A calm place to read and mark up PDFs
Inkfolio is a PDF viewer and editor built for studying, reviewing and signing. It is fast, it feels good with a stylus, and it keeps your files on your device.
Who is behind it
Inkfolio is a free personal project made and run by an independent developer. It is not a company product, it has no advertising, and nothing on it is for sale.
What we believe
Private by design
Documents are processed in your browser. We do not upload them, read them or keep copies.
Ink that feels right
Pressure, tilt and smoothing are tuned so handwriting looks like handwriting and quick scribbles stay clean.
Useful for learning
Highlight, annotate, search and reorganise pages: the things students, teachers and researchers do every day.
Built on open source
Inkfolio stands on excellent open-source work. We are grateful to the maintainers of these projects:
- PDF.js by Mozilla, for reading and rendering PDFs (Apache License 2.0).
- pdf-lib by Andrew Dillon, for creating the saved PDF (MIT License).
- Figtree by Erik Kennedy, for the typeface (SIL Open Font License).
Get in touch
Questions, feedback or feature ideas are welcome at [email protected]. You can also read the FAQ.