mainnet 11:54:29 UTC
v1.0 — live

Crypto tools
that just work.
No bullshit.

A free, browser-native toolkit for everyone working on-chain. Convert units, validate addresses, calculate gas — 100% client-side, no wallet connection, no API keys, no friction.

Browse tools → How it works ↓
✓100% client-side ✓no wallet required ✓no API keys
/SYS ━━━━━━━━ SCANNING DENOMINATIONS
●LIVE
EXP10^00
RANGE[ 0 — 18 ]
10^00 wei
10^01
10^02
10^03 kwei
10^04
10^05
10^06 mwei
10^07
10^08
10^09 gwei
10^10
10^11
10^12 szabo
10^13
10^14
10^15 finney
10^16
10^17
10^18 ether
CURRENT wei
1.000000 × 10 00
= 1 wei
00001101000110
▸ /ethereum & evm — ● 4 live

Built for the EVM stack.

/01

ETH unit converter

Convert between wei, gwei, szabo, finney, ether and everything in between. BigInt-precise, no floating point trickery.

[ wei ←→ gwei ←→ ether ]
7 unitsBigInt-safeno deps
→
/02

Address validator

EIP-55 checksum verification and contract-vs-wallet detection across 11 EVM chains. Paste any address, get the canonical form.

[ 0xAb5…3c4 ✓ valid ]
EIP-5511 chainsno key
→
/03

Gas calculator

Estimate transaction costs across mainnet, L2s, and rollups. Live basefee, priority fee modeling, USD conversions.

[ basefee ▮▮▮▯ 24 gwei ]
live basefeeEIP-155911 chains
→
/04

Token decimals

Look up ERC-20 decimals, total supply, and metadata for any token on any chain. Paste contract address, get truth.

[ 0x…→ 18 dec • 1B supply ]
ERC-20any chainno API key
→
▸ /bitcoin — ● 4 live

Built for Bitcoin only.

/05

Satoshi converter

Convert between satoshi, bits, mBTC, and BTC with BigInt precision, plus a live USD readout. Browser-only.

[ sat ←→ BTC · $live ]
BigInt-safelive USDno deps
→
/06

Bitcoin address validator

Validate any Bitcoin address — legacy (1…), P2SH (3…), native SegWit (bc1q…), Taproot (bc1p…). Bech32 and Base58Check verified locally.

[ bc1q…f3t4 ✓ P2WPKH ]
Bech32Base58CheckP2TR
→
/07

Bitcoin fee calculator

Estimate transaction fees from live mempool data — fastest, 30-min, 1-hour, economy tiers — across SegWit, Taproot, and legacy tx shapes.

[ 8 sat/vB · 141 vB → 1128 ]
live fees5 tierssat/vB
→
/08

Halving countdown

Live countdown to the next Bitcoin halving — current block height, blocks remaining, ETA, and the full reward schedule.

[ ~ 156,000 blocks left ]
live tipreward sched.public API
→
▸ /litecoin — ● 4 live

Tuned for Litecoin's pace.

/09

Litecoin converter

Convert between litoshi, photon, mLTC, and LTC with BigInt precision, plus a live USD readout.

[ litoshi ←→ LTC · $live ]
BigInt-safelive USDno deps
→
/10

Litecoin address validator

Validate any Litecoin address — legacy (L…), P2SH (M…), SegWit (ltc1q…), Taproot (ltc1p…). Flags deprecated 3-prefix addresses that collide with Bitcoin.

[ ltc1q…ajh4 ✓ P2WPKH ]
Bech32L · M · 3P2TR
→
/11

Litecoin fee calculator

Live LTC mempool fees — 5 tiers across SegWit, Taproot, and legacy shapes. 2.5-minute blocks mean fees stay low almost continuously.

[ 1 lit/vB · 141 vB → 141 ]
live fees5 tierslit/vB
→
/12

Litecoin halving countdown

Live countdown to the next Litecoin halving — current tip, blocks remaining, ETA, and the full LTC reward schedule.

[ ~ 4 yrs to halving #4 ]
live tip840k interval~4 yrs
→
▸ /solana — ● 4 live

Made for the Solana runtime.

/13

Solana converter

Convert between lamport, μSOL, mSOL, and SOL with BigInt precision, plus a live USD readout.

[ lamport ←→ SOL · $live ]
BigInt-safelive USD9 decimals
→
/14

Solana address validator

Decode and validate any Solana address. Wallets, programs, mints, and PDAs all share the same 32-byte shape. The validator confirms length and known-program identity.

[ EPjF…Dt1v ✓ public key ]
base5832 bytesknown IDs
→
/15

Solana SPL token lookup

Read on-chain SPL mint info — decimals, supply, mint authority, freeze authority. Supports both SPL Token and Token-2022 programs.

[ USDC · 6 dec · ∞ supply ]
SPLToken-2022on-chain
→
/16

Solana rent calculator

Compute the rent-exempt minimum balance for any Solana account by data size in bytes. Returns lamports, SOL, and live USD.

[ 165 B → 0.00204 SOL ]
deterministicno RPC5 presets
→
▸ /tron — ● 4 live

Wired for TRON's traffic.

/17

TRON converter

Convert between SUN and TRX with BigInt precision, plus a live USD readout. SUN is TRON's 10⁻⁶ smallest unit.

[ SUN ←→ TRX · $live ]
BigInt-safelive USD6 decimals
→
/18

TRON address validator

Validate any TRON address and convert between T-prefix Base58Check, 41-prefix hex, and EVM 0x form. Pure local, no signup.

[ T…Lj6t ✓ valid ]
Base58CheckT · 41 · 0xTVM
→
/19

TRC-20 token lookup

Read on-chain TRC-20 metadata — name, symbol, decimals, total supply — for USDT, USDC, JST, BTT and any TRON contract.

[ USDT · 6 dec ✓ ]
TRC-20TVMcached
→
/20

TRON fee calculator

Estimate TRON transaction costs in TRX and USD — including the famously cheap USDT transfer fee on TRC-20. Energy + bandwidth + activation, all in one place.

[ USDT → 13.4 TRX ≈ $1.96 ]
energybandwidthUSDT
→
▸ /ethos

Crypto tools shouldn't ask for your wallet, phone home, or hide behind a paywall. Just math, in your browser, free.

01 / Local-first
Your machine, your data.
Every computation runs client-side. No servers, no logs.
02 / Wallet-free
No connection prompts.
Reading data and doing math doesn't require signing. Ever.
03 / BigInt-safe
No floating point lies.
Native BigInt everywhere. What you see is what's on-chain.
04 / Free
No tier, no paywall.
Free to use, free to share. No accounts, no upsells, no catch.