#dev-tools

A fast, fully-local astronomy and ephemeris engine: compute the equatorial (right-ascension/declination) and horizontal (azimuth/altitude) positions of the Sun, Moon and all planets for any observer and moment, get precise rise, set and transit (culmination) times for any body, read detailed lunar state (phase angle, named phase, illuminated fraction, apparent magnitude, geocentric distance, age since the last new moon and the dates of the next new/first-quarter/full/last-quarter moons), and list the exact equinoxes and solstices of any year. Every endpoint accepts input via the query string or the request body. Pure server-side computation (no third-party upstream), so responses are instant and always available. Ideal for weather and tide apps, astrophotography planners, calendars, solar/energy tools, Islamic and lunar calendars, and education.

api.oanor.com/astronomy-api

Work with geohashes through a fast, fully-local API. Encode a latitude/longitude pair into a geohash at any precision (1–12), decode a geohash back to its centre coordinates with the exact bounding box and error margins, list the eight neighbouring geohash cells (north, north-east, east and so on), or get the bounding box, centre and dimensions of a cell. Geohashes turn coordinates into short sortable strings that are perfect for spatial indexing, proximity grouping and map tiling. Pure server-side computation with no third-party upstream, so responses are instant and the service is always available. Ideal for geospatial indexing and search, proximity and nearby queries, map tiles and clustering, IoT and fleet tracking, and location bucketing in databases.

api.oanor.com/geohash-api

Hash and verify passwords with bcrypt, server-side. Generate a salted bcrypt hash at a cost factor you choose (4–14), check a plaintext password against an existing hash, or inspect a hash to read its bcrypt version, cost factor and salt. Fully compatible with bcrypt hashes from PHP ($2y$), Node, Python and others, so you can verify and migrate existing credentials. Pure server-side computation with no third-party upstream, so it is always available — and it offloads the deliberately CPU-intensive hashing work from your own servers. Ideal for adding password authentication, credential migration, auth tooling, testing and no-code backends.

api.oanor.com/bcrypt-api

Python package data from PyPI as clean JSON. Look up any package’s latest metadata — version, summary, license, repository, author, keywords, required Python version, dependencies, supported Python versions and total release count — browse its full version history with release dates and yanked flags, or get the details and distribution files for one specific version. Sourced live from the public Python Package Index and returned through a fast, reliable API. Ideal for developer dashboards and tooling, package and dependency analytics, security and supply-chain checks, CI/CD and documentation sites.

api.oanor.com/pypi-api

Identifique o fabricante por trás de qualquer endereço MAC. Consulte um MAC ou OUI para obter o fornecedor atribuído, seu nome abreviado e o bloco de atribuição exato (/24, /28 ou /36) usando o registro oficial da IEEE, pesquise no registro pelo nome do fornecedor para encontrar todos os OUIs de uma empresa, ou gere endereços MAC de teste aleatórios válidos para um determinado fornecedor. Endereços MAC são aceitos em todos os formatos comuns — dois pontos, hífen, ponto ou hexa simples — e OUIs simples também funcionam. Construído sobre o conjunto de dados aberto IEEE OUI (~57.000 atribuições) e servido inteiramente em memória, as respostas são instantâneas e o serviço está sempre disponível. Ideal para varredura e monitoramento de rede, identificação de IoT e dispositivos, segurança e inventário de ativos, NAC e ferramentas de devops.

api.oanor.com/macvendor-api

Parse any hostname or URL with the Public Suffix List. Split a domain into its subdomain, registrable domain (eTLD+1) and public suffix (eTLD), or fetch just the suffix or just the registrable domain. Handles full URLs, internationalized (punycode) domains, IP addresses, multi-level suffixes like co.uk and com.au, and — when you ask for it — private suffixes such as github.io and s3 buckets. Built on an always-current Public Suffix List and served entirely in-memory, so responses are instant and the service is always available. Ideal for cookie and domain scoping, analytics attribution, email and link validation, security and anti-abuse, and devops tooling.

