I love reading free novels online, and signing PDFs is a handy skill to have. One of the easiest ways to sign a PDF for free is by using online tools like 'Smallpdf' or 'PDFescape'. These platforms let you upload your PDF, add your signature with a mouse or touchpad, and save it without any cost. I use these tools often because they’re straightforward and don’t require any downloads. Another method is using 'DocuSign', which has a free tier for basic signing needs. Just upload your novel’s PDF, drag and drop your signature, and you’re done. For those who prefer mobile apps, 'Adobe Acrobat Reader' allows free signing on the go. I’ve signed many PDFs this way, and it’s perfect for quick edits. Always make sure the site is secure before uploading sensitive documents, though—safety first!