The reading-altitude engine

Read anything, at exactly your level.

Rosetta rewrites a dense expert document — a medical study, a contract, a research paper — to your level of background knowledge, then lifts you higher as you go. Every figure, every hedge, every caveat preserved. Never dumbed down into being wrong.

Translate a document — free See the altitudes

Keeps every number & hedge · never overstates · not advice

nature-immunology.pdf Altitude 2

Explorer

Original

1 · Explorer

Your body’s defense cells learn what a germ looks like, so next time they fight it off faster.

2 · Reader · you’re here

Memory T-cells recognise the virus’s proteins and trigger a faster, stronger response the second time you’re exposed.

5 · Original

“Antigen-experienced CD8⁺ T-cells mount an accelerated effector response upon secondary epitope challenge.”

Same claim at every altitude · nothing added, nothing overstated

5reading altitudes, from curious beginner to the original

1:1translation aligned to its source, sentence by sentence

0numbers, hedges, or caveats dropped in translation

3quick questions to check what you actually understood

Papers, contracts, filings & abstracts Every quantitative claim preserved Nothing stored · never trains models Export to Markdown anytime

Altitudes

Slide to your level.

One slider morphs the whole document across five altitudes — from a curious twelve-year-old to a working practitioner to the untouched original — with a lens-focus crossfade. Start where you’re comfortable and climb as it clicks.

Explorer · Reader · Student · Practitioner · Original
The whole document re-levels in one motion
Climb a level anytime — the meaning holds

Per-section pinning

Keep the hard parts hard.

You don’t need every section at the same depth. Pin the methods to Practitioner while the results sit at Reader — Rosetta holds each section exactly where you set it, so nothing important gets flattened by accident.

Pin any section to its own altitude
Simplify the parts you skim, keep the parts you trust
The rest of the document still moves with the slider

Side by side

Never lose the original.

Translation and source sit in aligned columns. Hover any rewritten sentence and the exact source lines light up — and the other way around. Technical terms that survive keep a dotted underline you can tap for a definition.

Every sentence traceable to the words it came from
Glossary tooltips on the jargon that stays
Check the original in one glance, never a tab away

One document, many readers

Meet the page where you are.

The same dense document holds a dozen readings at once — one for the beginner, one for the specialist, one for everyone between. Rosetta finds the layer that fits you and lets you climb toward the source at your own pace.

5altitudes per document

1:1aligned to the source

100%of figures & hedges kept

The engine

Focus, not dumb-down.

Like a lens bringing a page into focus, Rosetta resolves a dense passage to your level without bending what it says. It carries every quantitative claim, every “may,” every “in mice,” every sample size — and refuses to make a simpler sentence a more confident one.

Preserves numbers, units, and confidence intervals
Keeps every hedge and safety-relevant caveat
Simplifies the language, never the certainty

A glass prism bringing a beam of light into a focused amber-to-violet spectrum

Pricing

Start free. Go deeper when it earns its keep.

Every plan keeps the full integrity guarantee. Higher tiers lift the limits and open up pinning, glossary, exports, and the API.

Free

Read a few documents a month at any altitude.

$0/mo

5 documents / month
All five altitudes
Side-by-side source view

Get started

Simpler should never mean wrong.

Making an expert document readable is easy to do badly — round off a number, drop a hedge, and you’ve changed what it means. Rosetta is built to refuse that.

Integrity first

Every quantitative claim, every hedge — “may,” “in mice,” the sample size — and every safety-relevant caveat survives the translation. A simpler sentence is never a more confident one.

Check my understanding

After a read, three questions on what you actually saw. Miss one and Rosetta suggests pinning that section a level simpler; ace them and it nudges the whole document a level higher.

Your document stays yours

The working document lives in your session only — nothing is stored, and it’s never used to train models. Export the current reading to Markdown whenever you like.

Read your first document free

The hard document, finally at your level.

Paste a passage or upload a file and slide it to wherever you are. Climb toward the original as fast as it clicks — with every number and caveat still intact.

Translate a document — free See pricing