- Can the watermark be removed?
- The text is drawn straight into the page content, so there's no remove button hidden in the file. That said, this isn't a security measure — anyone with a PDF editor can still strip it out. Think of it as a marking, not a lock.
- Does Vietnamese diacritical text render correctly?
- Yes. The tool embeds a Unicode font in the file, so accented characters display correctly in every PDF viewer. The embedded font only adds around 6KB to the file.
- Can I watermark just a few pages instead of the whole document?
- Yes. Leave the page range field blank to watermark every page, or enter something like 1-3, 7 to stamp only those pages.
- Can I use an image watermark, like a logo, instead of text?
- Not yet. This tool only handles text watermarks for now. An image variant needs picking two different file types in one go, and that's still being built.
- Does this upload my file to a server?
- No. The whole watermarking process runs as JavaScript right inside your browser. Your file never leaves your device.