Print, sign, scan, upload — that used to be the only way to put a signature on a PDF. It doesn't have to be anymore. This guide covers exactly how to sign any PDF from your browser in under a minute, the difference between a placed signature image and a certified digital signature, and what to know before you rely on either one for something important. Whether you're signing a single form or handling contracts as a regular part of your work, the same basic flow applies either way.
How online signing actually works
When you draw or type a signature, the tool captures it as a small image — either a freehand path traced by your cursor or finger, or text rendered in a script-style font. That image is then placed onto the existing PDF page as an overlay at the position and size you choose, without touching or re-rendering the rest of the document's content. This is why the process is nearly instant even on a large multi-page PDF: only a small image is being added, not the entire document being rebuilt.
This also explains a detail worth knowing: a placed signature is visually part of the page from that point forward, but it isn't cryptographically linked to your identity the way a certified digital signature is. For the overwhelming majority of everyday paperwork this distinction doesn't matter, but it's the reason certain legal and financial institutions specifically ask for a certified signature service rather than accepting any visually signed PDF.
| Who | Typical signing scenario |
|---|---|
| Freelancers | Signing client contracts and service agreements sent as PDF attachments |
| Tenants & landlords | Signing rental agreements without needing to meet in person |
| Job seekers | Signing offer letters and acceptance forms quickly to meet a deadline |
| Small business owners | Signing invoices, quotations, and vendor agreements on the go |
| Students | Signing consent forms, internship agreements, and declaration pages |
Why print-sign-scan is disappearing
Signing a document used to mean finding a printer, signing with a pen, scanning it back in, and hoping the file size was small enough to email. Every step in that chain is a place things go wrong — a jammed printer, a scanner that isn't calibrated, a scanned PDF that's suddenly 20 MB because the scanner defaulted to a high-resolution color setting. Online signing tools skip all of it: your signature is captured digitally and placed directly onto the existing PDF, so the document never has to leave your browser as a physical piece of paper at any point in the process.
This matters more than it might seem for anyone signing documents regularly — freelancers sending signed contracts to multiple clients a week, HR staff processing offer letters, or tenants and landlords exchanging rental agreements. Removing the print-scan step doesn't just save time on any single document; it removes an entire category of recurring friction.
Two ways to create your signature
Most online signing tools give you two options, and which one you use depends on the situation:
Where to place your signature
Once your signature is created, you choose where it goes on the page and how many pages get it:
| Option | When to use it |
|---|---|
| Bottom-right / bottom-left | Standard for most letters, forms, and agreements |
| Top of the page | Documents that need a signature as an acknowledgment header |
| All pages | Multi-page contracts that require initials on every page |
| Just the last page | Long documents where only the final page needs a full signature |
| Center of the page | Certificates or single-purpose documents built around one signature block |
Is it legally valid?
For everyday paperwork — internal forms, letters, acknowledgment slips, informal agreements — a visually placed signature image is widely accepted. For contracts or documents that legally require a certified digital signature (with cryptographic verification tied to your identity), check the e-signature rules in your country, since some formal legal documents specifically require that stronger standard rather than a placed signature image.
The practical distinction: a placed signature is visually identical to a scanned pen signature and works the same way legally in most everyday contexts. A certified digital signature is a different technology entirely — it embeds a cryptographic proof tied to a verified identity and flags if the document is altered afterward, which is why some government filings, notarized documents, and high-value contracts specifically require it by name.
A useful rule of thumb: if a document would have been acceptable with a scanned pen-and-paper signature before online signing tools existed, a placed digital signature is very likely acceptable too, since it's functionally the same visual mark. If a document explicitly asks for a "digital signature certificate," "DSC," or similar certified format by name, that's the signal to use a dedicated certified signing service instead of a general PDF signing tool.
Signature etiquette worth knowing
- Match the name on the document — a signature under a different name than the one printed on the form can raise questions during verification, even if it's your usual signature style.
