How it works
Open Annotate mode and choose Signature.
Draw your signature in the browser.
Place, resize, and move the signature on the page.
Download the PDF to flatten the signature into the file.
Related tools
Add text · Draw on PDFs · Add images · Protect with password
Privacy-first
Your signature is created and placed locally. No upload is required, and after CrabPDF is loaded you can turn off Wi-Fi and keep working.