Free adoption path

Start using Universal Document

You do not need to understand schemas, software kits, hashes, or document internals. Choose what you want to do.

MAKING SOMETHING NEW?

Create

Write your document. Keep it living while it changes, or mark the finished version as sealed.

Create free

ALREADY HAVE A FILE?

Convert

Bring a PDF, Word file, spreadsheet, image, Markdown or text file. We handle the document format for you.

Convert free

SOMEONE SENT YOU A UD?

Just open it

A browser-ready .udr.html or .uds.html opens like a normal web page, even offline. Raw .udr and .uds files can use the free Reader.

Open a document

How do I start using UD?

Create something new with UD Creator, or convert a document you already have. Keep a document as UDR while it is changing and use UDS when it is final. Send people the browser-ready .udr.html or .uds.html version so they can open it without installing UD software.

Basic creation, individual-file conversion, reading, verification, and BrowserCarrier sharing are free. Bulk and enterprise conversion remain separate commercial services.

For software builders

Build UD into software

Use the open implementation profile, schema, test vectors, compatibility runner, algorithms, and reference implementation. No hosted UD API is required.

Open developer materials