D Docs Portal

World's first · Hybrid signing engine

Hybrid Digital
Signingby Gravixia

The first application to let every signatory sign with whatever credential they trust — and have it sealed for the world.

7Ways to sign
50 yrFree certificate
AATLGlobal validity
GRAVIXIA · AATL ENABLED · INTERNATIONAL VALIDITY · COUNTER-SIGNED · G

Seven signing mechanisms

Bring any credential. Or use ours.

Choose the signing method that fits your trust model and your environment. Web works everywhere; some hardware-backed methods need the desktop app because the operating system only exposes them there.

01

Gravixia free certificate

Every signatory gets a free digital certificate valid for 50 years — whether or not they hold a Gravixia account. Use it to sign straight away, with nothing to buy and nothing to install.

Web + Desktop
02

Your certificate from a PFX file

Bring your own · PFX

Upload a password-protected PFX/PKCS#12 file and sign with a certificate you already own.

Web + Desktop
03

Your certificate from the certificate store

Bring your own · Cert store

Sign with a certificate already installed in your machine's local certificate store.

OS limitation: only a desktop app can read the local certificate store.
Desktop only
04

Your certificate from a USB token

Bring your own · USB token

Sign with a certificate held on a hardware USB security token plugged into your machine.

OS limitation: only a desktop app can access a USB token.
Desktop only
05

Your certificate from a smartcard

Bring your own · Smartcard

Sign with a certificate stored on a smartcard read through your local card reader.

OS limitation: only a desktop app can access a smartcard.
Desktop only
06

Your certificate from Azure Key Vault

Bring your own · Azure

Sign using a certificate managed in Azure Key Vault's certificate manager — the key never leaves the cloud HSM.

Web + Desktop
07

Your certificate from AWS Certificate Manager

Bring your own · AWS

Sign using a certificate managed in AWS Certificate Manager — keys stay protected in AWS.

Web + Desktop

Pick exactly one mechanism to place your signature.

SEALED BY GRAVIXIA · AATL TRUSTED · RECOGNISED WORLDWIDE ·

The final step

One signature is yours.
The seal is the world's.

However you signed — free certificate, PFX, certificate store, USB token, smartcard, Azure Key Vault or AWS Certificate Manager — Gravixia counter-signs every finished document with its AATL-enabled certificate. That single seal carries the document across borders with internationally recognised trust.

Adobe Approved Trust List · Counter-signed