PDF Watermark
Brand & Protect
Add professional text watermarks to every page of your PDF entirely in your browser. Customise opacity, rotation, and text — zero uploads, zero risk.
Drag & drop or click to upload
PDF only · Max 50 MB · Processed locally, never uploaded
Live preview updates as you type. The watermark is rendered into every PDF page using pdf-lib — no server involved. The document preview below shows exactly how each page will look after download.
Custom Text Watermark
Type any label — DRAFT, CONFIDENTIAL, your name — and see it rendered across every page instantly.
100% Private
All processing runs in your browser via pdf-lib. Your documents never leave your device.
Instant Download
Apply watermarks to 100-page PDFs in under a second and download immediately — no waiting.
Professional PDF Watermarking — Free & Offline
Diagonal & Custom Rotation
Rotate your watermark from 0° to 360° for diagonal, horizontal, or any angle that fits your document style.
Fully Customisable Opacity
Fine-tune transparency so the watermark is clearly visible without obscuring your content — perfect for drafts and proofs.
Multi-Page Support
Whether your PDF has one page or hundreds, every page receives the watermark in a single click.
Zero Privacy Risk
Built on pdf-lib running entirely client-side. Your confidential documents are never transmitted anywhere.
Frequently Asked Questions
Does my PDF get uploaded to a server?
No. All processing uses pdf-lib running entirely in your browser. Your file never leaves your device.
Can I watermark a multi-page PDF?
Yes. The watermark is applied to every page automatically, regardless of page count.
What watermark text can I use?
Any plain text up to 40 characters — CONFIDENTIAL, DRAFT, your company name, copyright notice, etc.
Can I adjust how visible the watermark is?
Yes. Use the Opacity slider (5 %–100 %) and Rotation slider (0 °–360 °) for full control over appearance.
If MERAPDF helped you convert, compress, or secure your documents, you can support its development. Your contribution helps keep this project always free, offline, and privacy-first.
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Donations are optional. No files are uploaded. No data is stored.