Add watermark to PDF
Files stay in your browser. PDF bytes are not uploaded.
Drop PDF files here
Add one PDF or a batch. Large files depend on your browser memory.
Preview
Add a watermark to a PDF in your browser, without uploading the file. It is useful for Gibraltar business proposals, invoices, client reports, shipping or property documents, internal policies, course handouts, draft agreements, and PDFs that need a visible “Draft”, “Confidential”, “Sample”, “Paid”, business name, or logo before sharing.
The tool is intentionally focused on the action behind “add watermark to PDF”: choose text or a logo, preview the placement, adjust opacity and rotation, target all or selected pages, and download a new copy. For several files, apply one watermark profile and download a ZIP.
How to add a watermark to a PDF
Choose your PDFs
Select one or more PDF files. The files are read in your browser so the source content does not need to be uploaded.
Add text or a logo
Use text such as Confidential, Draft, Sample, Paid, Internal, or upload a PNG/JPEG logo.
Set placement and pages
Adjust opacity, rotation, layer, position, tiling, and page targeting including ranges and custom expressions.
Download the result
Export a new watermarked PDF, or download a ZIP when processing multiple files.
Text watermarks for drafts and client documents
Text watermarks are ideal when the document status needs to be obvious. Common choices include “DRAFT”, “CONFIDENTIAL”, “SAMPLE”, “PAID”, “INTERNAL”, a client name, a case reference, or a project code. Keep the wording short and begin with opacity around 20–30% so the PDF remains readable.
A diagonal centre mark works well on draft contracts and review packs. A smaller corner watermark is better for invoices, statements, proposal PDFs, and reports where figures, signatures, and dates must stay clean.
Logo and image watermarks
Image mode lets you add a company logo, approval stamp, project mark, or simple graphic watermark. Transparent PNG is best for logos because it avoids a white box around the artwork. JPEG is fine for rectangular images.
For professional documents, a subtle corner logo often looks cleaner than a large mark over the body text. If you use a centre logo, reduce opacity and check the preview on portrait and landscape pages.
Page ranges, odd/even pages and tiled marks
Use page targeting when only part of the PDF needs a mark: the first page of a quote, schedules in a contract, odd pages in a booklet, or everything after a cover section. Custom expressions such as 1-3, 7, 10- help with long files.
Tiled watermarks repeat across the page and are useful for confidential review copies or sample documents. Increase spacing if the mark distracts from tables or dense text.
Browser privacy and practical limits
Watermarking runs in the browser. That helps when files contain client details, commercial terms, employee information, legal drafts, or internal notes that do not need to be uploaded for a visible label. The original PDF is not overwritten.
Browser memory is the practical limit. Very large scans or large batches may be slower than ordinary digital PDFs, so split big jobs if needed.
Watermarks are not redaction or signatures
A visible watermark is a label and deterrent, not a security control. It does not remove sensitive information, prevent copying, or replace password protection and digital signatures. If a PDF has a cryptographic signature, adding a watermark normally invalidates that signature because the file changed.
Troubleshooting
If the watermark is too strong, reduce opacity. If a logo shows a white background, use a transparent PNG. If an encrypted PDF will not open, unlock it first. For mixed page sizes, inspect several pages before exporting the final version.
