How to Add a Watermark to PDF Free in 2026 (7 Tools Tested)

Adding a watermark to a PDF sounds like something you’d need Adobe Acrobat for. You don’t. I tested 14 tools over the past two weeks – free online services, desktop apps, even command-line options – and narrowed it down to 7 that actually work without charging you or butchering your file layout.

Whether you need a “DRAFT” stamp on a contract, your company logo on a report, or a “CONFIDENTIAL” tag across every page of a 200-page document, these tools handle it. Some let you do text watermarks, some do image watermarks, and a few do both. If you’re working with PDFs regularly, you might also want to check our roundup of the best free PDF editors for a more complete editing toolkit.

Quick Comparison Table

Tool	Text Watermark	Image Watermark	Batch	File Size Limit	Platform	Best For
iLovePDF	Yes	Yes	Yes	25 MB free	Web, Desktop	Easiest overall experience
PDF24	Yes	Yes	Yes	No limit	Web, Windows	No restrictions at all
Sejda	Yes	Yes	Yes (3/hr)	50 MB / 200 pages	Web, Desktop	Precise positioning control
PDFCandy	Yes	No	No	44 MB	Web	Quick text watermarks
SmallPDF	Yes	Yes	No	5 MB free	Web	Clean interface, occasional use
LibreOffice Draw	Yes	Yes	Via macro	No limit	Win/Mac/Linux	Offline, full control
qpdf + cpdf (CLI)	Yes	Yes	Scripted	No limit	Win/Mac/Linux	Developers, automation

1. iLovePDF – Best Overall Free Option

iLovePDF has become my default recommendation for most PDF tasks, and watermarking is no exception. The interface takes about 10 seconds to figure out: upload your PDF, choose text or image watermark, adjust position and opacity, download.

What I liked

• Both text and image watermarks supported
• You can set opacity from 0 to 100% (I usually go with 25-30% for a subtle look)
• Rotation angle is adjustable – the diagonal “DRAFT” look is one click
• Batch processing works on free tier – I tested it with 5 files at once
• Output quality stayed identical to the original in every test I ran

What could be better

• Free tier caps at 25 MB per file – if you’re dealing with heavy design PDFs, you’ll hit this
• Font selection is limited to about 8 options
• No way to watermark only specific pages on the free plan

Free tier limits: 25 MB file size, 1 task at a time, basic font selection. Premium is $7/month if you need more.

2. PDF24 – Completely Free, No Limits

PDF24 is the tool I keep coming back to when I need to process large files or lots of them. It’s genuinely free with no file size restrictions, no daily limits, and no registration required. The German company behind it makes money from their business tools, so the consumer product stays free.

What I liked

• Truly unlimited – I watermarked a 140 MB technical manual without issues
• Text watermarks with custom font, size, color, rotation
• Image watermarks with transparency controls
• Files are processed and deleted from their servers after 1 hour
• Desktop app available for Windows if you prefer offline

What could be better

• The interface looks dated compared to iLovePDF or SmallPDF
• Preview rendering can be slow on larger files
• No macOS desktop app – it’s web or Windows only

Price: Completely free. No premium tier for the watermark tool. If you need a full-featured PDF suite, check our guide on how to edit PDFs without Adobe for more options.

3. Sejda – Best for Precise Placement

Sejda gives you the most granular control over watermark positioning of any free tool I tested. You can set exact X/Y coordinates, layer order (over or under content), and apply watermarks to specific page ranges. The “apply to pages 1,3,5-10” syntax is something most competitors lock behind a paywall.

What I liked

• Page range selection on free tier – huge for contracts where you only watermark certain sections
• Above or below content layer control
• Both text and image watermarks with full positioning
• 50 MB and 200-page limit is generous for free

What could be better

• 3 tasks per hour limit on free – enough for personal use, annoying for batch work
• Files expire after 2 hours
• The interface has too many options visible at once, which can feel overwhelming at first

Free tier limits: 3 tasks/hour, 50 MB, 200 pages max. Pro at $7.50/month for unlimited.

4. PDFCandy – Fastest for Simple Text Watermarks

If all you need is a text watermark and you need it in 30 seconds, PDFCandy is the tool. The stripped-down interface skips the bells and whistles. Upload, type your text, pick a color, done.

What I liked

• Genuinely the fastest workflow I tested – three clicks from upload to download
• No account required
• Clean output with no added metadata or compression artifacts

What could be better

• No image watermark option at all
• Limited formatting – you get font size and color, that’s about it
• No batch processing
• 44 MB file limit

Free tier limits: 1 task at a time, 44 MB file limit, text watermarks only.

5. SmallPDF – Best Interface, Tight Free Limits

SmallPDF has the most polished UI of any PDF tool online. The watermark feature works well – you get a visual drag-and-drop editor where you position your watermark exactly where you want it on the page. The catch is the free tier is quite restrictive.

What I liked

• Drag-and-drop watermark placement on a visual preview
• Both text and image watermarks
• The preview updates in real-time as you adjust opacity and position

What could be better

• Free tier only allows 2 tasks per day – this is the tightest limit of any tool here
• 5 MB file limit on free is very low
• Pushes you toward the $12/month Pro plan constantly

Free tier limits: 2 tasks/day, 5 MB file size. Pro at $12/month.

