ABI decode by types. Decode ABI-encoded data (calldata body or return data) against a type list like address,uint256 - typed values out.

ABI encode. Encode Solidity function arguments into EVM calldata: give a signature like transfer(address,uint256) and values, get the full 0x calldata.

Multi-chain address detector. Detect which blockchain an address belongs to: EVM, Bitcoin (legacy/SegWit/Taproot), Solana, Tron, XRP, Litecoin, Dogecoin, Cosmos-family - with checksum verification.

Age calculator. Calculate exact age in years, months and days from a birth date to today or a given date.

Exact money splitter. Split an amount by percentages or ratios with largest-remainder rounding so cents always sum exactly - invoices, revenue shares, bills.

AMM swap quote (x·y=k). Constant-product AMM math: output amount, execution price and price impact for a swap given pool reserves and fee - Uniswap V2-style.

Amortization schedule. Full month-by-month loan amortization table: payment, principal, interest and remaining balance per period - mortgages and business loans.

APR ↔ APY converter. Convert between APR and APY at any compounding frequency (daily, weekly, continuous) - staking, lending and vault yields.

Ask (cheapest). Rock-bottom-cost inference for high-volume, simple tasks. Powered by meta-llama/llama-3.3-70b-instruct. Max 600 output tokens.

Ask (fast). One-shot question to a fast, cheap frontier model. Great for quick reasoning, extraction, classification. Powered by openai/gpt-4o-mini. Max 800 output tokens.

Ask (smart). One-shot question to a strong frontier reasoning model (latest Claude Sonnet). For harder analysis, writing, and code. Powered by anthropic/claude-sonnet-4.5. Max 1200 output tokens.

Number base converter. Convert numbers between bases 2-36: binary, octal, decimal, hexadecimal and any custom radix.

Base58 encode / decode. Encode hex or text to Base58 (Bitcoin alphabet) and decode Base58 back to hex - addresses, IPFS CIDs, short IDs.

Base64 decode. Decode Base64 (standard or URL-safe) back to UTF-8 text.

Base64 encode. Encode text or UTF-8 data to Base64, with optional URL-safe alphabet.

Basis points converter. Convert between basis points, percent and decimal, and apply bps to an amount - fees, spreads, rate moves.

Bearing between coordinates. Initial compass bearing from one lat/lon point to another, in degrees and cardinal direction (N, NE, ESE...).

Block time estimator. Estimate the wall-clock time between two block numbers, or which block lands at a future time, per chain (Ethereum 12s, Base 2s, Arbitrum 0.25s...).

BMI calculator. Body mass index from weight and height (metric or imperial) with WHO category.

BMR and TDEE calculator. Basal metabolic rate (Mifflin-St Jeor) and total daily energy expenditure by activity level - nutrition planning.

Bounding box around a point. Compute the min/max lat-lon bounding box around a center point for a given radius - geo search filters and map viewports.

Break-even calculator. Find the break-even point in units and revenue from fixed costs, variable cost per unit and price per unit.

Bitcoin address validator. Validate Bitcoin addresses: legacy Base58Check (1..., 3...) with checksum, and SegWit/Taproot bech32 (bc1q..., bc1p...).

Bitcoin unit converter. Convert between satoshis, bits, mBTC and BTC with exact integer math.

Business days between dates. Count business days (Monday-Friday) between two dates, excluding weekends.

bytes32 ↔ string. Convert between Solidity bytes32 hex and UTF-8 strings (right-padded), both directions.

CAGR calculator. Compound annual growth rate between a start and end value over N years - the standard growth comparison metric.

CAIP-2/10 identifier parser. Parse and build CAIP chain and account identifiers like eip155:8453:0x... - the cross-chain standard used by WalletConnect and wallet APIs.

EVM calldata splitter. Split raw EVM transaction calldata into the 4-byte function selector and its 32-byte argument words for inspection.

EVM chain ID lookup. Look up EVM chain IDs offline: Ethereum, Base, Arbitrum, OP, Polygon, BSC, Avalanche and testnets - by ID or name.

Change text case. Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, lower and UPPER.

CIDR subnet calculator. Subnet math for IPv4 CIDR blocks: network, broadcast, usable host range, mask, host count - and whether an IP is inside.

Combinations and permutations. Exact nCr, nPr and factorials with BigInt precision - probability, sampling, lottery odds.

Compound interest calculator. Compute compound interest growth: final amount, total interest earned, with any compounding frequency and optional monthly contributions.

WCAG contrast checker. Compute the WCAG contrast ratio between two colors and whether they pass AA / AAA accessibility for normal and large text.

CSV / JSON / YAML converter. Convert data between CSV, JSON and YAML in one call. CSV parsing with headers and type inference; YAML-safe loading; pretty or compact JSON out. For bots holding data in the wrong container.

Cooking measurement converter. Convert cooking measures between cups, tablespoons, teaspoons, ml and grams for common ingredients (flour, sugar, butter, rice...).

Coordinate validator. Validate latitude/longitude values and normalize various formats to clean decimal degrees.

CRC32 checksum. Compute the CRC32 checksum of text - fast integrity checks and legacy compatibility.

CREATE contract address. Compute the contract address deployed by an account at a given nonce (CREATE opcode: keccak(rlp(sender, nonce))).

CREATE2 contract address. Compute a deterministic CREATE2 contract address from deployer, salt and init-code hash (EIP-1014) - counterfactual deployments.

Cron next runs. Parse a 5-field cron expression and return the next N run times in UTC - schedule debugging for agents and ops.

Crop yield converter. Convert crop yields between bushels/acre, tonnes/hectare, kg/ha and maunds/acre for major crops - corn, wheat, soybeans, rice.

CSV to JSON. Parse CSV (or TSV) text into a JSON array of row objects, with headers, type inference and delimiter detection.

Currency formatter. Format a number as currency in any ISO code and locale: USD, EUR, PKR, JPY - proper symbols, separators and decimals.

Date add / subtract. Add or subtract days, hours, minutes, months or years from a date; negative amounts subtract.

Date difference. Compute the difference between two dates in days, hours, minutes, seconds and a human-readable breakdown.

Format date. Format a date into common patterns: long, short, monthly, weekday, or a custom locale - multilingual output supported.

DCA cost basis calculator. Average cost basis, total units and P/L from a series of periodic buys at different prices - dollar-cost-averaging tracker.

DCAD calculator (dairy nutrition). Dietary cation-anion difference from Na, K, Cl, S percentages of dry matter - transition cow rations and milk fever prevention. Returns mEq/100g DM.