Mac users have Preview for basic signatures, but it lacks flexibility for professional document signing. Here's how to sign a PDF on Mac for free in your browser — with more control over placement, size, and signature style than Preview offers.
Go to pdfeditor.onl/sign-pdf. The tool loads instantly in any modern macOS browser — no installation, no Adobe Acrobat required.
Drag the PDF from Finder directly into the browser window, or click the upload area to browse.
Tip: You can drag a PDF file from Finder directly onto the browser tab as a shortcut — works in Safari, Chrome, and Firefox on Mac.
Draw your signature with the mouse or trackpad, type it in a handwriting font, or upload a PNG of your physical signature. Drag to position on the page and resize using corner handles.
Click Download Signed PDF. The signature is permanently embedded. The file saves to your Downloads folder.
Preview on Mac limits you to one signature stored in iCloud. pdfeditor.onl lets you draw, type, or upload a signature, place it precisely, resize freely, and add multiple signatures across pages — all without iCloud or an Apple ID.
Yes. The tool runs natively in Safari and Chrome on all Apple Silicon Macs with no compatibility issues.
Yes. An electronic signature created in any browser on Mac has the same legal standing as one created in a desktop application.