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Portfolio Tracking Without Wallet Connection
The biggest risk with most portfolio trackers is that they ask you to connect a wallet or enter an API key. You end up giving read-only access to your entire transaction history to a third-party server. That defeats the purpose of self-custody.
Our Crypto Portfolio Tracker works entirely in your browser. You enter your holdings manually — BTC, ETH, SOL, or any of the top 200 coins — and it pulls live prices from public APIs. Nothing is saved, uploaded, or transmitted. Close the tab, and the data is gone.
You can organize your portfolio by exchange, wallet, or strategy. If you hold 0.5 BTC on Coinbase and 2.3 ETH in MetaMask, you enter both entries, and the tool aggregates your total value in USD. It updates in real time as prices move, so you always know your net worth without exposing your addresses.
Calculating Crypto Taxes and P&L
Crypto tax season is a nightmare if you've been active. Every swap, every sale, every DeFi interaction creates a taxable event. The IRS and most tax authorities treat crypto as property, meaning you owe capital gains tax on every disposal.
The Crypto Tax Lot Calculator helps you figure out exactly which lots you're selling and what your cost basis is. You enter your acquisition date, purchase price, and quantity for each batch, then specify what you're selling. The calculator shows your realized gain or loss down to the dollar.
For a broader view, the Crypto Profit Calculator takes your total invested capital and current holdings value and tells you your overall return. If you put $10,000 into crypto across 2024-2026 and your portfolio is now worth $24,500, that's a 145% return — but only after you account for every trade's cost basis.
Mining Profitability Estimation
Mining profitability changes daily based on Bitcoin's hash rate, block reward, electricity costs, and hardware efficiency. What was profitable last month might be underwater today.
The Mining Profitability Calculator takes your hardware specs (hash rate in TH/s, power draw in watts), your electricity cost per kWh, and pool fees, then estimates your daily, monthly, and annual returns. For example, an Antminer S19 Pro running at 110 TH/s with 3,250W draw at $0.12/kWh would net roughly $4.50 per day at current BTC prices — before pool fees.
| Hardware | Hash Rate | Power | Daily Revenue | Daily Cost ($0.12/kWh) | Net/Day |
|---|---|---|---|---|---|
| Antminer S19 Pro | 110 TH/s | 3,250W | $13.80 | $9.36 | $4.44 |
| Antminer S21 | 200 TH/s | 3,500W | $25.10 | $10.08 | $15.02 |
| Whatsminer M66 | 290 TH/s | 5,400W | $36.40 | $15.55 | $20.85 |
The calculator factors in BTC price, network difficulty, and block reward halving schedules. It updates based on current network data so you can make informed decisions about hardware purchases and whether to keep your rig running during market downturns.
Seed Phrase Generation Safety
Generating a seed phrase is one of the most security-critical things you'll do in crypto. You want true randomness — not something generated by a website that may have sent the phrase to a server or stored it in your browser.
Our Seed Phrase Generator runs entirely client-side using cryptographically secure random number generation. It produces BIP39-compliant 12-word or 24-word seed phrases from the official BIP39 word list. The words are generated in your browser and never leave your machine.
After generating your phrase, you can validate any existing Ethereum or Bitcoin address using the Wallet Address Validator to check for typos before sending funds. A single mistyped character in an address can result in a permanent loss of funds.
Gas Fee Optimization
Ethereum gas fees fluctuate wildly based on network congestion. A simple USDT transfer might cost $0.50 during low activity or $15 during a popular NFT mint. Sending without checking current gas prices is like mailing a package without checking postage rates.
The Gas Fee Calculator shows current gas prices for Ethereum (in Gwei) and estimates the total cost of transfers, swaps, and contract interactions. You can input the gas limit for your transaction type — a standard ETH transfer uses 21,000 gas, while a Uniswap swap might use 150,000-250,000 gas — and see the dollar cost instantly.
Pro tip: Ethereum gas tends to be lowest on weekends between 12:00 AM and 6:00 AM UTC. Setting your transaction to a 1559 priority fee of 2-3 Gwei above the base fee usually gets it confirmed within 5 minutes during normal congestion. During NFT drops or market volatility, wait it out unless the transaction is time-sensitive.
More Free Crypto Tools
Beyond the tools above, iluv.tools offers a complete suite of crypto calculators and utilities, all free and running entirely in your browser:
- Crypto Unit Converter — Convert between SATS, Gwei, ETH, BTC, and fiat currencies instantly.
- DCA Calculator — See how dollar-cost averaging into BTC or ETH would have performed over any date range.
- Market Cap Calculator — Calculate a coin's market cap from price and circulating supply, or figure out what price would be at a given market cap.
- Staking Rewards Calculator — Estimate your staking yield for ETH, SOL, ADA, and other proof-of-stake coins.
- NFT Rarity Ranker — Compare trait rarity across NFT collections.
- Token Metadata Generator — Build ERC-20 and BEP-20 token metadata for development and testing.
- Transaction Decoder — Decode raw transaction hex into human-readable fields.
- Contract ABI Decoder — Decode smart contract function calls and events from ABI-encoded data.
Explore All 15 Free Crypto Tools
Track your portfolio, calculate taxes, estimate mining returns, and more — all in your browser with no account required.
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