PDF Candy's editor handles the ordinary PDF tasks that arrive without warning: adding text, inserting images, highlighting, annotating and signing. It runs in the browser and is free for the core operations, which matches how these needs actually occur, occasionally and urgently.
The economics are the whole argument. Dedicated PDF software is a meaningful annual subscription, and most people need to edit a PDF a handful of times a year, usually to sign something or correct a typo. Paying an annual fee for that is poor value, and a free browser tool covers it.
Signing is the most frequently needed operation and the one most likely to be wanted on a document you would rather not upload anywhere. The sensible caution applies: for confidential contracts or documents containing personal data, consider whether a browser service is appropriate, and check the retention policy before uploading.
