About Mofumi PDF
Mofumi PDF is a free toolkit of 132+ PDF tools that run entirely inside your web browser.
Our mission
PDF tools shouldn't cost money or privacy. Most online PDF sites upload your contracts, payslips and ID cards to their servers. We built Mofumi PDF so you never have to.
How privacy works
When you open a file, your browser reads it into memory on your own device. All processing happens there, using engines that were downloaded once as part of the website. There is no upload step and no processing server — you can even disconnect from the internet and keep working.
Your device
Our server
Only the website code is downloaded
Technology
Mofumi PDF is a static website. Heavy lifting is done by battle-tested open-source engines compiled for the web:
pdf-lib (@cantoo fork) · MIT
Create, edit and encrypt PDFs
pdf.js · Apache-2.0
Render pages, read text
qpdf (WASM) · Apache-2.0
Linearize, repair
Tesseract.js · Apache-2.0
OCR (English + Thai)
JSZip · MIT
ZIP archives
React Flow · MIT
Workflow canvas
node-forge · BSD-3-Clause
Digital signatures
Sarabun · OFL-1.1
Thai + Latin font in generated PDFs
Open-source credits
We are grateful to the authors of pdf-lib, pdf.js, qpdf, Tesseract, JSZip, React Flow and the Sarabun font.