Plenty of people no longer keep a printer at home, and a working scanner is rarer still — yet documents keep arriving that assume both. You need neither. Below are the actual menu paths for macOS, iOS, Android and Windows, plus the cases nobody explains: fillable fields, scans that arrive as photos, signatures that come out as grey boxes, and the colleague who insists on wet ink.
The old loop
Download → find a printer → print → sign → find a scanner → scan → hope it's straight → email back
What actually happens now
Open the PDF → draw or place a stored signature → save → reply
Why the print-sign-scan loop is unnecessary
The legal groundwork was laid decades ago. In the US, the federal ESIGN Act (2000) and the Uniform Electronic Transactions Act (UETA, 1999 — adopted by nearly every state, with New York working from its own Electronic Signatures and Records Act instead) establish that a signature is not invalid merely because it is electronic. Article 25(1) of the EU's eIDAS Regulation — Regulation (EU) No 910/2014, since amended — says much the same. In the UK, section 7 of the Electronic Communications Act 2000 makes an electronic signature admissible in evidence, and the Law Commission's 2019 report on the electronic execution of documents concluded that an electronic signature is generally capable of executing a document where the signatory intends to authenticate it.
A rescanned page carries no extra legal weight — if anything it is worse evidence: lower resolution, skewed, often barely legible.
General information, not legal advice. Rules differ by country, state and document type, and they change. For a country-by-country breakdown and the commonly excluded categories, see our electronic signature laws guide.
Step zero: identify what kind of PDF you have
Most signing frustration comes from using the wrong tool for the file. Two quick tests: select a line of body text, then click where you would type an answer.
A flat PDF with no interactive fields
Text selects, but clicking the blank next to “Signature:” does nothing — the common case. Any method below works.
A PDF with real fillable form fields
Clicking a blank gives you a cursor or an outlined box. These are AcroForm fields (older government forms sometimes use XFA). Fill them in a reader that understands forms — Edge, Acrobat Reader, Chrome or Preview — rather than typing on top: the recipient may read the values directly, and a field widget renders above page content, so text underneath can be hidden.
A scanned page saved as a PDF
No text selects — the page is one image. Signing works fine; you are placing an image on an image. Run OCR only if you need to search the text.
A photo or JPEG that is not a PDF yet
Most signing tools, including this one, accept PDFs only. Convert it first — see below.
Method 1: any browser, any device
Useful on a machine you don't control, on Chromebook or Linux, or when you want one workflow everywhere. SimpleSignPDF parses and rebuilds the PDF inside the tab, so the document itself is never uploaded to a server. The page around it is an ordinary web page and loads the usual third-party scripts for fonts, analytics and ads — that is the site, not your file.
1Drop the PDF onto the page, or press “Try a sample document” to practise on something disposable.
2Click “New Signature”. Draw gives three pen weights and a colour picker; Type renders your name in one of four handwriting fonts; Upload strips the background from a photo of a signature.
3Drag it onto the signature line and pull the corner handles until the baseline matches the printed rule. Scroll to the right page first — placements land on the page in view.
4Add your printed name and the date with the quick-add buttons if needed.
5Click “Download Signed PDF”. The signature is written into the page content as a transparent PNG, not an annotation, so the recipient cannot drag or delete it.
The honest caveat: this tool draws on top of pages and does not fill interactive form fields — if your document is a real AcroForm, fill it elsewhere first. For a screen-by-screen walkthrough, see the step-by-step signing guide.
Ready to sign?
No login, no account, no software — done in under a minute.
Open the PDF, then View ▸ Show Markup Toolbar (Shift-Command-A) or click the pen-tip icon in the toolbar. The signature button looks like a scribbled squiggle; click it, then Create Signature. Three capture methods follow.
Trackpad
Click Click Here to Begin and write with one finger; press any key to stop, then Done. Go larger and slower than you would on paper.
Camera
Sign a white sheet in dark ink and hold it to the webcam so the signature sits on the blue guide line. Preview lifts the ink and discards the white — more natural than a trackpad, but very sensitive to lighting.
iPhone or iPad
The best of the three. Pick the device, sign with a finger or Apple Pencil on the surface that opens, and it lands on the Mac instantly.
Placing it and saving safely
Saved signatures reappear in the same popover and, with iCloud Keychain on, generally follow you to your other Macs. One habit worth forming: Preview edits in place through autosave, so use File ▸ Duplicate first or finish with File ▸ Export as PDF. Preview also has a long-standing reputation for rewriting PDFs in ways that can disturb form fields or invalidate an existing cryptographic signature — if yours has either, sign it elsewhere.
