Sign PDF
Add signatures directly to your PDF documents without printing or scanning. Draw by hand, type with styled handwriting fonts, or upload a signature image, then position and resize it anywhere on your pages.
Your files never leave your device. All processing happens locally in your browser with no file uploads or account required.
How to sign a PDF
- 01
Select PDF file
Choose the PDF document you want to sign from your computer or phone.
- 02
Add your signature
Draw your signature, type your name with a handwriting font, or upload an image, then position and resize it on any page.
- 03
Download signed PDF
Apply your signature directly to the document and download the signed PDF to your device.
Important details & limitations
Signatures are visual marks, not certificate-based digital signatures. Add multiple signatures, then drag and resize them on any page.
Sign PDF files online for free
PDFira lets you add a visible signature to supported PDF documents directly in your browser. Whether you need to sign an agreement, approve an invoice, or complete an official form, you can create your signature by drawing freehand, typing your name in styled cursive handwriting, or uploading an existing signature image. You can then navigate through your document, drag the signature to the exact position needed, and resize it to fit the page.
Signatures added with PDFira are visual electronic marks embedded into the PDF content stream. This tool does not create certificate-based cryptographic digital signatures (PKI), and does not provide signer identity verification, digital certificates, timestamps, or audit trails. Because electronic signature requirements vary across jurisdictions and document categories, PDFira does not make guarantees regarding the legal validity or enforceability of signed documents.
Why add a signature to a PDF?
Sign documents quickly
Add your signature to supported PDF documents without printing and scanning them.
Complete forms and agreements
Place a visible signature on documents that require a signature field or approval.
Keep a digital workflow
Sign and save a PDF without moving between paper and digital copies.
Prepare documents for sharing
Create a signed copy that can be downloaded and sent using your preferred sharing method.
Private PDF signing in your browser
PDFira performs supported PDF signing operations locally on your device. Your selected document and signature do not need to be uploaded to a PDFira processing server. Processing uses your browser and device resources.
Frequently asked questions
How do I sign a PDF with PDFira?+
Choose a PDF file, create your signature by drawing, typing, or uploading an image, place and resize it on your desired page, then click Save signed PDF to download your updated document.
Is PDFira's Sign PDF tool free?+
Yes. PDFira's Sign PDF tool is free to use and does not require an account or subscription.
Are my PDF and signature uploaded?+
No. PDFira processes your document and signature locally in your browser. Neither your PDF nor your signature image is ever uploaded to a remote server.
Can I draw or upload my signature?+
Yes. You can draw your signature using a mouse, stylus, or touchscreen, upload a PNG, JPG, or WebP signature image, or type your name using one of three styled handwriting fonts.
Can I choose where my signature appears?+
Yes. You can navigate to any page in your document, drag the signature anywhere on the page, and adjust its size using the bounding box handles.
Is this the same as a certificate-based digital signature?+
No. PDFira creates a visual electronic signature by embedding your signature image onto the document. It does not generate cryptographic PKI signatures, digital certificates, timestamps, or audit trails.
Is a signature added with PDFira legally binding?+
Requirements for electronic signatures vary by country, document type, and situation. PDFira provides visual signing functionality but does not verify signer identity or guarantee that a signature meets a particular legal or regulatory requirement.
Do I need to install software?+
No. PDFira runs directly in modern web browsers on desktop computers, tablets, and phones without installing desktop software or mobile apps.