Interactive Markdown
Markdown, but alive.
Sliders, animations, live charts — the document computes as you
touch it. No server, no account: one plain .md file
that runs entirely on your device, offline and private.
Free forever for reading & writing · Open AINP format · Works offline, no account
Then email it to a friend — that's the whole idea.
Why Rho MD
Your data is yours
Every Rho document is a plain file on your disk. It works offline, needs no account, and can't be locked away. You own it for the long term.
An open format
Rho speaks AINP — an open spec under CC BY 4.0. Anyone can read it, write it, or build their own reader. You're never trapped in one vendor.
Works everywhere
Desktop or mobile, the same file opens the same way. Email it, commit it, archive it for ten years — it just opens, alive.
Three steps. No platform required.
Write plain Markdown
Add a Rho block — a slider, a chart, a stepper. Your document is still just text in a .md file you fully own.
It comes alive anywhere
Any Rho reader turns that block into a working widget — desktop, mobile, or the live demos on this page. The format is open, so the same file renders the same everywhere.
Send it like any file
Email it, drop it in chat, commit it to git. One portable file travels everywhere — and your reader gets the working app, not a screenshot.
Not a slideshow. Things you can actually poke.
Every panel below is a live Rho document — no video, no embed, no backend. Drag, switch tabs, step through. This is what your readers get.
See all examplesFree to use. Pay to create at scale.
Reading, writing, and sharing by link are free forever. You pay to keep every device in sync, to publish to the world, and to have Rho AI work for you — we run the model, so there is no API key to find.
- Read & write interactive
.md - Desktop and mobile reader, fully offline
- Share by private link with the readers you name
- 10 Rho AI requests, to see what it does
- The open
AINPformat, forever
- Your Psi library on every device you use
- Edited in two places? Nothing is lost — the older version waits in the recycle bin
- Publish to the public rho.md index — searchable, on your author page
- Organize works into collections
- Everything in Pro
- Rho AI, hosted — no API key, no setup
- 30M AI tokens a month
- 1,000 Rho web searches a month, with sources
- A daily ceiling of 3M, so one heavy day can’t drain the month
- Everything in Pro+AI
- 200M AI tokens a month — about 6.7× Pro+AI
- No daily ceiling, just the monthly one
- 5,000 Rho web searches a month
Prices include tax — the number you see is the number you pay. A year costs ten months. Plans are bought and switched inside Rho MD, under Settings › Account. Rho Editor — the visual editor for interactive documents — is a separate one-time purchase, priced when it ships.