Everything you need to know about watermarking multiple PDF files at once with PDF Lab
Go to Batch Watermark PDF ToolThe Batch Watermark PDF tool applies the same watermark to many PDFs in one operation. Upload your PDFs, configure watermark settings, and download the results as individual files or a ZIP archive.
Key features:
You can watermark up to 100 PDFs per batch with a total size limit of 1 GB. For best performance, smaller batches of 10-30 PDFs are recommended.
You can use text watermarks or upload an image watermark (PNG or JPG). Text watermarks are rendered to an image internally so placement and scaling remain consistent across PDFs.
Yes. The tool lets you choose a 3x3 position grid and adjust opacity, scale, and rotation. These settings apply to every file in the batch.
Yes. You can download each watermarked PDF individually or download a single ZIP containing all output files.
Files are stored only temporarily during processing and ZIP creation. After processing, temporary files are removed.
If the tool shows a Compress after watermark option, it uses Ghostscript to optimize file size after watermarking.
Some PDFs use compression that the default parser cannot read. If a file fails, try re-saving the PDF or optimizing it before uploading.
Password-protected PDFs need to be unlocked first. Use the Unlock PDF tool, then upload the unlocked files.
Yes, but large uploads are faster on desktop due to file size and network limits.