6. LibreOffice Draw – Best Free Offline Option

Here’s the thing about online tools: they require uploading your files to someone else’s server. If you’re watermarking confidential contracts or legal documents, that might not fly. LibreOffice Draw opens PDFs natively and lets you add watermarks without any file ever leaving your machine.

How to add a watermark in LibreOffice Draw

1. Open your PDF in LibreOffice Draw (File > Open)
2. Go to Insert > Text Box for text watermarks, or Insert > Image for logo watermarks
3. Position and resize your watermark element
4. Right-click the element > Area > Transparency tab > set to 70-80% for a subtle watermark
5. Export as PDF (File > Export as PDF)

What I liked

• Completely offline – your files stay on your machine
• No limits on file size, page count, or usage
• Full control over every aspect of the watermark
• Can batch-process with LibreOffice macros if you’re comfortable with Basic

What could be better

• Complex PDFs sometimes render with slight layout shifts
• The workflow takes 5-10 minutes vs. 30 seconds with online tools
• You need to install a 300+ MB application

Price: Free and open source. Works on Windows, macOS, and Linux.

7. qpdf + cpdf (Command Line) – Best for Developers and Automation

If you’re processing hundreds of PDFs or need watermarking as part of an automated pipeline, command-line tools are the way to go. I use a combination of qpdf for PDF manipulation and cpdf (Coherent PDF) for the actual watermark stamping.

Quick example

# Add text watermark with cpdf
cpdf -add-text "CONFIDENTIAL" -font "Helvetica" -font-size 60 \
  -color "0.8 0.8 0.8" -midline -diagonal input.pdf -o output.pdf

# Stamp an image/PDF overlay on every page
cpdf -stamp-on watermark.pdf input.pdf -o output.pdf

What I liked

• Process thousands of files in a single script
• Integrate into CI/CD pipelines, document management systems, or cron jobs
• Full control over every parameter
• No file size limits, no internet needed

What could be better

• Not for non-technical users – you need to be comfortable with terminal
• cpdf community edition has some limitations (adds a small watermark of its own on commercial use)
• No visual preview – you’re working blind until you open the output

Price: qpdf is free and open source. cpdf community edition is free for non-commercial use; commercial license starts at $150.

Which Tool Should You Pick?

Honestly, it depends on two things: how many PDFs you’re dealing with, and whether you care about uploading files to external servers.

For most people, iLovePDF or PDF24 will handle everything. iLovePDF has the better interface; PDF24 has no limits at all. If you’re watermarking sensitive documents, go with LibreOffice Draw and keep everything local. And if you’re a developer building document workflows, cpdf is hard to beat.

One thing worth noting: if you’ve already watermarked a PDF and need to remove it later, we have a separate guide on how to remove watermarks from PDFs for free.

Tips for Effective PDF Watermarks

After adding watermarks to probably 200+ test files over the past couple of weeks, here are some things I learned the hard way:

• Opacity matters more than size. A massive watermark at 15-20% opacity looks professional. A small watermark at 100% opacity looks like a mistake. I settled on 25% as my default for text watermarks.
• Diagonal placement reads better than horizontal for text watermarks like “DRAFT” or “CONFIDENTIAL”. Something about the 45-degree angle makes it clear this is intentional.
• Use PNG with transparency for image/logo watermarks. JPGs create an opaque rectangle behind your logo, which looks terrible on document pages with text.
• Test on a single page first. Every tool handles positioning slightly differently, and you don’t want to discover your watermark covers important content after processing a 500-page file.
• Check the output file size. Some tools recompress images during watermarking, which can balloon a 2 MB PDF to 15 MB. PDF24 and qpdf generally preserve the original size best.

FAQ

Can I add a watermark to a PDF without Adobe Acrobat?

Yes. Tools like iLovePDF, PDF24, and Sejda let you add both text and image watermarks to any PDF for free, directly in your browser. No Adobe subscription needed. LibreOffice Draw is a free desktop alternative if you prefer working offline.

How do I add a logo watermark to every page of a PDF?

Upload your PDF to iLovePDF or PDF24, select “Image watermark,” upload your logo (PNG with transparency works best), set the opacity to 20-30%, and choose “Apply to all pages.” The process takes under a minute for most files.

Is it safe to upload PDFs to online watermark tools?

Most reputable tools like iLovePDF, PDF24, and Sejda delete files within 1-2 hours. But if you’re working with confidential, legal, or financial documents, use LibreOffice Draw or cpdf instead – both work entirely offline with no data leaving your machine.

Can I add a watermark to specific pages only?

Sejda offers page range selection on its free tier (e.g., pages 1,3,5-10). Most other free tools apply the watermark to all pages. For selective watermarking without limits, LibreOffice Draw or cpdf give you full page-by-page control.

What’s the difference between a text watermark and an image watermark?

A text watermark uses typed words like “DRAFT,” “CONFIDENTIAL,” or “SAMPLE” rendered directly onto the PDF. An image watermark uses a graphic file – typically a company logo or custom stamp. Text watermarks are faster to create; image watermarks look more branded and professional.