About katanapdf

katanapdf is a free, browser-based PDF editor built on a simple principle: editing a PDF should not require uploading your file to a server, creating an account, or paying a subscription.

How it works

Everything runs in your browser. We use PDF.js for rendering, pdf-lib for saving, and Tesseract.js for optical character recognition — to open, edit and download PDFs without ever sending your file anywhere.

What you can do

Edit existing text, add new text boxes, insert images, draw and annotate freehand, add shapes, sign documents, merge multiple files, split pages, reorder and delete pages, and convert images to PDF — all free, with no watermark.

Why free?

The site is supported by unobtrusive advertising. There is no paid tier and no plan to add one.

Contact

For feedback, bug reports, or feature requests, reach us at katanapdf@gmail.com.