Powerful features for secure document signing
Everything you need to send, sign, and verify documents with cryptographic certainty.
Document Management
Smart tools. Seamless workflows. Complete control.
From upload to signature, Zdottedline makes it easy to prepare, send, and manage documents at scale.
Drag-and-Drop Upload
Upload PDFs instantly. Supports files up to 20MB, with file content verified before it is accepted.
Document Templates
Create reusable templates with pre-placed fields. Send contracts, NDAs, and agreements in seconds with consistent formatting.
Signing Workflow
Streamlined. Secure. Effortless.
From invitation to signature, every step is designed to be simple for you and seamless for your signers. Legally binding, ESIGN Act and eIDAS compliant, with bank-level encryption end-to-end.
Multi-Party Signing
Sequential or parallel signing order. Define exactly who signs when, with automatic routing to the next signer.
Multiple Signature Types
Draw, type, or upload a signature image. Support for initials, date fields, checkboxes, dropdowns, and free-text fields.
No Account Required
Signers receive a secure link via email. They can view and sign without creating an account or downloading any software.
Automated Reminders
Set up automatic email reminders for unsigned documents. Customize frequency and escalation rules.
Security & Compliance
Built on cryptographic proof. Backed by industry standards.
Zdottedline combines enterprise-grade security with blockchain verifiability to protect your documents and your business.
Blockchain Verification
Every document event is hashed and anchored to the Polygon Blockchain. Creates an immutable, independently verifiable record.
SHA-256 Hash Chain
From upload to completion, every action extends a cryptographic hash chain. Any tampering invalidates the entire document history.
7-Year Audit Trail
Complete audit logs with IP addresses, timestamps, and user agents. Archived to encrypted cold storage for 7-year legal retention.
Access Controls
Require access codes, two-factor authentication, or email verification before signers can view documents.
Enterprise
Built for scale. Designed for control.
Zdottedline empowers organizations with the tools, security, and flexibility they need to manage documents at enterprise scale. Uptime commitments are set out in our SLA, with priority support and a dedicated success manager.
Team Management
Invite team members, assign roles (owner, admin, member), and control who can create, send, and manage documents.
API Access
RESTful API with comprehensive documentation. Integrate Zdottedline into your existing workflows and applications.
Every layer, secured
From encryption to compliance, see exactly how Zdottedline protects your documents at every stage.
Encryption
End-to-End Protection for Your Documents
- AES-256 server-side encryption at rest in AWS S3
- TLS 1.2+ enforced on all connections with HSTS preload
Authentication
Secure Access. Protected Accounts.
- Bcrypt hashing (cost 12) with complexity requirements
- Short-lived JWT tokens (15 min) with HttpOnly refresh cookies
- Account lockout after 5 failed attempts, 2FA available
Document Integrity
Cryptographically secure. Tamper-evident by design.
- SHA-256 hash chain from upload through completion
- Polygon blockchain anchoring at key document events
- Merkle tree audit trail for independent third-party verification
Compliance
Legally binding. Globally compliant. Built for trust.
- ESIGN Act & UETA — legally binding in the US
- eIDAS Electronic Signatures for the EU
- GDPR compliant, HIPAA-ready workflows
Infrastructure
Secure. Monitored. Backed up.
- AWS hosting with automated backups & point-in-time recovery
- WAF, rate limiting, and IP-based admin access controls
- CloudWatch monitoring with automated alerting
Verified on Polygon
Every signed document is anchored to the Polygon blockchain, creating an immutable, independently verifiable proof of authenticity. The decentralized ledger ensures data cannot be altered or erased — giving you tamper-proof, transparent, and legally defensible records that any third party can verify.
Ready to get started?
Create your free account and send your first document in minutes. No credit card required.