MarblePrivacyOpen App
A classical marble bust wearing a magenta visor with a glowing yellow strip

Your privacy.Set in marble.

A considered workspace for your wallet, your data, and what you choose to reveal.

A workspace, not a cloak

It reads what the chain already shows, keeps your notes encrypted on this device, and conceals what your screen displays. Public blockchain data remains public.

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Inside, it is quiet. Outside, the chain is still public.

The Sanctuary

MarblePrivacy is a workspace, not a cloak. It helps you read what is already public, keep what is yours on your own device, and decide what your screen shows.

Read what the chain already shows.

Wallet Inspector · Live data

Any address, any transaction, any call you are about to sign and any approval you granted, through a read-only relay. Clearly, and before you act.

Keep your notes sealed on this device.

Notes Vault · Local only

Sealed in this browser with AES-256-GCM under a key derived from your passphrase. Titles, text and links are all ciphertext. They are never uploaded.

Decide what your screen shows.

Screen Privacy · Local only

Balances, addresses and amounts stay concealed in this interface until you reveal one. It is for shared screens and recordings, and it changes nothing on the chain.

Receive at one-time addresses.

Stealth Addresses · Chain 4663

ERC-5564 hides who received a payment. The sender, the amount and the time stay public, and a careless withdrawal links it back.

Public blockchain data remains public.

Cut in stone

Connecting a wallet does not make you private. Neither does a hidden balance, a local note or an ordinary transaction.

Working tools

Try them here. They are the real ones.

No sample dashboards and no invented numbers. Each panel runs the same code as the app, against the same providers, with the same honest empty states.

Live data· through the relay

Wallet Inspector

A read-only look at any public address: balance, sent-transaction count, whether it is a contract, and its recent activity when an explorer index answers.

Loading the tool…
Open the inspector
Local only

Notes Vault

Private notes, encrypted in this browser. This panel shows the vault that exists here, right now.

Loading the tool…
Open the vault
Local only

Screen Privacy

One switch conceals balances, addresses and amounts across the interface, with a reveal control on each value.

Loading the tool…
Open the Privacy Panel
Live data· chain 4663

Stealth Addresses

ERC-5564 on Robinhood Chain. Ask the on-chain registry whether an address can be paid at a one-time address — then send, receive or register in the app.

Loading the tool…
Open stealth addresses
How it works

Understand the boundary.

Every piece of information here lives in one of four places. Knowing which is the whole point: it tells you who can see it, and what this product can and cannot do about that.

Public on-chain

Anyone can read it, now and later.

  • Addresses and their balances
  • Every transfer, with amount and time
  • Token approvals and contract calls
  • The fact that you transacted at all

Nothing in MarblePrivacy changes this.

Stored in this browser

It stays on your device.

  • Your notes — as ciphertext only
  • Preferences and the Screen Privacy switch
  • A local activity log
  • A cache of public stealth announcements

Clearing browser data removes it. A forgotten passphrase cannot be recovered.

Sent to providers

What you look up leaves the browser.

  • The address, hash or calldata you inspect
  • Through this site’s relay to an RPC provider
  • To an explorer index for history and tokens
  • Contract addresses to Sourcify for verified ABIs

They see the query and this server — never your notes or passphrase. Your wallet uses a provider of its own.

Hidden only on screen

Concealed here, unchanged everywhere else.

  • Balances, addresses, hashes and amounts
  • Until you press reveal on one
  • For calls, recordings and screenshots
  • Typed addresses shown as dots

The chain and the providers see exactly what they saw before.

The one on-chain mechanism

Stealth addresses, stated plainly.

MarblePrivacy integrates ERC-5564 on Robinhood Chain (chain 4663) through the standard Announcer and Registry contracts, whose source is verified on Sourcify. It is a real protocol with a narrow guarantee.

What it hides

  • Who received a payment: each one goes to a fresh address that is not linked to the recipient’s wallet.
  • That two payments went to the same person.

What it does not

  • The sender, the amount and the time — all public.
  • A withdrawal to an address already known to be yours links the payment to you.
  • ETH only. The contracts’ audit status is not asserted, and this application is not audited.
Open stealth addresses
Not in this build

No cloak, and no claim of one.

Not part of this build, and not implied anywhere in it: mixing, shielded pools, zero-knowledge transfers, private swaps or trading, anonymity or untraceability guarantees. No verified protocol for those exists on the supported chain, so those controls do not exist here. Read the full explanation.

The token

$MARBLE

$MARBLE is live on Robinhood Chain. The only official address is the one on this page.

Ticker
$MARBLE
Contract address
0x1e9B57B1986142ddAf11E0a116D4B4A83D34eB2F
Network
Robinhood Chain · chain 4663

Reading the contract…

Every tool in this workspace works without it, and holding it changes nothing about what a public chain shows.

Asked before connecting

Does connecting a wallet make me private?

No. Public blockchain data remains public. Connecting only lets a tool ask for your signature when you choose to use one; the inspector, the vault and screen privacy work without it.

What does Screen Privacy hide?

Balances, addresses, hashes and amounts in this interface, until you reveal one. It is concealment for a shared screen or a recording, not encryption, and the chain is unchanged.

Where are my notes kept?

In this browser, as ciphertext: AES-256-GCM under a key derived from your passphrase. They are never uploaded, and a forgotten passphrase cannot be recovered.

What do stealth addresses hide?

Who received a payment, on Robinhood Chain. The sender, the amount and the time stay public, and a withdrawal to an address known to be yours links it back. ETH only.

Has it been audited?

No. This application is unaudited, and a passing test suite is not a security audit. The stealth contracts’ own audit status is not asserted either.

The threshold

Choose what you reveal.

No account and no sign-up. The inspector, the vault and screen privacy work without a wallet; connect one only when a tool needs your signature.

Open MarblePrivacy
MarblePrivacy — Your privacy. Set in marble.