Frequently Asked Questions: Sign PDF

Signing a PDF with BlendPDF takes about a minute, and you never need to print anything.

Upload the Document
Click "Choose File" or drag your PDF onto the upload area (Google Drive import is also available). The file can be up to 50MB, and a live preview shows the page you are about to sign.

Choose Your Signature
Pick one of two signature types. A text signature types your name onto the page in a clean font with a signature line above it, fast and tidy. An image signature places a picture of your real handwritten signature: upload a PNG or JPEG (up to 5MB), ideally a PNG with a transparent background.

Place It and Sign
Select the page number and one of five positions: bottom-left, bottom-right, top-left, top-right, or center. Bottom-right is the traditional signature spot for most Western documents. The preview shows exactly where the signature will land. Click sign, and the signature is embedded into the page itself, it becomes part of the document, not a floating annotation someone can delete with one click.

Download
The signed file downloads with "_signed" added to the name. Your original file stays untouched on your device, so you can always start over.

For many everyday documents, yes; for high-stakes ones, you should use more. Here is the honest picture rather than a one-word answer.

What the Law Generally Says
Most major jurisdictions recognize simple electronic signatures. In the United States, the ESIGN Act and UETA give electronic signatures the same legal effect as ink for most transactions. In the EU, the eIDAS regulation explicitly says a signature cannot be denied legal effect solely because it is electronic. Similar laws exist in the UK, Canada, Australia, and many other countries. A typed name or an image of your signature, placed with intent to sign, is a "simple electronic signature" under these frameworks.

Where It Is Typically Fine
Routine business and personal documents: internal approvals, quotes and invoices, permission slips, freelance agreements, rental applications, sign-off forms, and documents where the other party asked you to "sign and send back". In practice, most of these are signed exactly this way every day.

Where You Should Use More
Some documents carry formal requirements, wills, deeds, notarized documents, certain court filings, and some jurisdictions require "qualified" or certificate-based signatures for specific transactions. And because a BlendPDF signature has no identity verification or audit trail, it proves little about who signed if a dispute arises. For contracts with significant money or legal exposure, use a certificate-based signing service, and when in doubt, consult a legal professional in your jurisdiction. We would rather tell you that plainly than oversell a simple tool.

A visual signature. The distinction matters, and plenty of tools blur it, so here is exactly what BlendPDF does and does not do.

What BlendPDF Does
It draws your signature, typed text or an image, directly into the page content of the PDF. The result looks the same as a document you signed on paper and scanned: the signature is visibly there, embedded in the file.

What It Does Not Do
It does not apply a cryptographic (PKI) digital signature. There is no digital certificate tied to your identity, no tamper-evident seal that invalidates if the document is edited afterward, no timestamp authority, and no green check mark or signature panel in Adobe Reader. The document also remains editable after signing, nothing locks it.

Which One Do You Need?
If the other party expects a signature they can see, which covers most routine paperwork, a visual signature is exactly right, and it is what print-sign-scan produces too. If you need to prove cryptographically who signed and that nothing changed since, that requires certificate-based signing from a dedicated provider or an ID-linked national signature scheme. We say this plainly because a signature tool you trust should be honest about what its signatures are.

Both are embedded into the page the same way; they differ in how they look and what they need from you.

Text Signatures
You type your name and BlendPDF draws it on the page in a clean, standard font. It takes ten seconds and needs no preparation. The result reads as a formal typed signature, appropriate for approvals, acknowledgments, and forms where legibility matters more than a handwritten look. Typed signatures work in any script — Arabic, Hebrew, Chinese, and more (see the Arabic question below).

Image Signatures
You upload a picture of your actual handwritten signature as a PNG or JPEG (up to 5MB), and it is placed on the page at a sensible size. This looks like a real ink signature, which many recipients expect, especially on contracts and official-looking forms. It requires a one-time setup: capturing a good image of your signature, which the next question covers. Once you have the image saved, image signing is as fast as text signing.

Which to Choose
If the document just needs your name and assent, text is quickest. If the recipient expects to see "a signature", or the document has a signature line meant for handwriting, use an image.

Five minutes of setup gives you a signature image you can reuse forever.

Capture
Sign your name with a dark pen (black or blue gel pens work best) on plain white paper, larger than you normally would, big signatures downscale cleanly, small ones enlarge badly. Photograph it from directly above in good, even light, or scan it. Avoid shadows across the signature.

