Sign, watermark and seal PDF

PDF signature, watermark and seal – quick guide

Use this page to add a signature, watermark or seal to your document with purely client-side PDF editing. There is no upload – everything runs in your browser.

Steps:

1. Open PDF: click to upload or drag and drop the file.
2. Select mode: choose Watermark, Signature (Draw / Type / Image) or Seal.
3. Adjust settings:
   • Watermark: language/phrase or custom text, font, size, color, opacity and angle – the watermark is centered on every page.
   • Signature: draw on a canvas, type with a handwriting style font or upload an image; colour and size can be adjusted.
   • Seal: specify 1–4 lines of text and choose a colour.
4. Position: drag the element to the desired point; use the corner handle to resize and the icon to rotate it. You can add multiple elements per page.
5. Save / Print: export to a new PDF or print directly.

Note: password-protected PDFs cannot be edited – remove the protection and reload the file.

When is it useful?

• Quickly sign forms and declarations (drawn, typed or image signatures).
• Add “CONFIDENTIAL / DRAFT” style PDF watermarks for consistent labelling.
• Place a company seal (multi line text) on proposals and invoices.
• Internal approval – add multiple signatures and watermarks in the same document.
• Branding – consistently apply a logo or text watermark.

Frequently asked questions

Is this a qualified (eIDAS) electronic signature?

No. Here you can embed a visual signature (image or text) in the PDF. A qualified signature requires a dedicated service provider.

What about privacy?

All operations occur in your browser, and the file is never uploaded (no uploads).

Does the document quality degrade?

The signature and seal are embedded as images and the watermark is rendered across the whole page; the export uses gentle compression.

Can it be applied to multiple pages?

Yes. The watermark appears in the middle of every page; signatures and seals can be placed on a page by page basis.

Related tools: PDF merge, PDF compression, PDF → image.

Add visible signatures, seals and watermarks carefully

Visual signatures and watermarks are useful for everyday document handling: approvals, draft labels, internal circulation, client forms and branded PDFs. They are not the same as a qualified electronic signature, but they can make a document clearer and easier to route through a team.

Before adding a signature, decide what the mark is meant to communicate. A drawn signature can show acknowledgement, a watermark can mark a document as draft or confidential, and a seal can identify the sender. Avoid placing marks over important text, amounts, dates or QR codes. After export, zoom in and check the pages where the mark appears.

Safe signing and watermarking habits

• Use clear labels such as DRAFT, INTERNAL or CONFIDENTIAL when the document status matters.
• Keep a clean unsigned copy if the file may need later changes.
• Do not use a visual mark as a substitute for legally required digital signing.
• Password-protect the output when it contains sensitive information.

Local processing is helpful because signatures and internal labels can be added without sending the source PDF to an outside editing service.

A safer PDF workflow in three minutes

Before using any PDF tool, make a working copy and leave the original untouched. This gives you a clean fallback if a page is removed, a mark is misplaced, or an export setting produces a result you do not want. For sensitive documents, also check whether every page belongs in the file before you begin. Removing unrelated pages early is one of the simplest privacy improvements.

After export, open the output as a recipient would. Check page order, page orientation, small print, signatures, stamps, form fields and file size. If the PDF will be emailed, uploaded to a portal or stored in a shared folder, decide whether it should be compressed or password-protected first. The final copy should be the exact file you intend to share, not a draft that still needs explanation.

Use this quick checklist

• Work on a copy, not the only original.
• Remove pages and images that the recipient does not need.
• Use a clear filename with purpose and date.
• Open the exported PDF before sharing it.
• Password-protect sensitive outgoing files and send the password separately.