A watermark is not protection. It stands in the file as text and can be taken out again. It goes over the content: pdf-lib appends to the content stream, and putting something behind it would need a rebuild of the page — offered half-working it would be worse than not offered.

This document has form fields. They hang on the catalogue of the source and are lost when pages are copied — in some readers they show up empty, in others not at all. Flattening draws their contents into the page: it then looks the same everywhere and is no longer fillable, which for a filled-in form is almost always what is meant.

Placeholders: {name}, {datum}, {seiten}. The template for new documents is in the settings.

Changes take effect at once and are remembered. If you edit one of the included schemes, a copy of your own is created automatically, marked “(custom)”.

The language files are fetched from the net on the first recognition (about 10 MB each) and land in the browser cache. Whether they stay there depends on the browser — if they do not, the first recognition after a reload takes that long again.

A redacted page becomes an image — that is the only way the text underneath is really gone. Every piece of text outside the bars then comes back as an invisible layer, so the page stays searchable. The browser fetches the language files for text recognition from the net on the first run (about 10 MB each).

Placeholders: {name} is the name on the card, {datum} today’s date, {seiten} the number of pages. Empty means just the name.

These apply when a document contains a redaction. Because the file is built anew, the metadata, bookmarks and attachments of the source do not come along in any case — what these switches reach is the file being written and the annotations that are copied with a page. Your own highlights, boxes and comments always stay; they are the point.

With a folder chosen, splitting a document writes the new file straight into it. Switch this off to keep the folder as a source only. Nothing else is ever written by itself: renaming a document takes effect the next time it is written.

The settings live in this browser’s storage. They do not come along when you move to another device or browser — that is what the backup file is for. The PDFs you have open are not part of it; they never leave your machine.

Resetting puts colours, sizes, the export switches and the stamps back to how they were on the first visit. The open documents are not touched.