Sign documents on your phone in under a minute.
Most people get a signing request on their phone — then bounce off a tool clearly designed for a 27-inch monitor. sign.pink is mobile-first from the first tap, so the document that lands in your hand is the document you can actually sign in your hand.
Why desktop tools die on mobile
Here's the awkward truth the old guard won't say out loud: a huge share of signing requests are opened on a phone, and a huge share of those get abandoned. The document is a fixed-width desktop PDF crammed onto a small screen, the signature box is a pinprick you have to zoom into, and after three frustrated taps people decide they'll "do it later on the computer." Later rarely comes.
That abandoned tab is a deal sitting in limbo — a lease unsigned, an offer letter unaccepted, an invoice unapproved. The fix isn't nagging your signer. It's building the signing experience for the device that's actually in their hand.
How sign.pink handles it
We render documents to fit the screen they're on, size every field for a thumb, and walk people through in order so they never wonder what's left. The signature itself is a single tap. The result is a flow that feels native to a phone instead of tolerated on one.
Sign in four taps
Tap the link
Open the link from your text or email. The document loads in your browser — no app to download, no account to create.
Tap to sign
Tap the highlighted signature field, draw with your finger or pick a typed style, and it drops right in. No pinching, no hunting.
Thumb-fill the rest
Dates, initials, checkboxes, and text all snap to thumb-sized targets, so you can fill a whole form one-handed at a bus stop.
Finish anywhere
Hit done and everyone gets the final PDF. The whole thing takes under a minute, start to finish.
Built for the phone, not patched for it
Thumb-first targets
Fields are sized and spaced for fingers, not a mouse pointer. You won't fat-finger the wrong box.
No pinch-and-pray
The document reflows to your screen, so you read what you're signing without zooming into the fine print one paragraph at a time.
Under 60 seconds
We guide you field to field in order. Most people finish a typical signing in well under a minute.
Forgiving on flaky signal
Your progress is saved as you go, so a dropped bar of LTE in a parking garage doesn't make you start over.
No friction for senders either
Send from your phone too. Snap a photo of a paper form or pick a PDF, place fields, and send — all from the device in your pocket.
Everything stays unlimited
Mobile signing isn't a premium add-on. It's the same $3/month plan, with no envelope caps and no per-device nonsense.
Mobile signing FAQ
No. sign.pink runs in your phone's browser. You tap the link, the document opens, and you sign — there's nothing to download from the App Store or Play Store.
Sign from your phone for $3/month — or free.
No credit card to start. No envelope limits. No surprises.