How is this different from other online PDF tools?

Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.

Are my PDF files uploaded?

No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.

Can I verify that files are not uploaded?

Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.

Does this tool work offline?

Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.

What happens when I refresh the page?

Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.

Does this tool store my files?

No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.

Can this tool unlock password-protected PDFs?

No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.

What technologies does this tool use?

This tool uses client-side JavaScript and pdf-lib to draw a repeating text watermark across each page entirely within your browser — your files never leave your browser.

Does this tool use WebAssembly?

No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.

How do I add a repeating watermark across every page?

Choose a PDF from your device, type your watermark text (for example DRAFT or CONFIDENTIAL), then adjust the font size, opacity, rotation, and spacing fields. Select Apply and save the resulting copy, which is built locally in your browser and tiled diagonally across every page.

Why is my non-English watermark text rejected or showing an error?

The tool draws text with pdf-lib's built-in Helvetica font, which covers a basic Latin character set, so CJK characters, emoji, and some uncommon symbols cannot be encoded and will trigger an error. Stick to standard Latin letters, numbers, and common punctuation for the watermark text.

Can I change the watermark color, or just its opacity and angle?

The watermark is drawn in a fixed medium gray, so you can adjust its size, opacity (entered as a percentage), rotation angle, and the spacing between tiles, but not the color. Keep in mind the text sits on top of the existing page content and does not encrypt or lock the document.

Does the Tiled Watermark tool cost anything to use?

Tiled Watermark is completely free — no account, no sign-up, and no limit on how many PDFs you stamp with a repeating diagonal watermark. The tool runs entirely inside your browser using pdf-lib, so your documents stay on your device at all times and are never transmitted anywhere, and that is how it always will be.

Add a Repeating Watermark to a PDF Privately — Tile It Across Every Page

Select a PDF, type your watermark text, adjust size, opacity, rotation, and spacing, and download a copy tiled with that text — all locally in your browser.

Quick answer

What it does: Select a PDF, type your watermark text, adjust size, opacity, rotation, and spacing, and download a copy tiled with that text — all locally in your browser.
Free?: Yes — 100% free, no account or sign-up.
Files uploaded?: No — everything is processed in your browser.
Works offline?: Yes — once the page has loaded.
Best for: A legal team covers a draft contract with a repeating DRAFT watermark before circulating it for review.
Good to know: The built-in font supports basic Latin characters; non-Latin text (e.g. CJK) cannot be rendered.

How it works

Select a PDF file from your device using the file picker.
The file is read into browser memory — no data leaves your browser.
Type the watermark text and adjust the size, opacity, rotation, and spacing.
pdf-lib draws the text repeatedly in a diagonal grid across every page in your browser.
The watermarked PDF is offered as a download directly from your browser.

When to use this tool

A legal team covers a draft contract with a repeating DRAFT watermark before circulating it for review.
A company marks sensitive reports CONFIDENTIAL across every page so recipients see the status instantly.
A designer sends a client preview tiled with their studio name to deter unauthorized use.
The watermark is a drawn text layer, not encryption — it can be removed by editing the PDF structure. Non-Latin text (e.g. CJK) is not supported.

Frequently asked questions

How is this different from other online PDF tools?: Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.
Are my PDF files uploaded?: No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.
Can I verify that files are not uploaded?: Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.
Does this tool work offline?: Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.
What happens when I refresh the page?: Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.
Does this tool store my files?: No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.
Can this tool unlock password-protected PDFs?: No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.
What technologies does this tool use?: This tool uses client-side JavaScript and pdf-lib to draw a repeating text watermark across each page entirely within your browser — your files never leave your browser.
Does this tool use WebAssembly?: No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.
How do I add a repeating watermark across every page?: Choose a PDF from your device, type your watermark text (for example DRAFT or CONFIDENTIAL), then adjust the font size, opacity, rotation, and spacing fields. Select Apply and save the resulting copy, which is built locally in your browser and tiled diagonally across every page.
Why is my non-English watermark text rejected or showing an error?: The tool draws text with pdf-lib's built-in Helvetica font, which covers a basic Latin character set, so CJK characters, emoji, and some uncommon symbols cannot be encoded and will trigger an error. Stick to standard Latin letters, numbers, and common punctuation for the watermark text.
Can I change the watermark color, or just its opacity and angle?: The watermark is drawn in a fixed medium gray, so you can adjust its size, opacity (entered as a percentage), rotation angle, and the spacing between tiles, but not the color. Keep in mind the text sits on top of the existing page content and does not encrypt or lock the document.
Does the Tiled Watermark tool cost anything to use?: Tiled Watermark is completely free — no account, no sign-up, and no limit on how many PDFs you stamp with a repeating diagonal watermark. The tool runs entirely inside your browser using pdf-lib, so your documents stay on your device at all times and are never transmitted anywhere, and that is how it always will be.