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PDF에 워터마크 추가
PDF 전체 또는 선택한 페이지에 텍스트·이미지 워터마크를 넣습니다.
Your files are processed locally in your browser and never uploaded.
Your files are processed locally in your browser and never uploaded.
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사용 방법
- Choose a readable PDF and select Text or Image / logo.
- Set opacity, angle, position, spacing and a page range such as 1-3,5.
- Preview the first page, apply the watermark and download the page-preserving PDF.
이런 경우에 유용합니다
- Confidential document labels
- Draft and copyright notices
- Branding reports with a logo
Private, local PDF processing
BrightTools reads the selected PDF in your browser and never uploads it. File contents, names and passwords are not sent to analytics. A shared 50 MB and 200-page safety limit keeps memory use predictable on phones and desktops.
Quality and validation
Compression renders each page at a bounded resolution, encodes it as JPEG and checks the real output bytes. Target-size pages use a finite coarse-to-fine search; they never delete pages or create blank or damaged PDFs. The result is reparsed to confirm page count and page dimensions before download.
Related PDF tools
Need to prepare a document first? Merge PDFs, split pages, organize pages, convert an image to PDF or export a PDF to images.
알아둘 점
Watermarks are embedded visual stamps. Original text remains intact, but the stamp itself is not editable as PDF text. Transparent logos are converted to PNG locally.
자주 묻는 질문
Can I watermark only selected pages?
Yes. Enter a validated range such as 1-3,5; duplicate and out-of-range page numbers are rejected.
Does it support Chinese and emoji?
Yes. Text is rendered through the browser canvas and embedded as a crisp PNG stamp.
Can I use a logo?
Yes. PNG, JPG and WebP logos are accepted; transparency and aspect ratio are preserved.