Crop and Clean
Crop the image tightly around the signature so it does not import with acres of white space. If your phone or an image editor offers background removal, use it to make the background transparent and export as PNG, a transparent PNG lets the document show through around the pen strokes, which looks like real ink on the page. A JPEG works too, but it will carry a white rectangle behind the signature, visible if the page area under it is not white.

Format and Size
Save as PNG (preferred, supports transparency) or JPEG, under 5MB, which is generous, a cropped signature photo is typically well under 1MB. Keep the file somewhere handy; you can reuse the same image for every document you sign from now on.

You choose both the page and the placement, and a live preview shows the result before anything is committed.

The Five Positions
Bottom-left, bottom-right, top-left, top-right, and center. Each places the signature a comfortable margin in from the page edges. Bottom-right is the conventional spot for signatures on most contracts and letters; bottom-left is common on forms with a witness or second-party line on the right; center suits approval stamps and title pages.

Choosing the Page
Enter the page number where the signature belongs, contracts usually want the last page, forms often the first. The preview updates so you can confirm you are signing the right page of, say, a 40-page agreement before processing.

Current Limitation
Placement is preset-based rather than freely draggable, so you cannot yet drop the signature onto an exact pixel, for example, precisely on a form's signature line in the middle of the page. For most documents the presets land where signatures belong; when a form demands exact placement, choose the nearest preset and check the preview, or sign the traditional bottom-right and initial the form line if needed.

One page per pass, but multiple passes work fine and take seconds each.

The Multi-Page Workflow
Sign the first page you need and download the result. Then upload that signed file back into the tool, choose the next page, and sign again. Every pass preserves the signatures already placed, because each signature is embedded permanently into its page. Initialing every page of a 10-page contract means ten quick passes, workable, though admittedly not elegant.

Same Spot, Different Pages
Since positions are presets, placing your initials at, say, bottom-left of each page produces perfectly consistent placement across the document, something that is actually harder to achieve signing by hand.

If You Sign Many Long Documents
For heavy multi-page signing workflows (every-page initialing on long contracts, daily), a desktop PDF editor or a dedicated signing service will be faster today. For the common case, a signature on one or two pages, this tool does the job in under a minute.

Yes. Type your name in Arabic, Hebrew, Chinese, Japanese, or any other script and the typed signature renders correctly on the page.

How It Works
Standard PDF fonts cannot encode non-Latin scripts, so instead of pushing your name through a font that would break it, BlendPDF shapes the text in your browser — where Arabic letter joining and right-to-left direction are handled natively — and places the result on the page. Arabic names come out properly connected and ordered, not as disconnected or reversed letters.

Prefer a Handwritten Look?
An image signature works in any script too: write your signature by hand, photograph it, and upload it. Many people find a real handwritten Arabic signature looks more personal than typed text — both options work.

The Document Itself Can Be in Any Language
The PDF you are signing can be in Arabic or any other language, with right-to-left layout, and it is preserved untouched — the signature is drawn on top without reprocessing the page content.

Completely free, and there is no watermark. The signed document contains your signature and nothing else added.

Why This Is Worth Stating
E-signing is a category where "free" usually means a trial: three signatures and then a subscription prompt, or a "Signed with X" banner stamped on your legal document. BlendPDF does neither. There is no signature quota, no premium tier, and nothing added to your file beyond the signature you placed. A fair-use rate limit (20 jobs per 15 minutes) exists to keep the service responsive, and normal use never touches it.

No Sign-Up Either
No account, no email verification, no personal details. After signing, you can optionally have the file emailed to you, but the direct download works without entering anything, an email is never required to get your document.

Yes. Documents you sign, contracts, agreements, forms, are often sensitive, so here is precisely how they are handled.

In Transit and During Processing
Your PDF and signature image travel over an encrypted HTTPS connection. Processing is fully automated, no person views your document, and the signature is applied in memory by the processing engine.

After Processing
Files are deleted from our servers within one hour at most, and in most cases immediately after processing. There are no backups and no archive; your signed contract does not sit in storage somewhere.

What We Collect, Honestly
No account or personal information is required. We never read, store, or share the contents of your documents or your signature image. For transparency: BlendPDF uses Google Analytics for aggregate, anonymous usage measurement (how many people used the tool), which never includes your files or their contents.

One Sensible Precaution
Your signature image is worth treating like a signature: keep the file somewhere private on your device, and share signed documents only with their intended recipients, the same care you would take with a wet-ink signature.