Method 3: iPhone and iPad — Markup in Files and Mail
From the Files app
Tap the PDF to open the preview, tap Markup (the pen tip in a circle, top right), tap + at the bottom right, choose Signature, then pick a stored one or add a new one. Drag, resize, tap Done. With an Apple Pencil you can skip the tool and write straight on the page.
Straight from a Mail attachment
Tap the attachment to preview it, tap the Markup icon, sign, tap Done, and iOS offers to send the marked-up copy as a reply. If your version doesn't show that, use the share icon to Save to Files and attach the copy yourself.
Method 4: Android
Android has no universal markup layer, so it depends on what is installed:
✓Google Drive: recent Android versions include an annotation mode with a pen tool when viewing a PDF, and can scan paper straight to PDF from the + button.
✓Adobe Acrobat Reader: open the PDF and look for Fill & Sign, which stores a reusable signature you tap to place.
✓Samsung Galaxy with an S Pen: Samsung Notes imports a PDF, lets you write on it, and exports back to PDF.
✓Chrome renders PDFs and fills interactive fields, but its markup tooling is thin and has changed between releases, so a browser-based signer is the dependable fallback on any device.
Labels move between app versions and manufacturer skins, so treat these as directions rather than coordinates.
Method 5: Windows — Edge and Acrobat Reader
Microsoft Edge's Draw tool
Windows has no dedicated PDF editor, but Edge is the default viewer and it can ink. Open the PDF and find Draw in the top toolbar — a pen icon, usually with a caret for colour and thickness. Draw the signature, then Ctrl-S. Two catches: Edge keeps no reusable signature, so you redraw it on every document, and a mouse-drawn signature looks like one. With a touchscreen or pen it is genuinely good.
Acrobat Reader's Fill & Sign
Acrobat Reader is free to download and, at the time of writing, includes Fill & Sign. In the current interface choose All tools ▸ Fill & sign; older builds put it under the Tools tab. Pick the sign icon, then Add signature, and choose Type, Draw or Image — Image expects a clean, high-contrast photo. Then File ▸ Save As. Acrobat handles fillable forms properly, its main advantage over the browser route. Adobe moves capabilities between free and paid tiers periodically, so check the current terms on its site.
Turning a photo or JPEG into a signable PDF
Straight conversion. On a Mac, select the images in Finder and use right-click Quick Actions ▸ Create PDF, or open one in Preview and choose File ▸ Export as PDF. On Windows, select them in File Explorer, right-click Print, and pick Microsoft Print to PDF. Fast, but it preserves every flaw of the photo.
Re-scan it instead. Every modern phone has a document scanner that corrects perspective, crops to the page edge and evens out lighting. On iPhone or iPad, open Files, tap More (⋯) and choose Scan Documents — the same feature sits behind the camera button in Notes. On Android, Google Drive scans to PDF from the + button.
Check the page size afterwards: a converted photo often produces an odd page shape that prints badly, whereas scanner modes output a standard A4 or Letter page.
Getting a clean, transparent signature from paper
Why photographed signatures come out grey
Background removal works on brightness: pixels brighter than a threshold become fully transparent, a narrow band just below it fades out, and everything darker is kept as ink. White paper in even light disappears cleanly; paper in shadow does not, because the shadow from your own hand or phone drops it into the “this must be ink” range — hence the grey rectangle. The opposite failure also happens: a pale ballpoint in bright light can read as background, leaving thin, broken strokes.
How to shoot one that cuts out cleanly
✓Plain unlined white paper — ruled lines survive the cut-out and end up in your signature.
✓A dark fine-liner, gel pen or marker rather than a ballpoint. Contrast is the whole game.
✓Sign much larger than the final size, filling half a sheet of A4. Downscaling hides wobble; upscaling reveals it.
✓Even, indirect daylight, with the camera square to the page and slightly back — leaning in puts your head between the light and the paper.
✓If it still looks grey, raise the exposure in your phone's photo editor, or re-shoot in document-scanner mode with the black-and-white filter.
For most people, drawing directly with a trackpad, touchscreen or stylus is cleaner and far less work — the photo route earns its effort mainly when the result must match a signature already on file somewhere.
Do you need to “print to PDF” after signing?
Usually not. When a tool writes the signature into the page content — as SimpleSignPDF does — the downloaded file is already final. There is no layer to collapse, and re-printing gains nothing.
When flattening is genuinely worth doing
▸The signature is an annotation. Ink from Edge's Draw tool and markup from Preview or iOS are annotation objects, which anyone with a capable editor can select and delete.
