Smart crypto decisions .

Swap Fee Comparator

See which service costs you less, in seconds.

CoinGeckoTry it

HotXS

Is This a Scam?

Paste a DM, URL, or offer. We flag the red flags.

Heuristic (no API)Try it

HotS

Blockchain.info + CoinGeckoTry it

Bitcoin Halving Countdown

Days, blocks, and the cycle model.

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Every tool.

15 tools · all client-side

Swap Fee Comparator

See which service costs you less, in seconds.

CoinGecko Try it

Hot XS

Heuristic (no API) Try it

Is This a Scam?

Paste a DM, URL, or offer. We flag the red flags.

Blockchain.info + CoinGecko Try it

Bitcoin Halving Countdown

Days, blocks, and the cycle model.

Bitcoin Rainbow Chart

The famous log-regression bands, interactive.

CoinGecko Try it

HaveIBeenPwned (k-anon) Try it

Password Breach Check

Check if your password was leaked. Private by design.

CoinGecko + Frankfurter + ECB Try it

Finance

EUR to Crypto True Cost

The real price after FX spread.

Lightning Network Fee Estimator

LN stats + fee calculator.

Mempool.space Try it

Stablecoin Depeg Monitor

USDC, USDT, DAI vs USD. Live.

CoinGecko Try it

Pizza Day Hodl vs Spend

If you held BTC since 2010...

CoinGecko history Try it

ISS Live Tracker

Where is the space station right now?

wheretheiss.at Try it

XS

crypto.getRandomValues (browser) Try it

Secure Password & Seed Generator

Random passwords, passphrases, BIP-39 seeds. Client-side.

None (client-side math) Try it

Finance

Position Size & Risk Calculator

Size every trade so a single loss never breaks you.

None (client-side rules) Try it

Finance

Crypto Tax Estimator

See what you owe across six countries in one click.

None (client-side compound math) Try it

Staking Rewards Calculator

Project your yield with compound interest.