CalConverters

Sign PDF

Drop a PDF, draw your signature or upload one, then drag it onto the page and download. Everything runs locally — nothing is ever uploaded.

Files never leave your device

Drop a PDF to sign, or click to browse

PDF

What This Tool Does

Sign PDF lets you add a visible signature image to a PDF by drawing with your mouse, uploading an image, or typing your name. Drop a PDF, place the signature where you want it on the chosen page, adjust the size, and download — without anything leaving your browser.

The signature is applied as a visible image layer. This is not a certified digital signature with cryptographic verification; it is purely for visual marking.

Tip: For legal, certified signatures with cryptographic verification, use a specialized e-signature service. This tool adds a visible image signature only.

Draw Your Signature or Upload an Image

Draw your signature directly using your mouse or trackpad on a canvas. Alternatively, upload a PNG or JPG image of your signature, or type your name in a signature-style font. Erase and redraw until it looks right.

Place on the Exact Page You Need

Click or tap the PDF page where you want the signature to appear. The signature is placed on that single page only — it does not repeat on other pages. Drag to reposition it, or resize using the handles.

A Visible Image Signature, Not a Digital Certificate

This tool creates a visual signature image embedded in the PDF. It is not a cryptographically certified or legally binding e-signature. If you need a tamper-evident, auditable signature, use a certified e-signature service.

Nothing You Drop In Ever Leaves Your Device

The preview is rendered in your browser and the signature is applied by a WebAssembly module loaded into the same tab. Your PDF is read, previewed, and rebuilt on your device with no upload step.

Related Tools

To overlay text or images, use Watermark PDF. To reorder or delete pages, try Organize PDF.

Frequently asked questions

Is this a certified or legal digital signature?
No. This tool adds a visible signature image to a PDF, but it is not a certified digital signature (PAdES) with cryptographic verification. For legally binding signatures, use a certified e-signature service. This is for visual signatures only.
Can I draw a signature or do I have to upload an image?
You can do either. Draw your signature directly on the page using your mouse or trackpad, or upload an image file (PNG, JPG) of your signature. You can also type your name in a signature font.
Where does the signature go?
Click or tap the page where you want to place the signature, then adjust its size and position as needed. The signature is placed on the specific page you click — it does not apply to all pages.
Is my PDF uploaded anywhere?
No. The preview is rendered locally in your browser and the signature is applied by a WebAssembly module loaded into the same tab. Your file is read and rebuilt entirely on your device — it is never sent to a server.