WalkingPDF

Watermark a PDF

Upload a PDF, choose one of five watermark styles and download the marked copy. The job takes about a minute, needs no account and nothing to install, and the file you upload is deleted from our servers automatically within the hour. Text, logo, confidential, draft and footer marks are all covered, and the free tier accepts files up to 100 MB and 300 pages.

1 Upload the PDF

Drop your PDF here or browse

Free tier: up to 100 MB and 300 pages. Files are deleted automatically within 120 minutes.

How it works

  1. Upload the PDF

    Drop the file in or choose it from your device. Nothing is installed and no account is created.

  2. Pick a style

    Diagonal for a status mark, Behind the text for branding, Footer for a line at the bottom, Image for a logo, Tiled for a pattern.

  3. Set the wording and opacity

    Type the text, choose a colour, and set how strongly it shows. About 30% is right for most documents.

  4. Choose the pages

    Mark every page, or only the pages you select.

  5. Download

    Click Add watermark and keep the marked copy. The upload is deleted automatically within the hour.

Five styles, six jobs

Which watermark style does what
StyleWhat it is forTypical wording
DiagonalA status mark across the page that cannot be missedCONFIDENTIAL, DRAFT, COPY
Behind the textBranding or a notice that sits under the contentCompany name, REVIEW COPY
FooterA quiet line at the bottom of every pageCompany name, page reference, contact details
ImageA logo, stamp or signature as a pictureYour logo, a certification stamp
TiledA repeating pattern that is hard to crop awayUNPAID, SAMPLE, DO NOT DISTRIBUTE

What the free tier includes

Free tier limits, stated plainly
LimitFree tierWhy it exists
Files per day6Keeps the free service fast for everyone
File sizeUp to 100 MBLarge enough for reports, catalogues and drawing sets
Pages per fileUp to 300Covers almost every business document
Logo imageUp to 5 MBCrisp logos without an enormous upload
RetentionDeleted within 60 minutesYour file is not kept longer than the job needs

These are the defaults the service runs on today; they are read from the same configuration the application uses.

What happens to your file

Your PDF is uploaded so it can be processed, written to a private directory, and read back only by the watermarking job. It is never used for anything else, never shared, and never kept for analysis.

A cleanup process sweeps the storage directory every few minutes and deletes everything older than the retention window, so an abandoned upload does not sit on a disk waiting to be noticed. Nothing is retained once you have the result.

  • No account, no email address, no profile
  • No document content in logs or analytics
  • Cookie-free, first-party page measurement only
  • Automatic deletion, not manual housekeeping

Frequently asked questions

Is this PDF watermark tool really free?

Yes. Every watermark style, every colour, opacity and page-range control is available without paying or creating an account. The free tier handles six files a day, up to 100 MB and 300 pages each, which is more than most free tools allow before they throttle you by the hour.

Is my PDF private when I upload it?

The file is uploaded to be processed, stored in a private directory and deleted automatically within an hour, whatever happens to it afterwards. It is never shared or used for anything except the watermarking job, and no document content appears in logs or analytics.

Does watermarking reduce the quality of the PDF?

No. The text and images already in the document are left untouched; the watermark is drawn on top of, or behind, them as new page content. Fonts used by the watermark are embedded and subsetted, so the file stays small and the original pages stay exactly as sharp as they were.

Can I use it on a phone or tablet?

Yes. The tool runs in any modern browser, so it works the same way on a phone, a tablet and a laptop: choose the file, adjust the settings and download the result. There is nothing to install on any platform.

What is the largest PDF I can watermark?

Files up to 100 MB and 300 pages are accepted on the free tier, which covers reports, catalogues, tender packs and drawing sets. If a document is larger than that, splitting it into parts and marking each part with the same settings gives the same result.

Keep reading

guide How to watermark a PDF To watermark a PDF, upload the file, choose a watermark style, type your wording, set the opacity to somewhere between 25% and 35%, apply it to every page and download the marked copy. The whole procedure takes about a minute in a browser, needs no software, and the original file is not changed - you keep the marked copy as a new file. hub Watermark large PDF files WalkingPDF accepts PDFs up to 100 MB and 300 pages per file on the free tier, with no sign-up and no per-hour throttle. Among the hosted watermark tools surveyed in October 2026, iLovePDF matches the 100 MB cap, Sejda is the only one to publish a page cap (200 on the free plan), and Smallpdf and PDF Candy do not publish either figure. The table below records the source of every number, and says where a vendor publishes none. hub Watermark types There are five watermark styles, and each one solves a different problem: a diagonal mark announces a status, a background mark brands without interrupting the text, a footer line identifies the source quietly, an image watermark puts a logo or stamp on the page, and a tiled pattern repeats across the sheet so it cannot easily be cropped away. Pick the job first, and the style follows. hub Watermarking by document type The right watermark depends on the document, not on the tool. An invoice needs a status word and a footer, a contract in review needs a diagonal DRAFT mark, a technical drawing needs a tiled owner name that survives a site photograph, and a certificate needs a signature image that cannot be mistaken for part of the design. Each page below covers one document type and the settings that work. hub The best PDF watermark tools For most people the best PDF watermark tool is a free, no-signup online tool that applies the mark on every page and gets out of the way - Adobe Acrobat is only worth paying for if you edit documents professionally, and the freemium suites are worth paying for mainly to escape their hourly throttles. The table below compares the documented limits and prices of the main tools, and the verdicts say who each one actually suits. policy Privacy We collect one thing that matters: the PDF you upload, and only so it can be watermarked. It is stored in a private directory under a random name, deleted automatically within 60 minutes whether or not you download the result, and never shared, sold, analysed or used to train anything. No account, no email address, no cookies, and no document content in our logs.