Crypto Tools

15 free blockchain and cryptocurrency tools. No signup, no tracking, no wallet connection.

Crypto Profit Calculator

Calculate P&L, ROI, and net profit for crypto trades. Factor in fees.

Mining Profitability

Estimate mining profits from hashrate, power cost, and coin price.

Gas Fee Calculator

Estimate ETH and L2 transaction costs. Presets for common operations.

Wallet Address Validator

Validate BTC, ETH, and SOL addresses. Check format and checksums.

Seed Phrase Generator

Generate BIP39 mnemonic seed phrases. 12 or 24 words. Browser-only.

Crypto Unit Converter

Convert between denominations — BTC/sats, ETH/gwei/wei, SOL/lamports.

DCA Calculator

Model dollar cost averaging returns. Average cost basis, total accumulation.

Staking Rewards Calculator

Project staking yields with compound interest. Multiple compounding periods.

Market Cap Calculator

Calculate market cap, FDV, and rank estimates from price and supply.

Portfolio Tracker

Track crypto holdings with P&L. Data stored locally in your browser.

Token Metadata Generator

AI generates ERC20/ERC721/BEP20 metadata JSON for your crypto token.

Contract ABI Decoder

Decode smart contract function calls from ABI JSON + transaction data.

Transaction Decoder

Decode raw BTC and ETH transactions into human-readable format.

NFT Rarity Ranker

Rank NFTs by trait rarity from metadata. Statistical rarity scoring.

Crypto Tax Lot Calculator

Calculate FIFO capital gains across multiple buy lots and disposals.

About Crypto Tools

All 15 crypto tools are free, private, and browser-based. No wallet connection required. No data leaves your device. Use them for portfolio tracking, tax calculations, mining profitability, and blockchain development — no signup needed.

100% Free

Every crypto tool is completely free. No signup, no account, no hidden fees.

Private & Secure

All calculations happen in your browser. No wallet connection needed. Your data never leaves your device.

No Wallet Required

Use these tools without connecting any wallet or signing any transaction. Safe and risk-free.

Developer Friendly

ABI decoder, transaction decoder, and metadata generator for blockchain developers.