Sign PDF Online —
Free & Private
Upload a PDF and your signature image to stamp it onto the document. Everything runs entirely inside your browser.
100% FREE · NO UPLOAD · SAFE & SECURE
1. Select PDF Document
Click to upload PDF
2. Select Signature Image
Click to upload Signature (PNG/JPG)
The signature will be placed at the bottom-right of the last page.
Tip: Upload a PNG with a transparent background for best results.
How to Sign PDF Documents Online Free
In today's digital workflow, knowing how to sign a document online quickly and securely is essential. Our platform provides a completely free and seamless experience to sign PDF online without needing to install heavy software. Whether you need to sign documents online free for a school form, a business letter, or a personal application, our tool is built to handle it instantly.
Why Use Our Online PDF Signer?
Many services charge monthly fees just to add your signature to a file. We built this online PDF signer to be universally accessible. You can upload any standard document and apply your online signature PDF stamp without limits. The process is straightforward, meaning you can sign PDF documents in a matter of seconds directly from your browser.
Maximum Privacy: Your Files Never Leave Your Device
When dealing with your private documents, security is your top priority. When you sign pdf online free using iFixImg, your files are never uploaded to our servers. Our tool utilizes modern WebAssembly technology to parse and merge your signature entirely within your computer's local memory. You get the convenience of a web tool with the security of an offline desktop app.
How to sign a document online:
- Select your file: Upload the PDF you need to sign.
- Add your signature: Upload a photo or a transparent PNG of your actual signature.
- Apply and Download: The tool merges the image onto your document, generating a legally valid, signed PDF file for you to download instantly.
Frequently Asked Questions
Everything you need to know about our online signature tool.
Can I use a photo of my signature?
Yes! Simply write your signature on a blank white piece of paper, take a clear photo of it, and upload it to our tool. It works perfectly.
Is this tool completely free?
Yes, our online PDF signer is 100% free. There are no daily limits, no premium tiers, and no watermarks.
Does this work on mobile phones?
Absolutely. Since the tool runs in the browser, you can easily use it on your iPhone, iPad, or Android device to sign documents on the go.