Is KissThePDF really 100% free with no limits?

Yes. KissThePDF is an open-source (MIT licensed) project. There are no paid tiers, daily usage quotas, file size limits, or watermark insertions.

Can I add new text and customize the font?

Yes. You can place text boxes anywhere on the document, choose font families, adjust font size, change text colors, and align text.

Can I add my signature to PDF documents?

Yes. You can draw a signature freehand, upload a signature image, or type your name using our built-in signature tools.

Are my uploaded PDFs sent to any third-party server?

No. KissThePDF runs entirely in your browser using client-side JavaScript and WebAssembly. Your documents are never uploaded, logged, or shared.

Which operating systems and browsers are supported?

KissThePDF works smoothly on Google Chrome, Apple Safari, Mozilla Firefox, Microsoft Edge, and modern mobile browsers across Windows, macOS, Linux, iOS, and Android.

Docs

100% Client-Side Engine

GitHub

Free Online PDF Editor

Step-by-step guide: How to Edit a PDF for Free (Text, Images, Shapes and Notes)