Free online PDF watermark tool that stamps a text label across every page, with color, opacity, size, angle and position set by hand. The original file stays as it was.
Document format work by OnlinePCApps since 2013
Every one of these carries a meaning the page itself does not state. A PDF watermark says it on every page at once.
A version still being worked on can be mistaken for the final one. A DRAFT or CONFIDENTIAL label across every page makes the status plain and lowers the chance of the wrong copy being acted on.
A proposal or a report sent to a client reads as anonymous without a name on it. A faint company name in a corner, or across the center at a low opacity, ties the document to its source and looks considered.
A preview or a sample shared widely can be passed on as though it were free to take. A SAMPLE or COPY mark across the center of the page states ownership and is awkward to crop away.
Drop a PDF up to 100 MB onto the panel above, or click to browse. A Pages Loaded badge shows the count once the file is read, with a Change file button beside it.
Type a label or select a preset, CONFIDENTIAL, DRAFT, SAMPLE, FINAL or COPY. Set the color, opacity, font size, angle and position, then choose all pages, the first page or a custom range.
Click Apply Watermark, then Download watermarked PDF. watermarked.pdf comes down with the label drawn in, and the source PDF stays as it was, a clean master for later.
A PDF watermark is a text label painted over every page. The control over how it looks is what keeps it readable without hiding the content.
A typed label is what the online PDF watermark tool draws, and five presets sit under the box: CONFIDENTIAL, DRAFT, SAMPLE, FINAL and COPY. Type a company name, a date or a case number where a preset does not fit.
A color picker sets the ink, slate gray by default. Opacity runs in five steps from 10 to 100 percent and Font Size from 24 to 80 px, so the mark shows without hiding the content.
Four angles: -45 for the classic diagonal, +45 for the reverse, 0 for horizontal and 90 for vertical. Seven positions, the center or any of six corner and edge spots, so a corner suits subtle branding and the center suits a stamp.
The mark covers all pages, the first page alone or a custom range typed as 1, 3-5, so a cover can stay clean while the body pages carry the label.
Adding a PDF watermark and stamping a document name the same action. The online PDF watermark tool draws the mark into a new copy named watermarked.pdf and leaves the source untouched.
Both stamp a label onto a PDF. The difference is where the file goes, what kind of mark goes on and how many can be done at once.
| Point of comparison | This tool This PDF watermark tool Stamped on the device | Hosted markers Uploaded and stamped on a server |
|---|---|---|
| Where the file goes | Held on the device | Sent off to a server |
| Text and image marks | Text, with five presets | Usually both |
| A mark of their own added | Never, only the mark set | Some stamp a free-tier tag |
| Entire libraries at once | One file in the browser | Batch on their hardware |
| Lock it right after | A separate step | Often chained in one flow |
Those two rows at the bottom are where a hosted service earns its upload. Marking an entire library at once fits a server, and a hosted suite can stamp then lock in a single pass. Everywhere else the browser wins, and the document stays on the machine.
Drawing a label onto a page is a small edit the browser makes on the file it already holds. There is no processing that needs a server, so the mark is added on the device with nothing sent out.
The file is never received, so there is no stored copy to guard and no retention policy to take on trust. A contract stamped as CONFIDENTIAL never has to leave the machine to earn the label.
A PDF watermark is a set of choices about what the mark says and how it sits on the page, drawn into the page the way a PDF stores text. These are the controls behind it.
| Setting | Range | What it decides |
|---|---|---|
| Text | typed or a preset | A typed label carries a status or a name. Five presets fill the box in one click: CONFIDENTIAL, DRAFT, SAMPLE, FINAL and COPY. An image or logo is not an option on this page. |
| Opacity | 10% to 100% | Five steps: 10 percent very subtle, 20 percent standard, 40 percent medium, 70 percent prominent and 100 percent solid. A low value keeps body text readable, while a high value makes the mark the first thing seen. |
| Angle | -45, +45, 0 or 90 | The tilt of the mark. -45 degrees is the classic diagonal stamp that avoids lining up with the text, +45 runs the reverse way, 0 is horizontal and 90 is vertical. |
| Position | seven spots | Where the mark sits. Center (Diagonal) covers the most area, and the six corner and edge spots, top and bottom at left, center and right, are subtler but easier to crop off. |
| Color | any value | A color picker, slate gray by default. Gray gives a quiet label, red a warning and a brand blue a signature of the company behind the file. |
| Font size | 24 to 80 px | Five sizes: 24 small, 32 medium, 42 standard, 60 large and 80 extra large. A big size suits one word like DRAFT across the center, a small one suits a company name in a corner. |
| Pages | all, first or custom | All pages, the first page alone or a custom set typed as page numbers and ranges separated by commas, 1, 3-5, so sensitive pages carry the label and a cover can stay clean. |
| Font | one fixed face | The typeface is fixed by the online PDF watermark tool. Size, color, opacity and angle are the levers that set how the label looks. |
| Output | watermarked.pdf | A new copy named watermarked.pdf is written for download. The source file is not altered, so the same document can be stamped a different way later. |
| File size | a few kilobytes | A text mark adds a few kilobytes across the entire file, since the label is drawn as page content rather than stored as a picture. |
A Label, Not a Lock
An online PDF watermark is drawn onto the page as ordinary content. It states a status, carries a brand and deters casual reuse, but it does not encrypt anything. A determined reader can crop or strip a mark, which is why a centered diagonal is harder to remove than a corner. It is also why a document that must stay shut needs a password as well. A stamped copy headed for an archive raises a second question, what PDF/A is and when it is needed. The standards below define the page content a mark is drawn into.
Every one of these stamps a page. They differ from the online PDF watermark tool in the control they offer and whether they run on the device.
All four keep the file on the computer it opened on, unlike hosted markers that ask for an upload. The tool above does the same.
A PDF watermark is easy to overdo or to make pointless. These three checks keep the online PDF watermark tool useful.
The 20 percent standard step reads clearly while the text underneath stays legible, and 40 percent is the ceiling for a body page. Push it to 70 or 100 and the watermark starts to fight the content it sits on.
A corner mark is subtle but simple to crop away. The Center (Diagonal) position at -45 degrees covers the content and is far harder to remove without taking the page with it. From then on the mark is page content, part of what a PDF keeps after an edit.
A watermark labels and deters, but it can be removed by someone set on it. When a file truly must be protected, add a password as well so the content cannot be opened or copied freely.
The online PDF watermark tool marks one document per run. A library of contracts, or a batch where every file carries a name for tracking, is work for the desktop edition, which reads from disk and stamps every file in one pass.
Point it at a directory and every PDF inside is stamped with the same text or logo in one pass.
Every copy can carry a recipient name or a date, which marks who a document was sent to for tracking.
A saved stamp marks a folder on a schedule, which suits a set of documents that goes out every week.
Free, with no sign-up and no forced mark. The online PDF watermark tool stamps the label and leaves the original file untouched.