英文指南 — 本文为英文撰写。界面语言会跟随您的设置。
Watermark PDF Free — No Sign Up, Text or Logo Online
Add watermark to PDF free with no sign up. Stamp DRAFT or a logo — no login, no FileLumo watermark on download.
By FileLumo Editorial Team
FileLumo product and content team · Updated
The FileLumo team builds privacy-first document workflows and writes practical guides for everyday PDF, file conversion, and document safety tasks.
Free · No signup · No watermark · We don't store your files
Searches for add watermark to PDF free and stamp PDF confidential stay strong for freelancers and legal teams. FileLumo’s Watermark PDF tool works with no sign up.
Text vs logo
Use short uppercase labels for legal packs. Prefer PNG logos with transparency. Watermark after merge/sign so one final branded file goes out.
How to watermark PDF free (no signup)
Step 1: Open Watermark PDF.
Step 2: Upload your PDF.
Step 3: Add text and/or a logo; set opacity.
Step 4: Apply and download — no account.
Step 5: Optionally password protect for branded locked shares.
Free · No signup · No watermark · We don't store your files
Related
Also see add watermark to PDF online and Sign PDF for approvals on branded drafts.
Frequently Asked Questions
Can I add a watermark to PDF free with no sign up?
Yes. FileLumo watermarking is free online with no account on the standard path.
Text or logo watermark?
Both. Text is fastest for DRAFT/CONFIDENTIAL. Logo brands every page with your mark.
Does a watermark lock the file?
No. It brands pages. Use Password Protect when the PDF must stay closed without a password.
Will it cover my content?
Opacity controls visibility. Start lighter so body text stays readable.
Is there a FileLumo watermark?
No. Your download does not get an extra FileLumo mark on the free path.
Free · No signup · No watermark · We don't store your files
准备好按本指南操作时，请打开上方工具。上传使用 TLS，无需账户，我们不保存您的文件。请下载结果以保留副本。完整说明见隐私政策。