Add a Watermark to PDF (Free & Private)
Mark copies as confidential, draft or personal before you share them, without sending the document anywhere.
100% private: your files never leave your browser· 0 requests to other servers since this page opened.How to verify it yourself
In short
CareerPDF adds a text watermark such as CONFIDENTIAL to a PDF, centred or tiled, with your choice of size, colour, opacity and angle, in any language including Arabic. The document is processed in your browser and never uploaded.
A watermark tells anyone who receives a copy what it is for: CONFIDENTIAL, DRAFT, COPY, or “Only for the visa application of…”. Adding one before you send identity documents is one of the simplest ways to reduce the risk of misuse. CareerPDF adds text watermarks in your browser.
You control the text, size, colour, opacity, angle and layout, and you can apply the watermark to every page or only selected ones. Because the text is drawn by your browser’s text engine, it works in any language, including Arabic, with correct letter shaping.
The watermark is rendered once and reused on every page, so even long documents are processed quickly and the file grows only slightly. The live preview shows how the mark will look before you apply it, and the tool takes each page’s stored rotation into account so the text is never upside down.
How to add a watermark to a PDF
Step 1: Open the PDF
Drop the document you want to protect, or choose it with the keyboard.
Step 2: Write the watermark
Type the text, for example CONFIDENTIAL or a sentence naming the recipient and purpose. Adjust the font size and colour to suit the document.
Step 3: Set opacity, angle and layout
Lower opacity keeps the content readable. A 45 degree angle is the classic diagonal. Choose one centred mark, or tile it across the page to make cropping harder.
Step 4: Apply and download
The watermark is placed correctly even on pages that are stored rotated. Download the result, or continue to compression or signing.
Zero-Server
Protecting documents without exposing them first
The documents people watermark are usually their most sensitive: passports, national ID cards, bank statements and contracts. Uploading them to an online watermarking service creates the very exposure the watermark is meant to limit.
In CareerPDF the text is rendered to a transparent image on a canvas inside your tab, embedded once in the PDF and placed on each page by pdf-lib. The original never leaves your device. Note that a visible watermark discourages misuse but is not encryption: keep the unmarked original in a safe place.
Where watermarks make sense
- Marking ID copies with the purpose they are shared for.
- Labelling drafts before circulating them for review.
- Stamping confidential reports sent to external partners.
- Adding a name or company to documents you distribute.
- Discouraging screenshots and reuse of shared previews.
Frequently asked questions
Can I write the watermark in Arabic?
Yes. The text is drawn by your browser, which shapes Arabic and other scripts correctly, then placed in the PDF as an image.
Can the watermark be removed later?
It is merged into each page and cannot be removed with ordinary viewers. Determined editing can hide any visible mark, so keep the original safe.
Will it cover my text?
Use an opacity around 15 to 25 percent and a light colour. The content underneath stays readable while the mark stays visible.
Can I watermark only certain pages?
Yes. Choose “Only these pages” and type the pages or ranges, for example 1, 3-5.
Is the watermark text selectable?
No. It is stored as an image so that every language renders reliably. This also makes it slightly harder to strip out with text tools.
Is my document uploaded?
No. Everything happens inside your browser.
How large a file can I process?
There is no limit imposed by a server, because no server is involved. The limit is your device’s memory: a modern computer handles files of a few hundred megabytes, while phones are more comfortable below about 100 MB.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, Safari and Samsung Internet on desktop, Android and iOS. JavaScript must be enabled, because the processing itself is JavaScript running on your device.