Sign NDAs Online — Keep Confidential Documents Private
Non-disclosure agreements exist to protect sensitive information. SigPDF lets you sign NDAs entirely in your browser — your confidential document never touches a third-party server.
No server uploadLegally valid (ESIGN / eIDAS)No account requiredFrom €2.08/month
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The Irony of Uploading an NDA to a Cloud Service
An NDA is designed to keep information confidential. Yet most online signing tools require you to upload the document to their servers — meaning a third-party company now has a copy of the very agreement meant to remain private. Their employees may have access. Their servers may be compromised. Their data retention policies may keep your NDA stored for years.
SigPDF eliminates this contradiction entirely. When you sign an NDA with SigPDF, your document is processed using client-side JavaScript inside your own browser. The PDF is never transmitted over the internet, never stored on a remote server, and never accessible to anyone but you.
When You Need to Sign an NDA
- Job interviews and hiring — Employers often require candidates to sign an NDA before sharing details about proprietary projects during the interview process.
- Freelance and contractor work — Before starting a project, clients frequently ask freelancers to sign an NDA covering trade secrets or unreleased products.
- Investment and fundraising — Startups share business plans and financial projections with potential investors under NDA protection.
- Partnerships and collaborations — When two companies explore a joint venture, both sides typically sign mutual NDAs before exchanging proprietary information.
- Mergers and acquisitions — Due diligence processes involve sharing deeply sensitive financial, legal, and operational data under strict NDA terms.
Legal Validity of Electronically Signed NDAs
- ESIGN Act (United States) — Electronic signatures on NDAs are legally binding and enforceable in all 50 states.
- eIDAS Regulation (European Union) — A simple electronic signature cannot be denied legal effect solely because it is in electronic form. Applies across all EU and EEA member states.
- UK, Canada, Australia — Each has equivalent legislation (Electronic Communications Act, PIPEDA, Electronic Transactions Act) recognizing electronic signatures on confidentiality agreements.
How to Sign an NDA with SigPDF
- Open your NDA PDF in the editor above — drag and drop or click to browse
- Create your signature by drawing, typing your name, or uploading a signature image
- Click on the signature line to place your signature
- Add the date and any other required text fields
- Download the signed NDA — ready to send back to the other party
Types of NDAs You Can Sign
- Unilateral (one-way) non-disclosure agreements
- Mutual (two-way) non-disclosure agreements
- Multilateral non-disclosure agreements
- Employee confidentiality agreements
- Consultant and contractor NDAs
- Investor and due-diligence NDAs
Frequently Asked Questions
Are electronically signed NDAs legally valid?
Yes. An NDA signed electronically is just as enforceable as one signed with pen and paper. The ESIGN Act (US) makes electronic signatures on NDAs legally binding in all 50 states. The eIDAS Regulation (EU) provides that a simple electronic signature cannot be denied legal effect solely because it is in electronic form.
When do you need to sign an NDA?
NDAs appear at nearly every stage of business: job interviews and hiring, freelance and contractor work, investment and fundraising, partnerships and collaborations, and mergers and acquisitions due diligence processes.
What types of NDAs can you sign with SigPDF?
SigPDF works with any NDA in PDF format: unilateral (one-way) NDAs, mutual (two-way) NDAs, multilateral NDAs, employee confidentiality agreements, consultant and contractor NDAs, and investor NDAs.
Is my NDA uploaded to a server when I sign with SigPDF?
No. SigPDF processes your document entirely in your browser using client-side JavaScript. Your NDA never leaves your device — no upload, no cloud storage, no third-party access.
How much does SigPDF cost for signing NDAs?
SigPDF costs from €2.08/month (billed annually) with unlimited document signatures. There are no per-document fees and no envelope limits. You can preview the result for free before subscribing.
Can I sign an NDA on my phone?
Yes. SigPDF works in any mobile browser on iPhone, iPad, and Android. Draw your signature with your finger, place it on the NDA, and download the signed document — all without installing an app.
What is the difference between an NDA and a confidentiality agreement?
Functionally, they are the same thing. 'NDA' (non-disclosure agreement) and 'confidentiality agreement' are used interchangeably. Both legally bind the signing party to keep specified information private. SigPDF can sign both.