How do I sign a document online?

Simply upload your PDF agreement, drag and drop signature tags, initials, and name blocks onto the pages, and enter your signer's email address. The signer receives a secure link, opens it on their device, and draws or types their signature.

Are online electronic signatures legally binding?

Yes. In the United States, electronic signatures are legally binding under the ESIGN Act and UETA. In the European Union, they are governed by eIDAS. Indigo eSign produces fully compliant audit logs and secure document hashes to maintain court admissibility.

Do my signers need to create an account?

No. Your clients, vendors, or partners do not need to register, pay, or install any software. They click the secure email invite link and sign directly inside their browser on mobile or desktop.

Can I sign documents on my mobile phone or tablet?

Yes! Indigo eSign is fully optimized for touchscreens. Signers can open documents on iOS (iPhone/iPad) or Android devices and sign with their finger or stylus without downloading an app.

How does the Audit Trail Certificate protect me legally?

Every completed document includes a cryptographic Audit Trail Certificate recording signer IP addresses, email verifications, UTC timestamps, and document hashes. This provides court-admissible proof of execution.

What file formats are supported?

Indigo eSign is optimized for secure PDF documents. Converting files to PDF prior to upload ensures absolute format preservation, correct tag alignments, and high readability across all screens.

Fast, Legal & Secure eSignatures

How to Sign a Document Online in 3 Steps

Execute legally-binding digital contracts in minutes with Indigo eSign. Upload PDFs, assign signature tags with AI pre-flight review, and receive court-admissible audit trail certificates instantly.

Step 01

Upload & Import PDF

Upload documents or sync natively from Google Drive, Dropbox, or OneDrive.

Step 02

Place Tags & AI Review

Drag and drop signature lines while AI checks for missing date & tag fields.

Step 03

Sign & Get Audit Certificate

Signers click-to-sign on any device. Download complete SHA-256 legal audit logs.

Upload Your PDF Document Securely

Drag and drop your PDF contracts directly into your personal Indigo eSign dashboard. Your files are instantly encrypted with bank-grade 256-bit AES encryption before processing begins.

Import documents natively from Google Drive, Dropbox, and Microsoft OneDrive.
High-volume PDF engine supporting multi-page agreements, NDAs, and commercial leases.
Automated format preservation guarantees clean document rendering across all devices.

Drag & Drop file to upload

Secure PDFs • Encrypted

nda_agreement_final.pdf

Place Fields & Run AI Compliance Review

Use our drag-and-drop visual editor to place signature lines, initial tags, date placeholders, and text inputs. Before dispatching, Indigo eSign's AI pre-flight inspector checks your document to prevent missing fields or unassigned lines.

Multi-signer workflow: Color-coded field tags and custom signing order controls.
Built-in AI Pre-Flight Scan flags unassigned tags and dates to prevent signature loop restarts.
Reusable template library for high-frequency contracts and onboarding forms.

Interactive Editor

Sign Here

Track Real-Time Signatures & Audit Trail

Send secure signing links directly to recipient emails. Recipients can review and legally sign on mobile or desktop without creating an account. Once signed, a tamper-proof SHA-256 Audit Trail Certificate is generated automatically.

No signer registration needed—recipients sign in 1-click on any device browser.
Court-admissible Audit Trail recording signer IP addresses, email logs, and UTC timestamps.
Instant completion PDF delivery to all participants and cloud backups.

Audit Trail Timeline

Document Uploaded

IP: 192.168.1.15 • 10:42 AM

Email Invitation Delivered

to client@example.com • 10:43 AM

Legally Signed & Completed

IP: 74.125.19.102 • Verified Seal

Sign Documents Anywhere on Any Device

Indigo eSign is engineered for total cross-platform freedom. Signers do not need to download an application, register, or pay. Open document invites seamlessly across all major operating systems and web browsers.

iPhone & iPad (iOS)

Android Phones & Tablets

Mac & Windows PC

Google Chrome & Safari

ESIGN & UETA Compliant

Frequently Asked Questions

Ready to Sign Your First Document?

Simplify workflows, prevent document errors, and get your contracts completed in minutes.

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