How-to
How to sign anything.
Step by step: sign a PDF on any device or in your inbox, and get everyday documents signed online. Free methods first.
Devices
- How to sign a PDF on your iPhoneSign a PDF on iPhone with the built-in Markup tool in under a minute, and what to use when someone else has to sign or you need proof of who signed.
- How to sign a PDF on a Mac with PreviewSign a PDF on your Mac with Preview, using your trackpad, camera or iPhone. Step by step, plus what to use when other people need to sign or you need a record.
- How to sign a PDF on Android, freeSign a PDF on an Android phone with Adobe Acrobat Reader or the Google Drive app, step by step, and what to use when someone else needs to sign the document.
- How to sign a PDF on Windows, freeSign a PDF on a Windows PC with Microsoft Edge or free Adobe Acrobat Reader, step by step, plus when you need a real e-signature with an audit trail instead.
- How to sign a PDF in Gmail (and send it back)Gmail has no signing button, so here's the honest workaround on a computer and on a phone, plus how to send documents for signature without attachments at all.
- How to sign a PDF in Google DriveWhat Google Drive can and can't do with PDF signatures: Workspace eSignature, the Android annotate pen, and what to use with a free Google account.
- How to sign a PDF attachment in OutlookOutlook can't sign attachments itself. The quick workaround on Windows and Mac, what Microsoft 365 eSignature offers businesses, and a simpler way to send.
Documents
- How to sign a W-9 online, and what the IRS allowsThe IRS accepts electronically signed W-9s when the requester's system meets its rules. What those rules are, when a W-9 needs a signature, and how to sign one.
- How to sign an NDA online in minutesNDAs are among the easiest contracts to e-sign. What a solid NDA includes, two federal rules to know, and how to send one for signature from any device.
- How to sign a lease online, for landlords and tenantsMost leases can be e-signed, but state rules and some notices differ. How to set up a lease so every tenant, co-signer and landlord signs from their phone.
- How to sign a bill of sale onlineA bill of sale can usually be e-signed, but vehicle titles and DMV forms often need ink or a notary. What to include, what to check, and how to get it signed.
- How to get an invoice signed onlineMost invoices don't need a signature, but a signed one proves the customer accepted the work and the amount. When to ask for one and how to collect it fast.
- How to send and sign an offer letter onlineGet a job offer signed in minutes from any phone. What an offer letter should cover, why Form I-9 is different, and how to set a deadline and send it.