Add a Watermark to Your PDF — Instantly, Without Uploading Anything

Stamp "Confidential", your logo, or any custom text onto your PDF in a few clicks. No cloud, no sign-up — processing happens entirely inside your browser.

Whether you need to protect a draft contract, brand a report before sharing, or mark sensitive documents as confidential, adding a watermark to a PDF is one of the most common document tasks in any professional workflow. Most online tools upload your file to a remote server — which is a real problem when the PDF contains private data. iSharePDF takes a fundamentally different approach: every operation runs locally in your browser using client-side JavaScript. Nothing ever leaves your machine.

Why Local Processing Makes All the Difference

• Zero upload, zero exposure. Your PDF is read and modified directly in your browser tab. It never reaches any server — not ours, not anyone else's. This is the only genuinely safe option for confidential or legally sensitive documents.
• No account required to start. Open the tool, drop your file, set your watermark, download. The free tier gives you 5 tasks per day with no registration. Create an account only if you want Pro features.
• France & EU hosted, zero tracking. iSharePDF is built and hosted in France, fully compliant with GDPR. No analytics scripts on the tool pages, no behavioural tracking, no cookies dropped without your consent.
• Chrome extension available. Install the iSharePDF extension to watermark PDFs directly from your browser toolbar — useful when you download a document and want to stamp it before forwarding it, without switching tabs.

How to Add a Watermark to a PDF in 4 Steps

1. Open the watermark tool at /app/tools/watermark — no sign-up needed for the free tier.
2. Drop your PDF onto the upload zone or click to select it from your device. The file loads locally; nothing is sent anywhere.
3. Configure your watermark: type your text (e.g. "Confidential", "Draft", your company name), choose font size, opacity, rotation angle, and position (center diagonal, top corner, tiled, etc.).
4. Preview and adjust on the live preview — all changes render instantly so you can fine-tune opacity and placement before committing.
5. Download your watermarked PDF with one click. The output file is generated in your browser and saved directly to your device.

iSharePDF vs. Other Watermark Tools