Free Electronic Signature: Sign Documents Online Free
Create a free electronic signature and sign documents online in minutes. OpenSign™ offers free, legally binding eSignatures with templates and an audit trail.
Read guide →eSignature guides & comparisons
Explore OpenSign™ resources: free eSignature solutions, step-by-step signing guides, and honest comparisons with DocuSign, DocuSeal and other alternatives.
Free eSignature Solutions
Sign PDFs, contracts and documents online for free with legally binding electronic and digital signatures.
Free Digital Signature: Secure, Legally Binding & Online
Add a free digital signature to PDFs and documents online. OpenSign™ secures every signature with encryption and a tamper-evident audit trail — free and open source.
Read guide →Sign a PDF Online for Free
Sign any PDF online for free with OpenSign™. Add your signature, initials, date and text to a PDF in your browser — legally binding, no software to install.
Read guide →Sign Documents Online Free
Sign documents online free with OpenSign™. Upload, sign and send any document for signature in your browser — unlimited, legally binding and open source.
Read guide →Free Contract Signing Software
Sign and send contracts online with free contract signing software. OpenSign™ offers templates, multi-party signing and an audit trail — free and open source.
Read guide →Free Document Signing Software
OpenSign™ is free document signing software for individuals and teams. Sign, send and manage documents with templates, an audit trail and an API — free and open source.
Read guide →Self-Hosted eSignature Software (Own Your Data)
Run eSignatures on your own servers with OpenSign™, self-hosted and open source. Keep signed documents inside your infrastructure for GDPR, HIPAA and data control.
Read guide →Free NDA Template — Create & Sign Online
Use a free NDA template to create, send and sign a non-disclosure agreement online. OpenSign™ makes NDAs legally binding with templates and an audit trail — free.
Read guide →Bulk Send Documents for Signature
Send the same document to many signers at once with OpenSign™ bulk send. Generate signature requests from one template in minutes — free and open source.
Read guide →eSignatures for HR: Offer Letters & Onboarding
Streamline hiring with eSignatures for HR. Send offer letters, NDAs and onboarding paperwork for signature with OpenSign™ — free, with templates and an audit trail.
Read guide →eSignatures for Real Estate & Agencies
Close deals faster with eSignatures for real estate. Send listing agreements, leases and disclosures for signature with OpenSign™ — free, legally binding and mobile-friendly.
Read guide →GDPR & HIPAA-Compliant eSignatures
Meet GDPR and HIPAA requirements with self-hosted, open-source eSignatures. OpenSign™ keeps signed documents and audit data inside your own infrastructure.
Read guide →Best Free eSignature Software for Small Business
The best free eSignature software for small business in 2026. OpenSign™ offers unlimited signing, templates, teams and an API at no cost — built for SMBs and startups.
Read guide →DocuSign Alternatives & Comparisons
See how OpenSign compares to DocuSign, DocuSeal and other eSignature tools — and why teams switch to a free, open-source alternative.
The Best Free DocuSign Alternative in 2026
Looking for a free DocuSign alternative? OpenSign™ lets you sign unlimited documents online for free, with legally binding eSignatures, templates and an audit trail. No credit card required.
Read guide →7 Best DocuSign Alternatives in 2026 (Free & Paid)
Compare the best DocuSign alternatives in 2026 — including free and open-source eSignature tools. See features, pricing and which DocuSign competitor fits your team.
Read guide →The Best Open-Source DocuSign Alternative
OpenSign™ is the best open-source DocuSign alternative — self-hostable, transparent and free. Own your documents and data with an open-source eSignature platform.
Read guide →OpenSign vs DocuSign: A Side-by-Side Comparison
OpenSign vs DocuSign compared: pricing, features, open source, self-hosting and data ownership. See why teams switch from DocuSign to the free OpenSign alternative.
Read guide →OpenSign vs DocuSeal: Which Open-Source eSignature Wins?
OpenSign vs DocuSeal compared: features, self-hosting, templates, API and ease of use. See which open-source eSignature platform is right for your team.
Read guide →Cheap DocuSign Alternatives: Sign for Less (or Free)
Looking for a cheaper alternative to DocuSign? Compare affordable and free eSignature tools. OpenSign™ offers unlimited free signing and low-cost paid plans.
Read guide →DocuSign Pricing Explained — and How to Sign for $0
A clear breakdown of DocuSign pricing plans and hidden limits in 2026 — and how to sign unlimited documents for $0 with OpenSign™, the free open-source alternative.
Read guide →OpenSign vs PandaDoc: Which Should You Choose?
OpenSign vs PandaDoc compared: eSignatures, document workflows, pricing and open source. See which tool fits your team — free signing or all-in-one sales documents.
Read guide →OpenSign vs SignWell: Free eSignature Comparison
OpenSign vs SignWell compared: free tiers, document limits, templates and open source. See which simple eSignature tool gives you more for free.
Read guide →OpenSign vs Dropbox Sign (HelloSign): Compared
OpenSign vs Dropbox Sign (formerly HelloSign) compared: free plans, features, open source and self-hosting. Find the best eSignature tool for your workflow.
Read guide →Free Adobe Acrobat Sign Alternative
Looking for a free Adobe Acrobat Sign alternative? OpenSign™ signs PDFs online for free with templates, an audit trail and an API — open source and self-hostable.
Read guide →eSignature Guides
Step-by-step guides and developer resources for signing documents online and automating signature workflows.
How to Sign a Document Online (Step-by-Step, 2026)
Learn how to sign a document online in 5 simple steps. This free guide shows how to add a legally binding eSignature to a PDF and send documents for signature.
Read guide →eSignature API: Add Document Signing to Your App
Integrate signing into your product with the OpenSign™ eSignature API. Create documents, send signature requests and receive webhooks — free, open source and developer-friendly.
Read guide →Are Electronic Signatures Legally Binding?
Yes — electronic signatures are legally binding under the ESIGN Act, UETA and eIDAS. Learn what makes an eSignature valid and how OpenSign™ ensures enforceability.
Read guide →How to Sign a PDF on iPhone or Android
Learn how to sign a PDF on your iPhone or Android phone for free. Step-by-step guide to adding a legally binding signature to a PDF in your mobile browser.
Read guide →Digital Signature vs Electronic Signature: The Difference
Digital signature vs electronic signature explained simply. Learn the difference, when each matters, and how OpenSign™ uses both for secure, legally binding signing.
Read guide →How to Create an Electronic Signature (3 Ways)
Learn how to create an electronic signature in three ways — draw, type or upload. A free, step-by-step guide to making a reusable eSignature with OpenSign™.
Read guide →OpenSign API Tutorial: Send Your First Signature Request
A developer tutorial for the OpenSign™ eSignature API: authenticate, create a document from a template, send a signature request and handle webhooks. Free and open source.
Read guide →eSignatures Around the World
Open-source eSignature resources in your language — including French and German guides to free, legally binding online signing.
Signature électronique open source et gratuite
OpenSign™ est une solution de signature électronique open source et gratuite. Signez vos documents PDF en ligne, avec une signature juridiquement valable et une piste d'audit.
Read guide →DocuSign kostenlose Alternative (Open Source)
OpenSign™ ist eine kostenlose Open-Source-Alternative zu DocuSign. Unterschreiben Sie unbegrenzt Dokumente online — rechtsgültig, mit Prüfprotokoll und selbst hostbar.
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