Ethereum in MetaMask, Solana in Phantom, an older address you keep for receiving payments. The more wallets you use, the harder it becomes to answer a simple question: how much do I actually hold?
This is a guide to Crypto Wallet Viewer (wallet.microfund.co.jp), a read-only tool that brings the balances, yen and USDC valuations and transfer history of several wallets onto one screen, using nothing but their public addresses.
It is written for individuals who hold crypto in self-custody wallets rather than on an exchange. It is an explanation based on the information and the service specification as of September 2026.
Why a read-only viewer
A wallet app shows the balance of the addresses it manages, and not much else. Once your holdings are split across apps and chains, the friction tends to collect in three places.
- There is no total. You end up opening each app in turn and adding the numbers up on a calculator, with Ethereum and Solana balances shown in different units.
- Past movements are hard to follow. Block explorers such as Etherscan and Solscan list transactions one at a time. If you want to know how much arrived in a given month, you end up counting by hand.
- Connecting a wallet to an unfamiliar site feels wrong. Being asked to connect or sign something just to look at a balance is exactly the habit that phishing sites rely on.
Balances and transaction history on a public blockchain can be read by anyone who knows the address. That means looking requires neither a wallet connection nor a signature.
Crypto Wallet Viewer is built on that property: you paste an address and it reads the chain. Because it never holds any authority over the funds, opening it cannot move anything, and there is nothing to approve by accident.
Getting started in three steps
All you need is an email address and the public addresses of the wallets you want to see. What can be done from a wallet is described in this earlier article.
- Step 1: create an account. On the sign-up page, enter a name, your email address and a password of at least eight characters, then press the create button.
- Step 2: open the confirmation email. Open its link within 15 minutes and the account is activated, with 60 minutes of usage time added. Until then you cannot log in.
- Step 3: register your wallets. Open “wallet registration” in the menu, paste an address, give it an optional name such as “main” or “receiving”, and register. There is no field for a private key or seed phrase.
If the 15 minutes pass, enter your email and password on the login page and a fresh confirmation email is sent. Check your spam folder if nothing arrives.
The chain is detected from the format: 0x followed by 40 hex characters is Ethereum, a Base58 string of 32 to 44 characters is Solana. You can register up to 20 wallets per account.
The 0x address from MetaMask, Trust Wallet or Uniswap Wallet is read as an Ethereum address; a Solana address from Phantom is read as Solana.
One point that confuses people: the “connect wallet” button at the top right is only for paying the usage fee in USDC. It is unrelated to the wallets you view, and you never need to press it just to look.
How to read the three screens
Top page (holdings overview). The total value of every registered wallet, shown in USDC and in yen.
Below it are horizontal bar charts by wallet and by asset (assets with the same name are combined across chains, so USDC on Ethereum and USDC on Solana appear as one bar).
There is also a line chart of how the value has changed, and a table with one row per wallet and its main assets. A switch lets you show both currencies, USDC only or yen only. For a daily check, the single line with the total is usually enough.
Holdings detail. One wallet at a time: a pie chart of the allocation, a chart of the value over time, and a table of each asset with its quantity and value in USDC and yen.
Tokens with no available price, which includes spam airdrops, are left out of the value and hidden by default; a “show” button reveals them. Pills at the top switch between wallets.
Transfers. Each line is one currency moving in one direction, so a swap appears as two lines, one out and one in. You can filter by direction, year and month.
Summary tiles show the number of deposits and withdrawals, their value at the price on the day of the transaction, the difference between the two, and the network fees.
The “received totals” tab adds up everything that arrived, month by month and day by day, and can be downloaded as CSV, which is handy if the address is one you give to people who pay you.
An AI analysis page, using an API key you register yourself, is also available as an extra.
One caveat deserves emphasis. The value-over-time chart multiplies the quantity held at each point by today’s price. It shows how your holdings changed, not what they were worth on those days.
If a token has doubled since, the past will look larger than it really was.
What tends to work, and common pitfalls
✅ What tends to work
Registering wallets split between Ethereum and Solana puts the total on one line, so there is no longer any need to open each app and add things up.
The by-asset chart also shows whether USDC is scattered across both chains in amounts that are easy to lose track of, which is useful to know before consolidating.
⚠️ Common pitfalls
A common mistake is registering an exchange deposit address as if it were your own wallet. The balance comes out close to zero and the transfers are a stream of amounts arriving and leaving almost at once.
A deposit address is controlled by the exchange, which moves incoming funds elsewhere. Registering the address shown on the “receive” screen of your wallet app fixes it.
Another source of confusion: a token that seems to be missing from the detail screen may simply have no available price, which means it is hidden by default. If a number looks wrong, check the address first, then the hidden tokens with the “show” button.
Common questions
Q. Do I need to enter a private key or seed phrase?
A. No. Only public addresses are registered, the service never asks for a key or phrase, and it has no ability to move funds.
Q. Can I view an address that is not mine?
A. Yes. Because the data is public, ownership is not checked with a signature.
That is useful for a receiving address used by your business, but it also means the numbers are only as meaningful as the address you paste.
Q. What does it cost?
A. The first 60 minutes, added when email confirmation completes, are free. After that you buy usage time: 1 hour 2, 1 day 10, 1 week 28 or 1 month 70 USDC, paid in USDC on Ethereum or Solana.
Usage time runs from the time of purchase (it also runs while you are not logged in). There is no subscription or automatic renewal. Prices may change without notice.
Q. Which chains are supported?
A. Ethereum (ETH and ERC-20 tokens) and Solana (SOL and SPL tokens) only. The same 0x address may hold funds on Base or other networks, but those balances are not shown.
In closing
Create an account, confirm your email within 15 minutes, paste your addresses. That is the whole setup, and afterwards the total and the history of wallets that used to live in separate apps sit on one screen.
Nothing can be sent from it, so checking stays checking. Use the first hour to see the real total of your own wallets.
💡 See your Ethereum and Solana wallets on one screen, in yen and USDC
Register public addresses and read the value, transfers and received totals of several wallets together. No private key, no signing. Sixty minutes of usage time are added once your email is confirmed.
(Based on the screens as of 14 September 2026. Crypto Wallet Viewer is a read-only tool and cannot send or swap assets. Values use current prices, and the value-over-time chart multiplies past quantities by current prices. Crypto prices are highly volatile; this article is not investment advice and does not recommend buying any asset)
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