Watermark PDF
15 toolsStamp text across every page of a PDF.
Runs in your browser — your files and text stay on your device
Everything you'd need a dedicated PDF app for — merging, splitting, compressing, converting to and from images, watermarking, page numbering, cropping, signing, and more — runs entirely client-side using JavaScript. Your documents are processed on your own device and never touch a server, so they're safe to use even with contracts, resumes, or other sensitive files.
MergeSplitDelete PagesExtract PagesReorder PagesRotateCropCompressWatermarkPage NumbersSignPDF → ImagesImages → PDFPDF → TextMetadata
How to use this tool
- 1Select the PDF you want to watermark.
- 2Type the watermark text and adjust opacity/size — the preview updates live.
- 3Click Add Watermark & Download — the diagonal text is stamped on every page.
Frequently asked questions
Can I use a logo image instead of text?
Not currently — this tool applies a text watermark. Image watermarking may be added later.
Is my PDF uploaded anywhere?
No, the watermark is stamped entirely in your browser.