Add Watermark to PDF

A watermark turns a plain PDF into a document with a clear status and an owner. Sometimes that means a bold CONFIDENTIAL diagonal across every page; sometimes it is a faint DRAFT so reviewers know the file is not final; sometimes it is your company logo sitting quietly in a corner so anyone who shares the file still sees where it came from. Toolghar's Add Watermark tool covers all of those: load a PDF, design the overlay you need, and download a copy with the mark baked into the pages.

You are not limited to a single fixed style. Choose a text watermark and type whatever the document needs, or switch to an image watermark and drop in a logo or signature graphic. Then shape it precisely — pick the font family, size and weight for text, set how see-through it is with an opacity control, rotate it to any angle, place it where it belongs on the page, and choose its colour so it reads against your content without burying it.

Because the whole job runs inside the page you are reading, the PDF never travels to a server. That matters for the documents people most often watermark — contracts, proposals, design proofs, internal reports — which are exactly the files you do not want to hand to an unfamiliar online service just to add a stamp. Here the mark is applied locally and the original stays on your device.

The first benefit is control over how the mark looks. Instead of a one-size watermark forced onto every page, you decide the wording or image, the font and weight, how faint or bold it is, the angle, the colour, and whether it appears once or tiles across the sheet. The result reads the way you intended rather than fighting with the content beneath it.

The second benefit is privacy. Watermarking is usually a step you take precisely because a document is sensitive — a contract going out for signature, a design proof sent to a client, an internal report you do not want leaking without attribution. Doing it locally means none of that content is exposed to a third-party server; the bytes never leave the hardware you control.

The third benefit is precision and reversibility of intent. Because you target an exact page range and preview the look first, you can mark only the pages that need it and leave the rest untouched. Your original file stays on your device, so if you want a different style you simply adjust the settings and stamp a fresh copy.

Businesses send proposals and quotes that should not be passed off as final or forwarded without context. A faint DRAFT or a dated company name across the pages signals the document's status and keeps an early version from being mistaken for the signed one.

Designers and agencies share proofs and mock-ups with clients before payment. A tiled watermark of the studio name makes the preview clearly a preview — visible enough to discourage anyone from lifting the artwork, faint enough to still judge the work.

Legal and HR teams circulate contracts, policies and offer letters that need a CONFIDENTIAL marking so recipients understand the handling expectations. Targeting the watermark to the relevant pages keeps signature pages and exhibits looking the way they should.

Individuals protect documents they must hand over — a scanned ID, a bank statement, a certificate — by stamping the specific purpose across them, such as the name of the service they are submitting it to, so a copy cannot easily be reused elsewhere.

Many online watermarkers force you to upload your file, create an account, or accept a cap on how many documents you can stamp per day. Toolghar takes the opposite approach: the watermark is applied locally, there is no login, and there is no artificial limit beyond your device's own memory.

It is also built for genuine control rather than a single preset. Text or image, font family and weight, opacity, rotation, colour, position, tiling, and an exact page range are all yours to set, and a live preview shows the combined effect before anything is written. That means you get the look right the first time instead of downloading, checking, and re-stamping.

And it stays consistent with the rest of Toolghar — the same clean interface, keyboard-friendly controls, and dark-mode support — so it feels familiar from the first use rather than like a bolted-on utility.

Every step of the watermarking happens in your browser. When you add a PDF, its bytes are read into the page's memory and handled by libraries that ship with the application itself — there is no background upload and no copy stored on a server.

Because the processing is local, the privacy guarantee is structural rather than a promise: there is simply no network request that carries your document anywhere. That is what makes the tool appropriate for the kinds of files people most often need to mark — contracts, proposals, proofs and confidential reports — which you should not hand to an unfamiliar service just to add an overlay.

It is worth understanding what the tool produces. The watermark is drawn directly onto the targeted pages and saved into a new copy of the PDF, so the mark becomes part of those pages rather than a separate layer that can be toggled off. Your original file is untouched on your device; if you want a different wording, colour or angle, you adjust the settings and stamp a fresh copy from the original.

Match the opacity to the job. A status mark like DRAFT or CONFIDENTIAL should be faint enough to read the text underneath, while a copyright or ownership stamp on a proof can be bolder. Start low and raise it only until the mark is clearly visible without burying the content.

Use rotation and position together. A diagonal, centred watermark covers the most area and is the hardest to ignore; a small horizontal mark in a corner stays out of the way of headers and footers. Pick the combination that suits whether you are protecting the page or simply labelling it.

Turn on tiling when you want protection, not just a label. For client proofs and previews, a repeating pattern is far more effective than a single stamp because it cannot be cropped away, and a lower opacity keeps the tiled grid from overwhelming the artwork.

Target the pages that matter. If only the cover or a particular section needs marking, set a page range instead of stamping everything. And always glance at the live preview before downloading so the colour and size read clearly against your specific document.

A common question is how to choose a colour that shows up without dominating the page. A neutral grey works well for most documents because it reads against both light backgrounds and darker images, while a brand colour can be used at a lower opacity when the watermark is also acting as light branding. The live preview is the quickest way to confirm the colour reads on your actual content.

People also ask whether a watermark can be removed later. Because the mark is drawn into the saved pages rather than stored as a removable layer, it is part of the document once you download it. That is intentional — it is what makes the mark stick when the file is shared — so keep your original unmarked file if you expect to need a clean version again.

Another frequent question is about which font size to use. The right size depends on the page and the wording: a single short word like DRAFT can be large and diagonal across the sheet, while a longer line or a logo usually looks better smaller and positioned to one side. Adjust the size and weight together and check the preview rather than guessing.

Under the hood, the PDF you add is parsed in the browser and the tool draws your watermark directly onto each targeted page. For a text watermark it embeds the chosen font and renders the text at the size, weight, colour, opacity and rotation you set; for an image watermark it embeds the supplied graphic and places it with the same opacity, rotation and position controls. The mark is composited on top of the existing page content, which is left intact underneath.

Position, rotation and tiling are computed against each page's own dimensions, so the watermark lands consistently whether pages are portrait, landscape, or mixed sizes. When the repeat pattern is enabled, the tool lays the mark out in a grid across the page rather than drawing it once. Page-range targeting is applied by index, so only the pages you selected receive the overlay and every other page is written through unchanged.

The libraries that read and rewrite the document are bundled with the application and loaded on demand through dynamic imports — never fetched from a third-party CDN at runtime. The result is a new PDF with the watermark baked into the chosen pages while your original file remains untouched on your device, ready to be re-stamped with different settings whenever you need a different look.