Fileso can add a text or image watermark to a PDF on iPhone and iPad. Use it to label a draft, identify a sample, or place a logo on a document before sharing. Image watermarks are available in the published 2.0.1 release.
Prepare the watermark
For text, choose a short label that remains readable without obscuring the page. For a logo, a PNG with transparency works well because it avoids a solid rectangular background around the design.
Keep a copy of the unmarked PDF. Fileso redraws pages for this tool, and the output flattens form fields and links. Complete required interactive form work first, and keep an interactive original if it matters.
Add the watermark in Fileso
- Open Tools → Add Watermark and select the PDF.
- Choose Text or Image as the watermark type.
- Enter the wording, or select the logo image from Photos or Files.
- Adjust the available layout, size, opacity, position, and rotation settings for the chosen type.
- Inspect the preview, then run the tool.
- Open the saved result and review several pages with different layouts.
A logo that fits an empty cover can cover a table heading on an inner page. Check portrait and landscape pages separately when the PDF contains both.
Choose visibility without hiding content
Lower opacity can make a large mark less intrusive, but test small text and shaded diagrams beneath it. A repeated watermark may make casual reuse less convenient, yet it should not prevent the intended reader from understanding the document.
Transparent pixels in a logo and the watermark’s overall opacity are separate factors. If a logo looks like a white box, inspect the image file itself before changing the PDF settings.
A watermark is a label, not access control
Watermarking does not password-protect the document, establish copyright ownership, or guarantee that someone cannot copy its contents. It also does not remove private text beneath the mark.
Before sending the PDF, check the output size and confirm that flattened links or forms are acceptable. Use a descriptive final filename so the marked copy is easy to distinguish from the reusable original.
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