Guides
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Scan documents with your phone, no app needed: here’s how on iPhone and Android
A sheet of paper as a PDF, without a scanner or app: how your phone scans in the browser, what matters when taking photos, and how to make the scan clean and searchable.
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Redacting PDFs: Why Black Bars Are Not Enough
A black rectangle over a name looks like security, but it is not. The text remains in the file underneath, and can be recovered with any tool.
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Making PDFs accessible: What has applied since June 2025
The Barrierefreiheitsstärkungsgesetz affects more businesses than most people realize, and it explicitly includes PDF files. Learn what makes a PDF accessible and where to start.
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Archive Invoices in Compliance with GoBD: PDF/A and What Else Is Required
PDF/A is the usual first step in archiving, but it is not enough on its own. What the GoBD actually require and which part of it a file format can address.