body{margin:0;background:#fdfdfb;color:#111110;font-family:Georgia,"Times New Roman",serif}.ns{max-width:960px;margin:0 auto;padding:32px 24px 64px}.ns-nav{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid #e5e5df;font-family:ui-monospace,monospace;font-size:13px}.ns-nav a{color:#111110;text-decoration:none;margin-left:20px}.ns h1{font-size:44px;line-height:1.1;margin:72px 0 20px;font-weight:600}.ns p{font-size:17px;line-height:1.65;color:#52524f;max-width:640px;font-family:-apple-system,"Segoe UI",sans-serif}.ns h2{font-size:26px;margin:56px 0 12px;font-weight:600}.ns ul{font-family:-apple-system,"Segoe UI",sans-serif;color:#52524f;font-size:15px;line-height:2;padding-left:20px}.ns .ns-cta{display:inline-block;margin-top:28px;background:#111110;color:#fdfdfb;border-radius:999px;padding:13px 26px;font-family:-apple-system,"Segoe UI",sans-serif;font-size:15px;text-decoration:none}.ns .ns-note{font-family:ui-monospace,monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:#6e6e68;margin-top:64px}

Deal documents, done in seconds.

Sixteen PDF engines for M&A and legal teams: compress to exact sizes, merge, redact permanently, protect, convert, edit, sign and invoice. Files are processed in memory and never stored — your first conversion is free, right on this page.

See plans — every one starts with a free trial

The engines

Compress — shrink PDFs to exact target sizes, text stays selectable
Merge — combine PDFs in the order you choose
Redact — permanent, burn-in redaction of text and regions
Protect & Unlock — AES-256 passwords, added or removed
Convert — images to PDF, PDF to PNG/JPG, PDF to Word
Organize, rotate, watermark, scrub metadata, extract text
Edit — place and drag text directly on the page
Sign — draw or type your signature, place it anywhere, download signed and dated
Invoice — client-ready invoices you can download or email

Pricing

Independent — $5/month, 20 conversions, 15MB per file, 7-day free trial
Professional — $50/month, unlimited conversions, 50MB per file, 14-day free trial
Enterprise — custom volume and governance, talk to sales

Subscribing and the live tool require JavaScript. Everything above is the product summary.

Doclyx — zero file retention · Stripe-secured billing · AES-256

Sign in Choose plan

Add Watermark to PDF

Stamp every page with a subtle diagonal watermark — visible enough to deter leaks, light enough to stay readable.

First conversion free No account needed Files never stored

Doclyx — First run freeFiles never stored

Drop files to begin

PDF documents accepted · Max 10MB · Files never stored

First conversion free — no account needed

How it works

01

Drop your PDF onto the tool

02

Type your watermark text — CONFIDENTIAL, DRAFT, a client name

03

Download the stamped document

Common questions

Can I customize the watermark text?

Yes — any short text works. Common choices are CONFIDENTIAL, DRAFT, or the recipient's name for leak deterrence.

Does the watermark cover the content?

The stamp is placed diagonally at low visual weight — readable content stays readable.

Is watermarking free?

The first run is free with no account. Regular use starts at $5/month.

Related tools

Redact PDF

Permanently redact PDF text and regions — blackout boxes or exact-phrase search, burned into the file forever.

Password Protect PDF

Encrypt a PDF with bank-grade AES-256 so it only opens with your password.

Edit PDF

Edit a PDF directly: place new text anywhere on a page, rotate individual pages, and delete pages you don't need.