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Watermark PDF

Stamp a diagonal text watermark across every page of your PDF.

Choose PDF file

Drag & drop your file anywhere in this box.

Encrypted upload, deleted right after processingFree · No sign-up · No watermarks

Simple, practical guidance

How to use Watermark PDF

Apply a clear ownership, review, or confidentiality mark across selected PDF pages. Follow these steps to get a result you can confidently review, save, and share.

  1. 1

    Upload the PDF.

  2. 2

    Enter watermark text or choose an image.

  3. 3

    Adjust placement, size, opacity, and page range.

  4. 4

    Apply the watermark and download the marked PDF.

Get a better result

Opacity, size, and position should keep the watermark visible without hiding important content.

Know how your file is handled

The file is sent to the configured processing server because this job needs software that a browser cannot provide. Avoid uploading documents you are not permitted to process.

Check before you share

A watermark is a visual notice, not a substitute for encryption or access control.

Questions people ask

Watermark PDF FAQ

Clear answers about file quality, privacy, compatibility, and what to expect from the conversion.

What does Watermark PDF do?

Apply a clear ownership, review, or confidentiality mark across selected PDF pages. It accepts a PDF plus watermark text or artwork and produces a watermarked PDF.

How do I use Watermark PDF?

The process is straightforward. Upload the PDF. Enter watermark text or choose an image. Adjust placement, size, opacity, and page range. Apply the watermark and download the marked PDF.

Is Watermark PDF available now?

Watermark PDF is available now on Big PDF Tools.

Will Watermark PDF reduce the quality of my document?

Opacity, size, and position should keep the watermark visible without hiding important content.

Is it safe to use Watermark PDF with private files?

The file is sent to the configured processing server because this job needs software that a browser cannot provide. Avoid uploading documents you are not permitted to process.

Can I use Watermark PDF on a phone or tablet?

Yes. Watermark PDF works in a modern mobile browser: the file is sent to the server for processing, so keep a stable connection and leave the tab open until the job completes.

Is there a maximum file size for Watermark PDF?

The practical limit depends on the upload size and the processing server. If a very large file stalls, try a smaller file or split the work into manageable parts.

Does Watermark PDF change my original file?

No — your original file stays unchanged. Watermark PDF saves a watermarked PDF as a separate download.

How long does Watermark PDF take?

Small files usually finish quickly. Large page counts, high-resolution images, complex layouts, upload speed, and server load can all increase how long Watermark PDF takes.

Why did my Watermark PDF job fail or look different?

A watermark is a visual notice, not a substitute for encryption or access control. Also confirm that the source file is not damaged, uses a supported format, and is not blocked by an unknown password.