- Keep it consistent across related documents — if you're signing multiple pages of the same agreement, using the same signature style (drawn or typed, same size) looks more coherent than switching between the two.
- Avoid placing a signature over existing text — position it in blank space near the intended line so nothing underneath becomes unreadable.
Step-by-step: sign a PDF online
- Open the Sign PDF tool on EkZapp.
- Upload the PDF you need to sign.
- Draw your signature with your mouse or finger, or switch to "Type" and type your name.
- Choose which page(s) to sign and where the signature should sit, then adjust the size.
- Click "Sign PDF" — your signed file downloads automatically.
Signing on mobile vs. desktop
Signing works well on both, with one meaningful difference in how the signature itself gets drawn:
- On mobile — drawing with a finger on a touchscreen produces a natural, varied signature close to a pen signature, since a finger has more freedom of movement than a mouse.
- On desktop — a mouse tends to produce a choppier drawn line, so typing the signature in a cursive font is often the cleaner-looking option unless you have a graphics tablet.
Either way, the upload, placement, and download steps are identical — there's no feature that's mobile-only or desktop-only.
Mistakes to avoid
- Signing before reviewing the full document — always scroll through every page first; a signature is much easier to add than to retract once a document has been shared.
- Sizing the signature too large — a signature scaled to fill most of a small form line looks unprofessional; keep it proportional to the space it's signing.
- Using a placed signature where a certified one is required — for notarized documents, some government forms, and formal legal contracts, check first whether your jurisdiction requires a certified digital signature rather than a placed image.
- Forgetting to sign every required page — multi-page contracts often need initials on each page in addition to a full signature at the end; check the document's own instructions before assuming one signature covers everything.
Frequently asked questions
Do I need to print and scan the PDF to sign it?
No. You can draw your signature directly with your mouse or finger, or type your name in a signature-style font, and place it straight onto the PDF — no printer or scanner needed.
Is an online signature on a PDF legally valid?
A visually placed signature image is accepted for many everyday documents like forms, letters, and internal approvals. For contracts requiring certified digital signatures with cryptographic verification, check your country's e-signature laws, as some formal legal documents require a certified digital signature service.
Can I sign every page of a multi-page PDF at once?
Yes. Most online signing tools let you choose to apply your signature to just the first page, just the last page, or every page in the document in a single pass.
Will my signature look the same every time?
If you draw your signature, it will vary slightly each time just like a pen signature does. If you type your name using a signature-style font, it will look identical every time you use it.
Can I resize my signature after placing it?
Yes. Before finalizing, you can typically adjust the signature's width as a percentage of the page, so it fits proportionally whether the document is a small form or a full-page letter.
What's the difference between a drawn signature and a certified digital signature?
A drawn or typed signature is a visual image placed onto the PDF, similar to a scanned pen signature. A certified digital signature uses cryptography tied to a verified identity and includes tamper-evidence, which some legal and government documents specifically require.
Can I sign a PDF from my phone?
Yes. Drawing a signature with a finger on a touchscreen works well, and the rest of the signing flow — uploading the PDF, choosing placement, downloading the result — is identical to using a desktop browser.
Does signing a PDF online store my signature anywhere?
A signature drawn or typed for one document is generally used only for that session's signing and isn't saved to a stored account or profile, unless the tool explicitly offers a signature-saving feature.
Quick recap
Signing a PDF online replaces the print-sign-scan chain with three quick steps: draw or type your signature, choose where it goes, and download the signed file. Drawn signatures look more natural but work best on touchscreens; typed signatures are cleaner on a trackpad or mouse. For everyday paperwork, a placed signature image is widely accepted — just check your jurisdiction's rules before using one on a document that specifically calls for a certified digital signature. If you sign documents often, the Signature Generator lets you create a reusable signature once instead of redrawing it every time — useful for freelancers and small business owners who sign several documents in a typical week rather than a one-off form.