Sign PDF
Sign a PDF on Mac — Faster Than Preview
macOS Preview has built-in PDF signing — it's fine for one-page personal stuff but it nags you to use Continuity Camera, sometimes saves signatures in places you don't want, and has limited control over signature placement. Our browser-based signer works in Safari, Chrome, or Firefox on any Mac, lets you draw with the trackpad or upload a saved signature image, and outputs a clean PDF without macOS-specific metadata.
- Works in your browser — no install
- Files private and isolated to your workspace
- Free tier covers most everyday use
What you should know
Preview vs. our signer
Preview: built-in, fastest for a one-off signature on a one-page PDF you're emailing back. Our signer: better for multi-page contracts, multiple fields per page, sending to others for signature, or sharing a signed PDF that doesn't reveal you're on macOS.
Trackpad signatures work great
Modern Mac trackpads have high pressure sensitivity, so finger or stylus drawing produces a natural-looking signature. Apple Pencil + iPad mirroring (Sidecar) gives you the cleanest signature possible.
Continuity Camera for handwritten
If you have an iPhone nearby, you can sign on paper, snap a photo via macOS Continuity Camera, and use that image as a signature. Save it once, reuse it anywhere.
Privacy
Files are uploaded to your private workspace, encrypted in transit and at rest, auto-deleted on free plans after processing. We don't read or store your signature image beyond the active session.
Tips that actually help
- Use your trackpad if you don't have a stylus — modern Mac trackpads are great for drawing.
- If you sign documents often, draw your signature once, take a screenshot of just the signature region, and save it as 'signature.png'. Reuse that image — every signature looks identical.
- Keep a small library of signatures (initials, full name, business name) in a 'Signatures' folder for quick reuse.
- For multi-page contracts that need initials on every page, drop initials fields on each page in our editor.
Sign your PDF on Mac.
No install, no signup wall, no watermark on paid plans.
Frequently asked questions
Why not just use Preview?
For a one-off, Preview is fine. For multi-page contracts, multiple recipients, or reusable signatures across many documents, our tool is faster and gives you more control.
Does it work on older Macs?
Yes — works in any modern browser (Safari 15+, Chrome, Firefox) on macOS Mojave and later.
Can I use Apple Pencil on Mac?
Indirectly via Sidecar (mirror your Mac to iPad and use Pencil). Apple Pencil isn't natively supported on Mac trackpad/screen.
Is the signed PDF the same legal weight as a Preview signature?
Yes — both are standard electronic signatures under U.S. ESIGN Act. The signing tool doesn't affect legality.
Where does the signed PDF go?
Downloads folder by default. You can also save to iCloud Drive or any other location via the browser's save dialog.
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