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PDF Viewer & Live Editor100% private, client-side PDF viewer and live vector editor....Storyboard AIConvert scripts into structured scene storyboards. Extract c...Image CompressorCompress JPEG, PNG, and WebP images locally. Real-time file ...JSON FormatterFormat, beautify, and validate JSON data. Compact/minify JSO...Merge PDFCombine two PDF files into a single document client-side. Fa...Loan EMI CalculatorCalculate monthly loan EMI payments, total interest payable,...Meta Tag GeneratorGenerate standard HTML meta tags for SEO. Set page title, de...AI Prompt FormatterFormat raw prompts into system, user, and assistant message ...

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pdf🔒 100% Client-Side⚡ No Upload Required

Watermark PDF

Overlay custom watermark text (e.g. DRAFT, CONFIDENTIAL) on top of every page of a PDF client-side.

PDF Tools Suite

PDF Viewer & Live Editor Merge PDF Split PDF by Range Compress PDF Rotate PDF Pages Extract PDF Pages PDF to Image Converter Images to PDF Converter PDF Metadata Editor Unlock PDF (Decrypt)Watermark PDF

Workspace Inputs

Select PDF File

Click or drop file here

Watermark Text

Result / Output

Watermarked PDF File

File preview will appear here...

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What is Watermark PDF?

PDF watermarking draws a text run block on top of page content streams, configuring transparent alpha values to keep backgrounds visible.

Overlay semi-transparent text blocks on PDF files.

How to use the Watermark PDF

1Upload PDF.
2Enter watermark text (e.g. DRAFT).
3Download watermarked file.

Frequently Asked Questions

Can I customize the opacity?

Yes, the watermark uses 35% opacity by default to ensure page text is readable.

Related Tools

Compress PDF

Optimize and reduce the file size of PDF documents client-side. Strips redundant metadata and compresses content streams.

PDF Viewer & Live Editor

100% private, client-side PDF viewer and live vector editor. Annotate with text, highlight, draw, shapes, signatures, and page management.

Merge PDF

Combine two PDF files into a single document client-side. Fast, secure, and offline.

Split PDF by Range

Split a PDF document into smaller files. Specify page ranges (e.g. 1-3, 5) to extract locally.