipient can reply
Allow the recipient to upload documents back to you in the same session.
🔢
Download limits
Limit downloads to 1×, 5×, or unlimited. Perfect for confidential documents.
📬
Personal message
Add a personal note to the recipient alongside the document.

DocMind vs. standard file-sharing platforms

Most platforms stop at delivery. DocMind adds cryptographic proof of integrity.

Feature
DocMind
Standard platforms
File transfer
Document integrity verification
Hash integrity check
Tamper detection in transit
Zero-knowledge privacy
Seal code (proof of origin)
Embedded verification QR
Full access audit trail
Time-limited links
Download limits
Varies
Recipient can reply & upload
GDPR-compliant audit trail

™ Patent pending technology · Documents remain private and inaccessible to DocMind by design.

Start sending documents securely

Free for up to 3 documents. No credit card required.

Get started free →Verify a document
Specific use cases
Send a contract securelySend legal documentsContract verification