Sign PDF with digital signature (DSC)
A real digital signature from your DSC, not a picture of one.
🔒 Your files never leave your deviceHow to use
- Add your PDF
- Choose your DSC token or .pfx file, and where the signature box goes
- Enter the PIN or password, then download the signed PDF
About this tool
GST invoices, MCA and ROC forms, tenders, Form 16 and company documents often need a PDF signed with a Digital Signature Certificate (DSC). Pixel Path PDF adds a genuine PDF digital signature (SHA-256) with a visible "Digitally signed by" box, which Adobe Acrobat Reader shows in its signature panel.
Use a USB token DSC (ePass2003, ProxKey, mToken, WatchData and others) with the free Pixel Path PDF Windows app: Windows lists the certificate and the token asks for its PIN, so the private key never leaves the token. A DSC saved as a .pfx or .p12 file also works here in the browser.
Frequently asked questions
Which certificates work?
Class 2 and Class 3 signing certificates from any Indian certifying authority, such as eMudhra, Capricorn, Sify, (n)Code, Pantasign or VSign, on a USB token or as a .pfx file.
Why does Adobe say the signature validity is unknown?
Adobe shows a signature as valid once it trusts the certifying authority. On a new PC, open Edit → Preferences → Signatures → Identities & Trusted Certificates in Adobe Reader and trust the CCA India root, or ask the recipient to do so.
Is my certificate uploaded?
No. A .pfx file and its password are read in your browser, and a USB token signs on your PC. Nothing is sent to a server.
Can two people sign the same PDF?
Not yet: signing a PDF that already has a digital signature here would break the first signature. The last signer should use another signing tool for now.
Are my files uploaded to a server?
No. Sign PDF with digital signature (DSC) runs inside your browser, so your document never leaves your phone or computer. Close the tab and nothing is kept.
Is Sign PDF with digital signature (DSC) free?
Yes. You can use it free without creating an account. Premium removes file-size and batch limits for heavy users.
Does it work on mobile?
Yes. It works in Chrome, Safari and every modern browser on Android, iPhone, Windows and Mac. You can also install Pixel Path PDF as an app from your browser menu.