Interactive instruments for Bitcoiners.

Conversions, projections, accumulation plans.

• ⚡ calculator

  Bitcoin Fee Estimator

  Estimate on-chain Bitcoin transaction fees for any wallet type and priority — with live mempool rates and USD conversion. No tracking.

• ⛏️ calculator

  Bitcoin Mining Profitability Calculator

  Estimate daily BTC mining revenue and profit from your hashrate, ASIC efficiency, and electricity cost. Live BTC price, current network parameters.

• 📅 calculator

  DCA Calculator

  Backtest dollar-cost-averaging into Bitcoin. Set your weekly or monthly amount and date range — see total sats stacked and value today.

• 🪙 calculator

  HODL Calculator

  See what a past Bitcoin purchase would be worth today — yearly USD averages 2010-2025, client-side math, live price from coingecko.

• 📉 calculator

  Inflation vs Bitcoin

  See how much US dollar purchasing power has eroded since a chosen year — and what the same money would be worth today if held in Bitcoin instead.

• ⚡ calculator

  Lightning Fee Calculator

  Estimate Lightning Network routing fees for any payment size. Adjustable hops, base fee, and ppm for realistic channel-policy scenarios.

• 🔁 calculator

  RBF Fee Bumper

  Replace-by-fee calculator for stuck Bitcoin transactions. Enter original fee and desired rate — see the minimum valid replacement per BIP 125.

• 🌴 calculator

  Retirement in Sats

  Estimate the sats you'd need to retire in cities worldwide — Bangkok, Lisbon, Tokyo, and more. Adjustable withdrawal rate, multiple price scenarios.

• 💱 calculator

  Sats Converter

  Convert sats, BTC, and fiat with live Bitcoin prices. All math runs client-side in your browser — no tracking. Permalinks for easy sharing.

• 📈 calculator

  Stacking Plan

  Plan your sats accumulation. Set a goal and deadline; see exactly how much to stack daily, weekly, or monthly at the current Bitcoin price.

Read what an invoice, address, or script actually contains.

• ⚡ decoder

  BOLT 12 Offer Decoder

  Decode BOLT 12 Lightning offers, invoices, and invoice-requests. The successor to BOLT 11 — supports static reusable offers and onion messages.

• 🧾 decoder

  Lightning Invoice Decoder (BOLT 11)

  Paste a BOLT 11 Lightning invoice and see the amount, network, description, and expiry at a glance. Runs in your browser — no keys ever sent.

Verify checksums and formats — never trust, verify.

• 🌱 validator

  BIP-39 Validator

  Paste a 12/15/18/21/24-word seed phrase. We check every word against the BIP-39 list and SHA-256-verify the checksum. Runs in your browser.

• 🔍 validator

  Bitcoin Address Validator

  Paste any Bitcoin address and instantly see its type — Legacy, SegWit, or Taproot — with checksum verification. Runs client-side in your browser.

• 🔧 validator

  Exchange legit checker

  Search 30+ major exchanges. See verified licenses, proof-of-reserves status, documented incidents, and warning flags for collapsed or fraudulent exchanges.

• 🔧 validator

  Lightning address verifier

  Paste a Lightning address (alice@domain), fetch the LNURL-pay endpoint, validate the response, and cross-check against known providers. Catches typosquats.

• ✨ validator

  Vanity Bitcoin Address Generator

  Generate a Bitcoin Native SegWit address with a chosen short prefix. 100% client-side — your private key never leaves the browser.

• 🔧 validator

  Wallet installer SHA-256 verifier (Ledger, Trezor, Sparrow)

  Drag any wallet installer to compute its SHA-256 in your browser, then compare against the vendor's official hash. Catch tampered or fake downloads.

See on-chain and network data at a glance.

• 🏊 visualizer

  Bitcoin Mining Pool Comparison 2026

  Compare Bitcoin mining pools side-by-side: payout schemes (FPPS, PPLNS, TIDES), fees, Stratum V2 support, and decentralization signals.

• 📐 visualizer

  Bitcoin Power Law Projection

  Visualize the Bitcoin power law model — support, fair value, and resistance bands projected through 2050. Educational, open-methodology, not a prediction.