Someone has emailed you a PDF to sign — a contract, a consent form, an agreement — and you need your signature on it and the file sent back. Signing can mean two different things: a drawn or typed signature image placed on the page for everyday paperwork, or a cryptographic digital signature that proves identity and detects later changes, the kind some legal and government workflows require. This guide is clear about what the free organizer this site covers cannot do, and where each kind of signing actually happens.
What PDF Arranger can and cannot do here
PDF Arranger has no signing features at all: no way to draw, type or place a signature, no digital certificate support, and no signature validation. It cannot sign a document, and it cannot tell you whether a signature already on a document is genuine. That absence is total, so there is no partial workaround inside the program to describe.
What it can do is the paperwork around a signature. Before signing, you can use it to assemble the exact file that needs the signature: merge the agreement with its annexes, delete the instruction pages you were told not to return, and order everything the way the other party expects. After signing in a proper tool, PDF Arranger can just as usefully merge the signed copy with supporting documents for your own records. That is page preparation and filing — useful, but it is not signing, and we will not dress it up as signing.
Tools that can sign a PDF
- Adobe Acrobat — Acrobat’s Fill & Sign tools cover everyday drawn and typed signatures, and full Acrobat also handles certificate-based digital signatures for workflows that require them. See Adobe Acrobat (sponsored); Acrobat Reader, which is free, covers basic filling and signing, while Pro is $19.99 per month on an annual plan billed monthly (US pricing, checked October 2026).
- Wondershare PDFelement — a desktop editor that lets you sign documents locally, a good fit when the file should not leave your computer. See Wondershare PDFelement (sponsored).
- Sejda (online) — for a one-off signature on a non-sensitive document, Sejda’s browser-based sign tool avoids installing anything. Use the official Sejda site; remember the file is uploaded for processing, and note that Sejda has no affiliate relationship with this site — the link is a plain reference.
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Which kind of signature do you need?
Read the request before you pick a tool. Most everyday paperwork — school forms, delivery confirmations, simple agreements between people who know each other — accepts a drawn or typed signature image. Some regulated workflows, tenders and cross-border legal processes ask specifically for a qualified or certificate-based digital signature, and a picture of your handwriting will not satisfy them, no matter which app placed it. If the request mentions certificates, validation or a specific signing standard, go straight to a tool with certificate support and verify the signature afterwards in the same program. When in doubt, ask the sender which kind they will accept — it is a two-line email that prevents a rejected document.
After you sign: handling the signed copy
A signed document deserves a little care once it comes back. Save the signed version under its own name and keep the unsigned original untouched — you may need it again if the deal changes. If your copy must travel with attachments, merge the signed file and its supporting documents into one package with PDF Arranger, and consider password-protecting the combined file before emailing it, a workflow our password-protection guide covers. Finally, if the other party later questions the signature, the validation has to happen in a tool that understands signatures — Acrobat can report whether a signed file was altered after signing. A page organizer can confirm the pages are all there; it cannot vouch for the signature itself, and a careful sender does not ask it to.