Watermark PDF
Stamp text across the pages of a PDF — diagonal, straight or tiled, at the opacity you choose. Runs in your browser, so the document is never uploaded.
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Accepts .pdf · One file at a time · up to 150 MB each "Upload" and "download" here mean your browser reading a file from this device and writing one back to it. Nothing is sent to a server — open your browser's network panel and watch: no request carries your file.
FAQ
Can I use Chinese, Japanese or Arabic text?
Yes, and that is worth knowing because most tools built the obvious way cannot. A PDF has fourteen built-in fonts and all of them are Latin-only, so a library asked to draw 机密 has no glyph to draw and fails. Rather than embed a multi-megabyte CJK font for one word, we let your own device draw the text — it already has fonts for every script you can type — and place that as the stamp. Anything you can type, including emoji, comes out.
Is a watermark the same as protecting the file?
No, and anyone telling you otherwise is selling something. A watermark is an object drawn over the page; someone with a PDF editor can select it and delete it in a few clicks, on this file or on one from any other tool. What it does is mark provenance and intent — that a copy is a draft, or came from you — which is useful, and it is not access control. Real protection means encryption, which is a different thing and not something we do.
Does the watermark land the right way up on scanned pages?
Yes. This is the detail that catches tools out: PDF drawing coordinates ignore the rotation a page declares, so a stamp placed at the middle of a page a scanner marked sideways comes out sideways too. Every page here is measured in the frame you actually see, and the stamp is counter-rotated to match. Checked on a file whose four pages declare 0, 90, 180 and 270 degrees: all four came out identically placed.
Do bookmarks and form fields survive?
They do. Stamping edits the document you gave us and saves that same document back out, so the outline, the internal links and any fillable form all stay intact — the same reason rotating is safe. The tools that rebuild a document from copied pages, like merging and splitting, keep the bookmarks but lose the internal links.
How much larger does the file get?
Barely. The stamp is rasterised once and embedded once, then referenced by every page it appears on, so a two-page document and a two-hundred-page document pay almost the same cost. Measured: stamping all 33 pages of a 1.1 MB specification added 14 KB. Nothing already in the file is re-encoded, so the pages themselves are untouched.
Why does the stamp soften at very high zoom?
Because it is a picture of text rather than text, which is the price of supporting every script. It is drawn at four times the size it will occupy and scaled down, so at any normal viewing or printing size it is indistinguishable — but zoom far enough past 400% and the edges go soft where real text would stay crisp. Page numbers avoid this by being real text, since digits are covered by the built-in fonts.
PDF converter
- PDFtoWordRebuilds headings, paragraphs, ruled tables and pictures as an editable Word fileAI text recognition, on your device
- PDFtoJPGRenders each page as JPG; several pages come back as a ZIP
- JPGtoPDFWraps the image in a PDF page at its own size
- PDFtoPNGRenders each page as PNG; several pages come back as a ZIP
- PNGtoPDFWraps the image in a PDF page at its own size
- PDFtoTXTPulls out the text layer, or reads a scan on your deviceAI text recognition, on your device
- PDFtoExcelReads the tables back into rows and columns, one sheet per page
- PDFtoPowerPointOne slide per page, each a picture of it — the text is not editable
- PDFtoMarkdownRebuilds headings, paragraphs, bullets and ruled tables as Markdown textAI text recognition, on your device
- TXTtoPDFLays the text out on A4 pages and draws it — real text, not a picture
- CSVtoPDFLays the text out on A4 pages and draws it — real text, not a picture
PDF tools
- Merge PDFCombine several PDFs into one, in the order you choose.
- Split PDFCut one PDF into several — one file per page, one every few pages, or by the ranges you type.
- Compress PDFMake a PDF smaller by re-encoding the images inside it.
- OCR PDFRecognise the words on a scanned PDF and add an invisible text layer, so the file becomes searchable.AI text recognition, on your device
- Flatten PDFMake the values in a filled PDF form permanent, so they cannot be edited and every reader draws them the same way.
- Rotate PDFTurn sideways or upside-down pages the right way up and save the result.
- Crop PDFTrim the margins off a PDF and save the result.
- Remove PDF pagesDelete the pages you do not want and download what is left.
- Extract PDF pagesPull the pages you need into a new PDF and leave the rest behind.
- Reorder PDF pagesMove pages into the order you want and save the result.
- Sign PDFDraw or type your signature, drop it where it belongs on the page, and download the signed PDF.
- Add page numbersPut page numbers on a PDF — any corner, any starting number, on the pages you choose.
- Add PDF bookmarksBuild a PDF outline from the contents page, or from the headings when there is none.