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Sign PDF

Sign PDF documents electronically by drawing, typing, or uploading your signature. Place your signature precisely where needed. No account required — completely free and private.

100% Private — files never leave your browser
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Drop a PDF file to sign

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Select Files

Your files stay on your device — 100% private

PDF, APPLICATION/PDF

How it works

Upload your file

Drag & drop or click to select. Files stay on your device — nothing is uploaded.

Adjust settings

Configure options and preview before processing.

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Get your file instantly. No signup, no email required.

Frequently Asked Questions

One23PDF offers three ways to create your signature: draw it using your mouse or touchscreen, type your name and choose a signature style, or upload an image of your handwritten signature. All methods produce a clean, professional result.
One23PDF provides a simple electronic signature tool for everyday use. While e-signatures are legally recognized in many jurisdictions, for contracts requiring certified digital signatures, you may need a dedicated e-signature service with identity verification.
Yes. You can position your signature precisely on any page of the PDF. Simply navigate to the desired page, then click or drag to place and resize your signature exactly where it needs to go.
No. Your signature is created and applied entirely in your browser. It is never uploaded to or stored on any server. Once you close the tab, the signature data is gone — only the signed PDF you download is kept.

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What Is PDF Electronic Signing?

PDF electronic signing lets you add your signature to a PDF document digitally — either by drawing it with your mouse or trackpad, typing your name in a signature font, or uploading an image of your handwritten signature. This eliminates the need to print, sign by hand, scan, and re-send documents.

Electronic signatures are legally recognized in most jurisdictions worldwide, including under the U.S. ESIGN Act and EU eIDAS regulation. They're used daily for contracts, approvals, consent forms, and countless other business and personal documents.

One23PDF's signing tool lets you create your signature, position it precisely on any page, resize it, and save the signed document — all within your browser. Your documents and signature data never leave your device, providing a level of privacy that cloud-based signing services simply cannot match. It's 100% free with no credit card required.

Benefits of Signing PDFs with One23PDF

Legally Recognized

Electronic signatures created with One23PDF are legally valid under major e-signature laws worldwide. Sign contracts, agreements, and forms with confidence.

Draw or Type Signatures

Create your signature by drawing freehand, typing your name in elegant script fonts, or uploading a scanned signature image. Choose the method that works best for you.

Multiple Signatures

Place multiple signatures and initials throughout a document. Sign on different pages, add dates, and include additional text annotations alongside your signature.

Maximum Privacy

Unlike cloud signing services, One23PDF processes everything in your browser. Your signature and documents are never uploaded to any server — ideal for sensitive contracts and agreements.

How to Sign PDFs with One23PDF

  1. 1

    Upload Your PDF

    Drag and drop the document you need to sign or click to browse your files. One23PDF displays the full document so you can find the right signing location.

  2. 2

    Create & Place Signature

    Draw your signature with your mouse or trackpad, type it in a signature font, or upload a signature image. Drag it to the correct position and resize as needed.

  3. 3

    Download Signed PDF

    Click save and download your signed document. The signature is permanently embedded in the PDF and visible in every PDF viewer.

Common Use Cases for PDF Signing

  • Signing contracts and business agreements remotely
  • Approving invoices and purchase orders
  • Signing school permission forms and consent documents
  • Employee onboarding paperwork and HR forms
  • Real estate documents like leases and closing papers
  • Personal documents like tax forms and applications

One23PDF vs. Other PDF Signing Tools

Cloud-based signing services like DocuSign, Adobe Sign, and HelloSign charge per signature or require monthly subscriptions starting at $10–$25/month. They also upload your documents to their servers, creating potential privacy and compliance concerns for sensitive agreements.

One23PDF provides free, unlimited electronic signing with no account required. Your documents and signature data stay entirely in your browser — nothing is uploaded to any server. This makes One23PDF ideal for signing confidential contracts, legal documents, and personal forms without third-party access.

While cloud signing services offer additional features like signature tracking and multi-party workflows, many users simply need to add their signature to a document and send it. For this common use case, One23PDF delivers a faster, more private, and free to use solution.