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Sign PDF Online – Add Signature to PDF Free | ZeroKB

Sign PDF Online

Add your signature to a PDF by drawing, typing, or uploading an image. Move, resize and rotate it, then download the signed document.

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Upload Your PDF

Place Your Signature

Drag the signature to move it. Drag the blue corner icon to rotate and the red corner icon to resize.

Your Signed PDF

Download Signed PDF
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How to Sign a PDF

1. Upload PDF

Choose the document that needs your signature.

2. Create Signature

Draw, type, or upload a signature image.

3. Position and Rotate

Move it into place, resize it, and adjust its angle.

4. Download

Create and download your signed PDF copy.

Related PDF Tools

The Simple Guide to Signing PDF Documents

Need to sign a document without printing it? ZeroKB Sign PDF helps you add a visible signature to a PDF in a few simple steps. Draw your signature, type your name, or upload a signature image, then position it on the page and download a signed copy.

Choose how to create your signature

Pick the method that feels easiest. Drawing works well with a mouse, touchscreen, or stylus, and you can change the ink colour and stroke thickness. If you already have a signature image, upload a PNG, JPG, or WEBP file. A clear image with a transparent background usually blends neatly into the document. You can also type your name to create a quick text-style signature. Check the preview before placing it so you know how it will look on the page.

Position, resize, and rotate it

After adding the signature, drag it to the correct signature line or approval area. Use the red corner handle to adjust its size and the blue circular handle to rotate it. The selection outline turns with the signature to make its angle easier to see. Keep the signature clear of dates, instructions, printed text, and other signatures. For a formal document, compare the placement with the instructions provided by the person or organization that sent it.

Sign multiple pages when needed

Use the page selector to move between PDF pages. Add a signature to each page that needs one, and adjust each placement separately. If you add a signature by mistake, select it and remove it before creating the final file. This is useful for forms that ask for initials on several pages or have separate approval fields. Review every page before downloading so you do not miss a required signature area.

Review the finished PDF

Choose Create Signed PDF to generate your document, then inspect the preview. Confirm that the signature is on the intended page and appears at the right size and angle. If you need to make a correction, adjust the placement and create the PDF again. Keep your original file too, so you still have an unsigned copy for your records.

Understand what this signature means

This tool places a visual signature on a PDF. It does not create a certificate-based digital signature, verify a person’s identity, or provide a legal review. Some organizations require a specific electronic-signature service or signing method, so check their requirements before submitting important paperwork. Treat signature images and personal documents as sensitive files, especially when using a shared device.

Prepare and organize your document

Before signing, check that the document is complete and that its names, dates, and terms are correct. If you need to combine files first, use Merge PDF. To extract only the pages you need, try Split PDF. Once the signed copy is ready, download it and store it in a safe place. A careful final review can help prevent sending an incomplete document or signing the wrong page.

Sign PDF FAQs

Upload your PDF, draw, type, or upload a signature, position it on a page, then create and download the signed copy.
Select the signature and drag the blue circular icon at its upper-right corner. The signature and its dotted outline rotate together.
Select the signature and drag its red lower-right corner handle. The proportions are preserved while resizing.
Yes. Use the page selector to visit other pages and add signatures where needed.
No. This tool places a visual signature image on the PDF. It does not create a certificate-based digital signature.