Why watermark a whole ZIP at once?
Teams often receive or deliver files as archives: a month of invoices, a set of exam papers, a photo shoot, a data room export. Unzipping, watermarking each file and zipping everything back up by hand takes time and invites mistakes. BigWatermark turns that into a single step with one consistent watermark across every file.
How the ZIP workflow works
- Your browser opens the archive locally — the ZIP is not uploaded.
- Supported files are extracted from every folder level: PDF, JPG, JPEG, PNG, WebP, DOCX and DOC.
- System files (such as __MACOSX and hidden dot-files), unsupported formats and nested archives are skipped.
- Word files are converted to PDF so their layout stays intact, then watermarked like any other PDF.
- After processing, you download a new ZIP. Files with identical names are numbered automatically, e.g. report-watermarked.pdf and report-watermarked (2).pdf.
| Typical archive | Suggested watermark |
|---|---|
| Client photo shoot | Logo, bottom-right, 40% opacity |
| Invoices or statements | “COPY” or “PAID”, top-right, 0° |
| Exam or course materials | School name tiled at 15% opacity |
| Data room / due diligence | “CONFIDENTIAL – Prepared for [Company]”, 45°, center |
| Product catalog images | Store name, bottom-center, 35% opacity |
See also: how to watermark multiple PDFs at once and how to batch watermark photos.