A lawyer friend of mine shares draft contracts with clients over email. Standard stuff. Except one time a client took the draft — which wasn’t finalized yet — and used it as the final version. Signed it, sent it to the other party, the whole thing. Missing clauses, wrong dates, everything. It became a mess.
After that he started putting “DRAFT” across every page of every document that isn’t final. Big diagonal text, impossible to miss. Now nobody confuses a draft for the real thing. He asked me how to do it without Acrobat because his firm doesn’t have licenses for everyone. I showed him and it took about 15 seconds.
How to add a watermark to a PDF
Go to convertkr.com/pdf-watermark. Upload your PDF. Type whatever you want as the watermark. Download.
You can customize a few things:
The text. Most people use DRAFT, CONFIDENTIAL, or COPY. But you can type anything. A company name, “FOR REVIEW ONLY”, “SAMPLE”, your name — whatever makes sense for your situation. My lawyer friend uses “DRAFT — NOT FOR EXECUTION” which is very lawyer of him.
Position. Diagonal is the default and honestly the best. It goes corner to corner across the page so nobody can crop it out or miss it. You can also do center, top, or bottom if you want something less aggressive. But for protection purposes, diagonal is the way to go.
Opacity. This is how see-through the watermark is. Low opacity means you can barely see it — the document is still very readable. High opacity makes the watermark really bold but harder to read the content underneath. I usually go around 25-35%. You can see the watermark clearly but it doesn’t interfere with reading the document.
Font size. Depends on the document. For A4 pages, 48pt works well. For smaller pages or if you want something subtle, drop it to 36. If you want it really in your face, go 64 or higher.
Color. Red for CONFIDENTIAL or DRAFT looks official. Gray is more subtle and professional. Black works but can make the text hard to read if the document also has black text. I’d say red for important warnings, gray for everything else.
Oh and it also supports Urdu text. My uncle adds Urdu watermarks to his notes. I didn’t think anyone would use that feature but he does almost weekly.
When people actually use this
Draft documents. The lawyer situation. Any time you’re sharing something that isn’t final — a proposal, a contract, a report — slap DRAFT on it. Protects you if someone acts on an unfinished version. My friend at the marketing agency does this with client proposals too. Big “DRAFT” across every page until the client approves.
Confidential stuff. HR documents, salary information, internal reports. A friend works in HR and whenever she prints documents with employee information, she adds “CONFIDENTIAL” first. If someone leaves a printout on a desk, at least it’s clearly marked as sensitive.
Sample or preview documents. If you sell templates, ebooks, reports — anything digital — you might want to share a preview with a watermark. People can see the content but they need to buy the actual version. A teacher I know sells his notes online and shares watermarked previews on Telegram for free. The paid version has no watermark.
Copies for records. When you give someone a copy of a document and want to make it clear it’s a copy, not the original. “COPY” watermark. Government offices do this. My dad had to submit copies of his property papers for something and the office asked that copies be clearly marked. I added a light “COPY” watermark and they accepted it.
Internal use only. Company documents that shouldn’t leave the organization. “INTERNAL USE ONLY” or “DO NOT DISTRIBUTE.” I’ve done this for a friend who was worried about his company’s pricing document leaking to competitors.
The Urdu watermark thing
Okay this might be a niche feature but it matters here. Most PDF watermark tools only support English text because they use standard fonts. ConvertKr has the Nastaliq font built in so you can type Urdu text and it renders properly — right to left, proper letter joining, the whole thing.
My uncle uses it for his educational notes. He adds his name and institute name in Urdu across every page. It looks proper. Not like those broken Urdu characters you get when a tool doesn’t have the right font.
If you don’t need Urdu, just leave it on “Standard” font and it uses Helvetica which works for English and most other languages.
Things to keep in mind
Watermark the FINAL version. If you’re going to make more edits to the document, wait until you’re done. Don’t watermark, then realize you need to change page 7, then have to redo the watermark. Finish editing first, watermark last.
Keep an unwatermarked copy. This is important. The watermark is permanent once applied — it’s baked into the PDF. You can’t remove it later. So always keep the original clean version. Watermark a copy, not the original.
Watermarks don’t prevent copying. Someone can still screenshot every page, or use OCR to extract the text behind the watermark. A watermark is a deterrent, not a lock. It stops casual misuse — someone accidentally treating a draft as final, or someone lazily reposting your content. It won’t stop someone who’s determined. But for day to day use it’s more than enough.
Print preview first. If you’re going to print the watermarked document, check a page or two first. Sometimes the watermark that looks perfect on screen is too dark or too light when printed. Depends on your printer. Adjust opacity if needed.
FAQ
Can I watermark specific pages only?
The tool adds the watermark to all pages. If you only want certain pages watermarked, split the PDF first, watermark those pages, then merge everything back together. Takes an extra minute but it works.
Can I add an image or logo as a watermark?
Text only right now. For most use cases — DRAFT, CONFIDENTIAL, your name — text is all you need. Logo watermarks might come later.
Will the watermark cover the text in my document?
The watermark sits on top of the content but at low opacity (25-35%) the document text is still completely readable. Think of it like looking through tinted glass — you can see everything, there’s just a tint over it.
Is the watermark permanent?
Yes. Once applied, it’s part of the PDF. There’s no “remove watermark” button. That’s the point — if it were easy to remove, it wouldn’t serve its purpose. Always keep the unwatermarked original.
Need to watermark a PDF? Open the watermark tool — upload, type your text, adjust settings, download.