PDF Watermark
Add a text watermark to every page
PDF Watermark — what it does
Add a text watermark to every page of a PDF, with control over the text, its size and its opacity. A watermark states a document's status on the page itself, so a printed copy still says DRAFT or CONFIDENTIAL long after the email that carried it has been forgotten.
When this tool helps
- Marking a document as DRAFT so a work-in-progress version is never mistaken for final.
- Stamping CONFIDENTIAL across a document circulated to a limited audience.
- Adding a recipient name or reference so a leaked copy can be traced back.
How to use it
- Choose the PDF file.
- Enter the watermark text.
- Set the text size and opacity.
- Process and download the watermarked PDF.
Accuracy, limits, and good practice
- Low opacity keeps the document readable while the mark stays unmistakable — around 15 to 25 percent is the usual balance.
- Large diagonal text across the page is harder to crop or ignore than a small mark in a corner.
- A watermark is a deterrent and a label, not a security control; it does not prevent copying or editing the document.
- Watermark the copy you send, not the master. The version you keep should stay clean so the final release does not say DRAFT across every page.
Frequently asked questions
Can it be removed?
The text becomes part of the page content, so casual removal is impractical, though a determined editor with the right tools can do it.
Can I watermark only some pages?
The watermark applies to every page. Split, watermark and merge back for selective application.
Can I use an image instead of text?
Yes, the PDF image stamp tool applies a logo or stamp image to every page.
Does it appear behind or over the content?
Over the page content, which is what makes it legible on a dense page — keep the opacity low so the text underneath stays readable.
Related tools on this site
- Find & Replace — Replace repeated words or phrases at once
- Delete PDF Pages — Remove selected pages and download a clean PDF
- PDF Page Border — Draw a customizable border around selected PDF pages
Everything above runs inside this page. PDF Watermark needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
PDF 浮水印能做什麼
為 PDF 每一頁加上文字浮水印，文字內容、大小與透明度都可控制。浮水印把文件狀態寫在頁面本身，因此在承載它的那封郵件早被遺忘之後，印出來的副本上仍然寫著「草稿」或「機密」。
什麼時候用得上
- 把文件標為草稿，避免半成品版本被誤當定稿。
- 在小範圍流通的文件上蓋「機密」。
- 加上收件人姓名或編號，讓外流副本能被追溯。
使用步驟
- 選擇 PDF 檔案。
- 輸入浮水印文字。
- 設定文字大小與透明度。
- 執行處理並下載加浮水印的 PDF。
精確度、限制與實務建議
- 低透明度能讓文件保持可讀、標記依然明確——約 15% 至 25% 是常見的平衡點。
- 橫跨頁面的大字斜向浮水印，比角落的小標記更難裁掉或忽視。
- 浮水印是嚇阻與標示，不是資安控管；它不會阻止複製或編輯文件。
- 請在要寄出的副本上加浮水印，而不是母檔。自己留的版本要保持乾淨，正式發布時才不會每頁都印著「草稿」。
常見問題
浮水印可以被移除嗎？
文字已成為頁面內容的一部分，隨手移除並不容易，但有心人用適當工具仍可能辦到。
可以只為部分頁面加浮水印嗎？
浮水印會套用到每一頁。需要選擇性套用時，請拆分、加浮水印後再合併。
可以改用圖片嗎？
可以，PDF 圖片印章工具能為每一頁套上商標或印章圖片。
浮水印在內容前面還是後面？
在頁面內容之上，這樣在內容密集的頁面上才看得清楚——請把透明度調低，讓底下的文字仍可閱讀。
本站相關工具
以上步驟全部在這個頁面內完成，PDF 浮水印 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。