Whether you need a round official seal for contracts, a square stamp for invoices, or a custom company chop for PDF documents — you can create one online for free in under 2 minutes.
Round Stamp vs Square Stamp — Which Do You Need?
- Round stamp (官印/公章) — the standard format for official company seals in China, Japan, and many Asian business contexts. Features a five-pointed star in the center, company name around the outer ring, and department name inside.
- Square stamp (方章) — common for contract-specific seals (合同专用章), financial stamps (财务专用章), and Western corporate seals. Double-border rectangle with company name and registration number.
How to Create a Company Stamp Online
- 1Open the free Stamp Maker tool
- 2Choose shape: Round or Square
- 3For round stamps: enter your company name (outer ring text) and department or type (inner text). Toggle the center star on/off.
- 4For square stamps: enter main text (large, e.g. 合同专用章), sub text (company name), and a code/number.
- 5Select stamp color: Red (most common), Blue, Black, Green, or Purple
- 6Preview updates in real time — the preview shows a transparent background
- 7Click Download PNG to save
The stamp is exported as a transparent PNG — ready to drag into any PDF signing tool, Word document, or image editor.
How to Use Your Stamp in a PDF
- 1Download the transparent PNG stamp from the Stamp Maker
- 2Open the PDF Sign tool
- 3Click 'Add Signature' → choose the Upload tab
- 4Upload your stamp PNG
- 5Drag and resize it to the correct position on the document
- 6Download the stamped PDF
Stamp Color Guide
- Red — official seals, contract stamps, most formal documents
- Blue — financial stamps, acknowledgment stamps in some jurisdictions
- Black — Western corporate seals, notary stamps, draft/received stamps
Create your company stamp free — round or square, any color, transparent PNG download.
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