WaterMark PDF for WooCommerce - Stamp PDFs with Customer Data

1. Is WooCommerce installed, and do you have a PDF product in your shop to watermark?
2. Update WordPress, WooCommerce, and this plugin to the most recent versions. We recommend you set PHP max 8.2 because that is what TCPDF can handle. Try 8.3 and see if that works for you, though. Downgrade your PHP if needed.
3. Have you checked the box at the top of your settings page (Woocommerce -> Settings -> Watermark) so that watermarking is enabled?
4. Have you entered your PDF file names correctly in the second field if you've entered any at all?
5. Is your PDF version 2.0? You'll want to look into using PDF Stamper for WooCommerce instead.
6. Is your Y fine-tuning adjustment off the page? Read more below under "Why does the watermark go off the page, create blank pages?".
7. Go to WooCommerce -> Settings -> Watermark -> Error/event logging, turn logging on, and run the program again. Look at the logs.
8. Check your WP debug logs (link to instructions below). If logs suggest your PDF is "goofy" or "template does not exist," try using Apple Preview application to resave your PDF by clicking "Export as PDF" in the menu. Preview might fix bad PDF syntax and allow your PDF to be processed for watermarking.
9. It may also help to increase your PHP time limit and memory limits if they are set low. Server limitations can stop this plugin from functioning well.

1. Make sure your WooCommerce downloads work WITHOUT WaterWoo activated, to narrow the problem.
2. Try watermarking a different PDF (one you didn't create). If your PDF has goofy syntax (and many do - correct PDF syntax is "optional" for some PDF builders), WaterWoo will not be able to read it. Look into using WooStamper instead
3. Read through the support forum. Tip: it has a search feature! Your answer is probably there by now since this plugin has been around a long time. Please do get in touch with your issues via the Wordpress.org support forum before leaving negative feedback about this free plugin.

You can find the WaterMark PDF settings page by clicking on the "settings" link under the Watermark PDF for WooCommerce plugin title on your Wordpress plugins panel, or by navigating to the WooCommerce->Settings->Watermark tab.

Select the “Deja Vu,” “Furat,” or “M Sung” font in the plugin settings panel if your language uses accent characters and find out if one supports characters in your language. A primary reason watermarks do not show up is when the watermark contains special characters but a font which doesn’t support those characters is in use. If none of the included fonts are subsetted for your language characters, you will need to programmatically add fonts yourself or look into purchasing the Premium version of this plugin, which supports font uploads.

Maybe set your PDF to $0 (free) and "Privately Published". Or maybe create a coupon in your Woocommerce shop to allow 100% free purchases. Don't share this coupon code with anyone! Test your watermark by purchasing PDFs from your shop using the coupon. It's a bit more tedious. If you want an easier go of it (on-the-fly testing), purchase the Premium version of this plugin.

Your watermark text string is too big or long for the page, and goes off it! Try decreasing font size or using the Y fine tuners to move the watermark back onto the page. Try lowering your "y-axis" value. This number corresponds to how many millimeters you want the watermark moved down the page. For example, if your PDF page is 11 inches tall, your Y-axis setting should be a deal less than 279.4mm in order for a watermark to show. The built-in adjustments on the settings page ultimately allow for watermarking on all document sizes. You may need to edit your watermark if it is too verbose. You can use a negative integer value for your Y-tuner and measure up from the bottom of the page. This is especially helpful if your PDF has variable sized pages.

They are generated with a unique name and stored in the same folder as your original Wordpress/Woo product media upload (usually wp-content/uploads/year/month/file). The unique name includes the order number and a time stamp. If your end user complains of not being able to access their custom PDF for some reason (most often after their max number of downloads is exceeded), you can find it in that folder, right alongside your original. If you are using Woo FORCED downloads, the plugin attempts to delete the watermarked files after being delivered. This isn't 100% reliable since it works on PHP shutdown. If you don't like attempted deletion, you can change it with the 'wwpdf_do_cleanup' filter hook (set it to FALSE).

Watermark PDF for WooCommerce is intended to watermark PDF (.pdf) files. If you are specifically looking to watermark image files (.jpg, .jpeg, .gif, .png, .etc), you may want to look into a plugin such as Image Watermark.

No, sorry. This plugin is just for PDF files.

This plugin bridges WooCommerce and the open-source PDF reading TCPDI and PDF writing TCPDF library. WaterMark PDF functions by parsing/reading your PDF into memory the best it can, then adding a watermark to the PDF syntax and outputting a revised file. Between the reading and output, certain features may be lost and other features (interactive PDF elements like internal links and fillable forms) will be lost. This is a limitation of the open-source third-party library used AND the wild-west nature of PDF syntax. It is not the fault of WaterWoo, which simply connects those libraries to WooCommerce. If you are serious about watermarking and/or encrypting complex PDF files, consider purchasing the best plugin available for your PDFs, PDF Stamper for WooCommerce. Ultimately, Watermark PDF for WooCommerce is best for simple, smaller-sized and well-formed PDFs.

Yes, you can serve the file untouched if watermarking fails, and avoid any error messages, by using the following filter code in your (child) theme functions.php file: add_filter( 'wwpdf_serve_unwatermarked_file', '__return_true' ); If you do not know how to edit your functions.php file, you can use the Code Snippets plugin to easily add this code to your WP site frontend.