How to Make a Verifiable Company Seal Online (Not Just a PNG)

Make your company stamp or seal now. Round seals, dated stamps and approval marks, with a date that fills itself in and a serial number that never repeats. Free to design, and it goes straight onto a PDF, a Word file or an Excel sheet.

Start from one of these and change the wording, or start from nothing:

Search "company seal online" and you will find plenty of tools that hand you a nice round seal as a PNG. The problem: a picture of a seal proves nothing, it can be copied onto any document in seconds. If your seal is meant to signal authenticity to a bank, registry, partner, or court, you need a seal that can be verified, not just viewed. Here is the difference, and how to make one.

Why a picture of a seal is not enough

A traditional company seal (or "common seal") signals that a document is officially executed by the company. The digital equivalent most generators produce is an image, and an image carries no proof. Anyone who receives a sealed document can lift the seal and reuse it. There is no way for a third party to tell a genuine application from a forged one.

For internal memos that is harmless. For board resolutions, certified copies, share certificates, or anything a regulator might examine, an unverifiable seal is a weak link.

What makes a seal "verifiable"

A verifiable digital seal adds three things a flat image lacks: a serial number unique to each application, a verification token a recipient can check, and a public verification page (often reached by a QR code or link) that confirms the seal is genuine, shows which document it belongs to, and whether it has been revoked.

Crucially, the seal is bound to the document by a cryptographic fingerprint (SHA-256), so if a single character of the document changes after sealing, verification fails. That binding, seal to specific, unaltered document, is what turns a decorative mark into evidence.

Revocation: the thing a rubber stamp can never do

Physical seals and image seals are permanent, once out, they cannot be recalled. A verifiable digital seal can be revoked: if trust changes, or a document is superseded, you withdraw the seal and anyone who verifies it sees that it is no longer valid. That single capability is a strong reason to move company seals online properly, not just as graphics.

How to create one

Open the stamp and seal designer at pdfverified.com/stamp-maker. Choose a round seal, add your company name and registration number around the ring, a centre mark or logo, and a date or serial line. Preview it live, then either download a transparent PNG for $1.50 or apply it directly onto your PDF as a serialized, QR-verifiable seal.

When you apply it to a document inside PDF Verified, the document is sealed with a tamper-evident SHA-256 fingerprint and carries a public verification link on every page, so a recipient can confirm, in seconds and without an account, that the seal and the document are genuine. That is the difference between a seal people look at and a seal people can trust.

Questions people ask about this

Can I add a stamp to a PDF, a Word document and an Excel spreadsheet?

All three, and without exporting anything first. A .docx is laid out in the browser the way Word lays it out and a .xlsx the way Excel prints it, so the seal lands on the page you would have printed rather than on a converted approximation of it.

What is a digital company stamp?

A company seal you apply to a file rather than press onto paper. The useful difference is not convenience: each application carries a serial number that does not repeat and a link anybody can open to see which document it was applied to, which a rubber block cannot do.

Can I make a PAID stamp, an APPROVED stamp or a RECEIVED stamp too?

Yes, and they are the marks most businesses use daily. Each can date stamp a document automatically, so a batch stamped on Friday is never dated Thursday because nobody turned the bands over.

How do I make a company seal online?

Design it in the stamp maker: the shape, the ring text with your registered name, a registration number, and a date band that fills itself in. It is free to design and it goes straight onto a PDF, a Word file or an Excel sheet.

Is a digital company seal legally valid?

In most common-law countries a contract is valid on signature alone and a seal is evidentiary. In many Gulf, Asian and African markets a company seal is expected on commercial documents. Which applies is a question for the party asking and for local practice.

How does somebody verify a company stamp is genuine?

Every application mints a token with its own verification page. Scan the QR on the document or open the link from the audit certificate to see the stamp, its serial number, the document it was applied to and whether it has been revoked.

Can I add a company stamp to an invoice?

Yes, and it is the most common use. A stamped invoice clears accounts-payable checklists that an unstamped one does not, which is worth fifteen seconds against three weeks of chasing.

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What PDF Verified is, and what it is not

A stamp identifies who issued a document. It is evidence rather than a formality that makes a document binding on its own, and it should only ever be made and applied for a business or an office you are authorised to act for: a mark that imitates another organisation in order to pass a document off as theirs is forgery in most places. Where a registry, a bank or a counterparty requires a particular form of seal, that requirement comes from them.

PDF Verified is a tool for preparing, signing, stamping and checking documents. It is not a law firm, a compliance service or a forensic examiner, and nothing here is legal, financial or compliance advice. Requirements differ by country, by document type and by the party asking, so check what applies to your document before you rely on it, and take advice where the document matters. You are responsible for the documents you create, sign and send, and for having the authority to do so: signing or stamping in somebody else name, or as an organisation you do not represent, is forgery whatever tool is used. To the extent the law allows, we accept no liability for how a document made with this tool is used or relied on. The full position is in our terms of service.

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