Everything you need to know about watermarking multiple PDF files at once with PDF Lab
Go to Batch Watermark PDF ToolBatch Watermark PDF adds the same text or image watermark to many PDFs in one go. Choose your settings once, add your files, and download the results one by one or as a single ZIP.
Up to 100 PDFs per batch, with a total size of up to 1 GB. Batches of 10–30 files finish fastest.
A text watermark, such as "CONFIDENTIAL" or your company name, or an image watermark such as a logo (PNG or JPG). A PNG with a transparent background looks cleanest.
The same settings are used for every PDF in the batch.
Yes. Tick Compress after watermark to reduce the size of each watermarked PDF. This can slightly lower image quality.
Yes. Files are processed one at a time, so you can stop at any point. Files that have finished stay available to download.
Each file keeps its original name with "_watermarked" added, so report.pdf becomes report_watermarked.pdf.
Password-protected PDFs must be unlocked first with Unlock PDF. Damaged files, or files saved in an unusual way, can also fail. Opening and re-saving them as PDF usually helps. The rest of the batch carries on.
Yes, but uploading many large files is faster and more reliable on a computer with a good connection.
Batch watermarking runs on our own servers. Your PDFs are uploaded over an encrypted connection, kept only while the batch and ZIP are created and you download them, and then deleted. They are never sent to a third party. To keep files on your device instead, use Watermark PDF with local processing.