Structural diff of two JSON values: dotted-path lists of added, removed and changed fields, plus an equal flag. Input JSON strings or objects.

Convert a timestamp between unix seconds and ISO-8601 (UTC) in either direction: {value, from:unix|iso, to:unix|iso}. Timezone-safe date math for scheduling, logs and on-chain timestamps.

Validate whether an input string is well-formed JSON. Returns a valid flag and a parser error message when invalid.

Compute the MD5 hash (hex digest) of an input string. Fast, deterministic checksums and legacy fingerprints (not for security-sensitive hashing).

Compute an HMAC signature (hex) of an input string with a secret key. Supports sha256, sha512 and other algorithms — for webhook signing and message authentication.

Compare two semantic version strings. Returns -1, 0 or 1 for less-than, equal or greater-than.

EIP-55 mixed-case checksum for a 20-byte EVM (Ethereum/Base) hex address, via Keccak-256. Normalize and verify addresses before a transfer.

Generate a random RFC 4122 version 4 UUID. Unique identifiers for records, requests and idempotency keys.

Diff two texts offline (LCS-based): the added and removed lines, a count of changed line-pairs, added/removed word tallies and a 0-1 similarity ratio. Key-less, instant, $0.002.

Extractive summary of any text, computed offline (no LLM): ranks sentences by term significance and returns the top ones in reading order. Set how many sentences you want. Key-less, instant, $0.002.

Crypto market sentiment in one call: the Fear & Greed index (0-100 with classification) plus global market stats — total market cap, 24h volume, BTC/ETH dominance and 24h change. Free public data, $0.002.

Base58-encode bytes with the Bitcoin/Solana alphabet (no 0, O, I, l) — the encoding behind BTC and Solana addresses.

Hex-decode a hex string (optional 0x prefix) back to bytes, returned as UTF-8 (when printable) and base64. Rejects odd-length or non-hex input.

RFC 3986 percent-encode an input string for safe use in URLs, query strings and path segments (spaces become %20).

Hex-encode an input string (bytes to lowercase hex). Binary-safe representation for wire formats, hashes and calldata.

Base58-decode a Bitcoin/Solana string to raw bytes, returned as hex and base64. Rejects invalid symbols.

Base64-encode an input string. Standard encoding for binary-safe transport of text and data.

Extract the top keywords and key phrases from text (frequency, stopword-filtered) plus structured entities by pattern — emails, URLs, @mentions, #hashtags, phones, money, dates and 0x crypto addresses. Offline, key-less, $0.002.

Full domain intelligence via RDAP (the registries' official WHOIS successor): registration and expiry dates with computed age, registrar, EPP status codes, nameservers, DNSSEC — plus derived risk flags (newly registered, hold status, expiring) and a clean availability answer for unregistered domains. Registry data, structured JSON, no scraping.

Analyze any text in one call: detected language (with script + confidence), readability (Flesch Reading Ease & Flesch-Kincaid grade with reading level) and full statistics — word/sentence/paragraph counts, reading time, lexical diversity. Offline, key-less, $0.002.