Fichiers
Ajouter un filigrane à un PDF
Ajoutez un filigrane texte ou image à toutes les pages ou à une plage de pages.
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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Mode d’emploi
- 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.
Idéal pour
- 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.
À savoir
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.
Questions fréquentes
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.
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