Not directly. An encrypted PDF cannot be read by the signing engine, so a password-protected file will fail with an error rather than sign.

The Three-Step Workflow
First, remove the password with our Unlock PDF tool, you need to know the password. Second, sign the unlocked copy here. Third, if the signed document should be confidential again, re-protect it with the Protect PDF tool, which applies real AES-256 encryption. The whole round trip takes a couple of minutes.

If You Do Not Know the Password
Then it cannot be unlocked, by us or any honest tool, and it cannot be signed. Ask the sender for the password or for an unprotected copy. If the file merely restricts editing but opens without a password, the Unlock tool's "Remove Restrictions" mode clears that without any password.

Yes, and this is one of the most common uses of the tool. Because the signature is drawn on top of the page, it does not matter whether the page underneath is digital text or a scanned image.

The Classic Scenario
Someone emails you a scanned form or agreement and asks you to sign and return it. Without this tool, that means print, sign, scan, email, assuming you own a printer. With it: upload, place your signature image on the right page, download, reply. The result is visually identical to the print-and-scan version, and usually cleaner.

One Honest Limitation
Scanned pages are pictures, so the text in them is not selectable or searchable, and signing does not change that. BlendPDF does not currently offer OCR (text recognition). If you need the scanned document's text to be searchable or editable, run it through an OCR tool first; if you just need it signed, no OCR is needed at all.

Positioning on Scans
Scanned forms often have a signature line in a specific spot. Choose the preset position closest to it (usually bottom-left or bottom-right) and check the live preview. Slightly imperfect placement on a scan is normal, exactly as it is with a pen.

The limits are simple and generous enough that most users never meet them.

The Numbers
One PDF per operation, up to 50MB. Signature images up to 5MB, in PNG or JPEG format only (other formats are rejected with a clear error). No page-count limit, you can sign page 1 or page 500, and the page picker accepts any page that exists in the document.

If Your PDF Is Over 50MB
Oversized PDFs are usually scan-heavy. Run the file through our Compress PDF tool first, it keeps text selectable and returns your original unchanged if it cannot shrink the file, then sign the compressed copy.

Processing Time
Signing is fast, typically a few seconds. Large scanned files take slightly longer to upload and download, but the signing step itself is quick regardless of page count, since only the chosen page is modified.

Three honest comparisons, since these are the alternatives people actually weigh.

Versus Print, Sign, Scan
The end result is legally and visually equivalent, both produce a document bearing a picture of your signature. BlendPDF skips the printer and scanner, takes a minute instead of ten, and preserves the document's quality: text stays selectable and pages stay crisp, whereas a re-scan degrades everything to a photograph. If you do not own a printer, this is not even a comparison.

Versus Adobe Fill & Sign
Adobe's Fill & Sign produces the same class of signature, a simple visual e-signature, not a certificate-based one. It offers freehand placement and saved signatures, which is genuinely convenient; it also involves installing an app or signing in to an Adobe account, and its free tier nudges toward subscriptions. BlendPDF runs in any browser with no account and no installation. Pick based on how often you sign: daily heavy use may justify Adobe's tooling, occasional signing does not.

Versus Certificate-Based Signing Services
Dedicated e-signature platforms provide things BlendPDF deliberately does not: identity verification, cryptographic seals, audit trails, and multi-party signing workflows. They also cost money per month or per envelope. For a high-stakes contract, they are worth it, and we will tell you so rather than pretend a visual overlay is the same thing. For the everyday "sign this and send it back," BlendPDF does the job free.

Failures are rare and nearly always have one of these causes.

The PDF Is Password Protected
Encrypted files cannot be processed. Unlock the file first with the Unlock PDF tool, then sign the unlocked copy.

Image Problems
The signature image must be a PNG or JPEG under 5MB. Screenshots saved as WebP, HEIC photos straight from an iPhone, and PDF "images" all need converting to PNG or JPEG first, most phones and image viewers can export or share as JPEG in one step.

Invalid Page Number
If you request a page the document does not have, the error tells you how many pages the PDF actually contains. This usually means the page count was remembered from a different document; check the preview and pick a valid page.

Corrupted or Oversized Files
Files over 50MB are rejected, compress first. A file that fails despite meeting the limits may be damaged; try our Repair PDF tool, which attempts recovery with multiple engines but honestly cannot fix every broken file. If you see a "too many requests" message, you hit the fair-use rate limit of 20 jobs per 15 minutes, wait a few minutes and continue.