Software guide

Fill in, sign and combine PDF documents

Complete PDF forms on screen, add a signature, merge several files into one and reduce the file size, without printing or scanning anything.

Estimated time: 20–30 minutesUpdated: 28 September 2026

Use this guide when you receive a PDF form to fill in, a contract to sign, or need to send several documents as a single file. You need a PDF reader or editor on your computer or phone and, for signing, a clear image of your signature or a touchscreen.

Step by step

  1. Open the PDF in a proper PDF tool

    Opening a PDF in a web browser works for reading, but filling and signing are easier in a dedicated PDF reader or the built-in tools on your computer or phone. Save a copy before you start so the original stays untouched. Check whether the form has fillable boxes by clicking on a field.

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