PDFixel

E-Signature & Sign PDF

Advanced Settings

Workflow Mode

Attach Certificate of Completion

Appends an official tamper-proof SHA-256 digital evidence page (eIDAS & ESIGN compliant).

Envelope ID:ENV-INIT-2026

Doc Hash:Pending

Learn & Help

How to Sign and Complete PDF Documents Online

1Upload PDF Document
Drag and drop your PDF agreement, contract, or form directly into the browser workspace.
2Add Signatures & Form Fields
Draw freehand, type in elegant cursive typography, upload a transparent signature image, or place date, name, and checkbox fields.
3Configure Multi-Signer Roles & Style
Assign signers (Signer, Approver, CC, Witness) with distinct colors, adjust font sizes, rotations, and ink absorption blend modes.
4Sign & Download with Certificate
Apply signatures and instantly download your tamper-proof signed PDF complete with an official SHA-256 Certificate of Completion.

Signature Mode (Draw / Type / Upload): Draw freehand with stylus/mouse, choose cursive typography, or upload a PNG signature file.
Form Fields (Date, Name, Checkbox, Text): Place drag-and-drop form fields anywhere on your PDF with automatic date formatting.
Ink Absorption Blend Mode: Blends signature ink realistically into the document paper using multiply blending.
Certificate of Completion: Embeds an official cryptographic audit trail page with SHA-256 hashes.

ESIGN & eIDAS Compliance
Generates legally binding electronic signatures with timestamped audit logs.
SHA-256 Audit Certificate
Attaches an immutable Certificate of Completion containing document hashes and signer metadata.
Multi-Signer Workflow
Assign distinct roles (Signer, Approver, CC, Viewer, Witness) with color-coded field boxes.
3 Signature Creation Modes
Draw with smooth ink lines, type using 6 cursive handwriting fonts, or upload transparent PNG signatures.
Advanced Field Styling
Fine-tune font families, font sizes (8-36pt), colors, rotation angles (-90° to +90°), and ink blend modes.
100% Client-Side Private
Your confidential legal contracts never leave your computer or touch external servers.

Yes. PDFixel adheres to the US ESIGN Act, UETA, and EU eIDAS regulations by embedding cryptographic SHA-256 document fingerprints, signer timestamps, unique envelope identifiers, and immutable event logs into an attached Certificate of Completion.

When you place a signature or stamp, the Multiply blend mode mathematically multiplies the ink luminance with underlying page fibers, ensuring your signature appears naturally embedded on paper rather than floating as an artificial flat overlay.

Yes. You can create multiple participant profiles (Signer 1, Signer 2, Approver, Witness) with dedicated color tags, allowing each party to complete their designated signature, initials, date, and text fields.

The certificate records the initial document SHA-256 hash, final signed hash, unique envelope ID, UTC completion timestamp, signer identities, IP/device user agents, and page-by-page field placement coordinates.

Yes. When uploading a signature image (PNG or JPG), PDFixel automatically applies white background knockout with adjustable tolerance to extract clean transparent ink lines.

E-Signature & Sign PDF

Add secure digital signatures, form fields, and audit-verified timestamps with zero server uploads.

Drop PDF document here to Sign

or click to browse • ESIGN & eIDAS compliant

Max 100MB per fileSingle file

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