▸You filled a form and want the answers locked so nobody can edit or reset them.
▸An upload portal rejects the file — some government and HR portals refuse PDFs containing interactive fields, or silently discard the values.
▸Older viewers occasionally render annotations differently or omit them when printing.
How to flatten, and what it costs
The universal method is the print dialog: on Windows, Ctrl-P and Microsoft Print to PDF; on macOS, Command-P and PDF ▸ Save as PDF. Know the trade-off: a print pipeline typically discards interactive fields, links, bookmarks and metadata, and can degrade the accessibility tagging screen readers rely on. It is one-way, so keep the original. And to be blunt about a common misconception — flattening does not make a signature more binding or harder to forge, only harder to remove.
When someone insists on wet ink
Sometimes this is a legal requirement; sometimes it is internal policy nobody has revisited in a decade. Ask which: does it come from a statute, a regulator, or the organisation's own procedure?
Real restrictions exist. ESIGN does not extend its validity rule to wills, codicils and testamentary trusts, to matters of family law such as adoption and divorce, or to specified court documents and notices — utility shut-off, eviction, foreclosure and insurance cancellation among them. Being carved out of ESIGN is not itself a wet-ink mandate; it means the statute stands aside and other law decides. India's Information Technology Act 2000 recognises electronic signatures under section 3A, but its First Schedule excludes wills, powers of attorney, trusts and contracts for the sale of immovable property — and the regime centres on prescribed methods such as certificate-based digital signatures and Aadhaar eSign, so a drawn image may not qualify as a statutory electronic signature there. In England and Wales a deed signed by an individual must still be witnessed, and the Law Commission's 2019 report concluded that under the current law the witness has to be physically present.
If it really must be wet ink, you still don't need hardware: print at a library, copy shop or coworking space, sign with a pen, then use your phone's scanner mode for a clean, deskewed PDF. One printer visit, not a purchase. The landlord-and-tenant version of this comes up often — see our guide on signing a rental agreement.
Open PDF ▸ annotate / pen tool (version dependent)
Android
Acrobat Reader
Open PDF ▸ Fill & Sign ▸ Signature
Windows
Microsoft Edge
Open PDF ▸ Draw ▸ sign ▸ Ctrl-S
Windows / macOS
Acrobat Reader
All tools ▸ Fill & sign ▸ Add signature
Any browser
SimpleSignPDF
Drop PDF ▸ New Signature ▸ place ▸ Download
What this tool cannot do
A signature added here is a simple electronic signature — in eIDAS terms a plain “electronic signature”, the basic tier beneath an advanced (AdES) and a qualified (QES) signature. Concretely:
→No identity verification — nothing confirms the person who drew the signature is you. The same is true of a scanned handwritten signature, but worth stating.
→No audit trail or completion certificate: no timestamp record and no IP log tied to the signing, because the document never leaves your browser.
→No cryptographic seal, so a later modification would not be detectable from the file itself.
→No send-for-signature workflow. You sign your copy and email it onward yourself.
For everyday agreements — offers, leases, NDAs, freelance contracts — that is normally enough. Where a dispute is foreseeable or a regulator requires an audit trail, use a platform built for it; the comparison with paid e-signature platforms sets out where the line falls.
Ready to sign?
No login, no account, no software — done in under a minute.
In most everyday situations, yes. ESIGN and UETA in the US and Article 25(1) of eIDAS in the EU provide that a signature is not invalid merely because it is electronic; in the UK, section 7 of the Electronic Communications Act 2000 makes electronic signatures admissible in evidence and the Law Commission concluded in 2019 that they can generally be used to execute documents. Specific categories are excluded or treated differently in each jurisdiction — wills and certain family-law and property documents are common examples — so check your own case. General information, not legal advice.
Does re-scanning a printed signature make it more binding?
No. A scan of a hand-signed page and an on-screen signature are both simple electronic signatures once inside a PDF. Neither carries a certificate or audit trail, and the scan is usually the lower-quality of the two.
Why does my photographed signature have a grey box around it?
Background removal keys on brightness, so paper in shadow is dark enough to be kept as ink. Re-shoot in even indirect daylight with the camera square to the page, or raise the exposure first. A phone document-scanner mode with the black-and-white filter is the most reliable fix.
Can I send a document to someone else for their signature?
Not with this tool. SimpleSignPDF signs documents you already have; there is no send-for-signature workflow, recipient tracking or audit trail. Sign your copy, email it on, and let the other party countersign with whatever they prefer.