Watermark PDF Online

A report for a client or for printing often needs consistent numbering, a visible draft mark or cleaner margins. A good-looking preview is the starting point: the exported document still needs the right page range, readable text and enough space at the edges.

Can I add a logo instead of a text watermark?

Processed on your device. Nothing is uploaded.

• Text
• Font weight
• Logo image
• Color
• Rotation
• Opacity
• Repeat across page
• Behind content
• Apply to

Before you start

Keep the original file. Work on an exported copy, especially with signed forms or important documents. Check that the file opens and that the pages you need are present. A password-protected PDF may ask for its existing password; that password is not stored.

Check the exported result

Open the downloaded file before sharing it. Check the page count, order, orientation and any small text. Look at the first and last pages as well as the page you edited. For an upload limit, check the actual saved file size rather than relying only on an estimate.

Scans, text and signatures

A scanned PDF is a collection of page images even when it looks like a normal document. Image conversion does not automatically recognize text. Search-based redaction needs selectable text; scan images require manual boxes. Editing a document may invalidate existing digital signatures.

Local processing and shared devices

Files, text, edits and results are processed on your device and kept only in the open page. They are not uploaded for processing. Reloading or closing the page clears the workspace. Files you download to your device remain there until you delete them.

Apply Watermark to PDF to protect your intellectual property. Add text stamps like "CONFIDENTIAL" or your company logo overlay.

If you need to prepare the document for signing instead, check out Sign PDF.

Why use Skyron Tools?

• Privacy-First & Secure: All processing happens directly in your browser. We never upload your files to any server.
• Corporate Grade Security: Ideal for handling sensitive documents, contracts, and NDA-protected images. Since data never leaves your device, it is impossible for third parties to intercept it.
• No Limits: Convert as many files as you want, of any size (limited only by your device's RAM).
• Fast & Offline Capable: Works instantly without waiting for network uploads.

How it works

Unlike converters that upload files to a cloud server, Skyron Tools processes them directly in your browser using browser-native codecs, WebAssembly, or local JavaScript workers as appropriate.