api.oanor.com/domain-api

Stopword lists and removal for 58 languages. Fetch the full stopword list for a language, see all supported languages with their word counts, check whether a single word is a stopword, or strip stopwords out of a block of text to get a clean keyword stream. Built on the open stopwords-iso dataset and served entirely in-memory, so responses are instant and the service is always available. Ideal for search indexing and relevance, NLP preprocessing and text mining, keyword extraction, tag generation and content tooling.

api.oanor.com/stopwords-api

Everything about npm packages in one clean API. Look up a package’s latest metadata — version, description, license, homepage, repository, author, keywords, dist-tags, dependencies and maintainers — list its full version history with release dates, pull download statistics for the last day, week, month or year, and search the registry across more than three million packages. Sourced live from the public npm registry and returned as tidy JSON through a fast, reliable API. Ideal for developer dashboards and tooling, package and dependency analytics, supply-chain and security checks, CI/CD and documentation sites.

api.oanor.com/npm-api

Query and extract from JSON with JSONPath, server-side. Run any JSONPath expression — wildcards, recursive descent, array slices and filter expressions like [?(@.price>10)] — against a JSON document and get back the matched values, the normalized paths and JSON Pointers of every match, or just the first match. Filter expressions are evaluated in a safe sandbox with no access to globals, and inputs can be sent as a JSON POST body or a query parameter. Pure local compute with no third-party upstream, so responses are instant and the service is always available. Ideal for no-code and automation platforms, ETL and data pipelines, API integrations, testing and config extraction.

api.oanor.com/jsonpath-api

Convert, validate and tidy YAML through a fast, fully-local API. Turn YAML into JSON (including multi-document streams) or JSON into clean YAML with optional key sorting and custom indentation, validate a document and get the exact line and column of any syntax error with a context snippet, or reformat and normalize existing YAML. Inputs can be sent as a raw text/plain body, a JSON field or a query parameter; outputs are tidy JSON. Pure server-side compute with no third-party upstream, so responses are instant and the service is always available. Ideal for DevOps and CI/CD, configuration and infrastructure-as-code tooling, no-code platforms, editors and data pipelines.

api.oanor.com/yaml-api

Validate JSON against JSON Schema, server-side. Check any data against a schema (Draft-07 or 2020-12) and get a clear pass/fail plus a detailed list of every error with its instance path, failing keyword and message; verify that a schema itself is well-formed; or infer a starter JSON Schema automatically from a sample document, complete with detected formats like email, URI and date. Built on the battle-tested Ajv engine with full format validation. Every endpoint accepts GET (JSON-encoded parameters) or a JSON POST body and runs entirely locally with no third-party upstream, so responses are instant and the service is always available. Ideal for API request/response validation, form and data-entry checks, ETL and data-quality pipelines, no-code platforms and contract testing.

api.oanor.com/jsonschema-api

Ejecuta expresiones regulares del lado del servidor sin el riesgo de ReDoS. Prueba si un patrón coincide, extrae todas las coincidencias con sus posiciones y grupos de captura (numerados y nombrados), reemplaza con un patrón de sustitución o divide texto, todo con los conocidos indicadores de expresiones regulares de JavaScript (g, i, m, s, u, y). Cada evaluación se ejecuta en un entorno aislado con un tiempo de espera máximo estricto, por lo que un patrón de retroceso catastrófico nunca puede bloquear tu servicio; en su lugar, obtienes un claro error de tiempo de espera. Las entradas aceptan parámetros de consulta GET o un cuerpo JSON POST. Cómputo local puro sin terceros ascendentes, por lo que las respuestas son instantáneas y el servicio siempre está disponible. Ideal para plataformas sin código y de automatización, tuberías de limpieza de datos, validación de formularios y entradas, análisis de registros y herramientas de contenido.

api.oanor.com/regex-api

Compare two pieces of text and get a precise, structured diff. Choose line, word or character granularity for a full edit script (equal, inserted, deleted) with addition and deletion counts, get a compact inline word diff, or render a standard unified diff (patch) with configurable context lines and file labels — ready to feed into patch tooling or a code-review UI. Built on a Longest-Common-Subsequence algorithm for accurate, minimal diffs. Every endpoint works by GET or JSON POST and runs entirely server-side with no third-party upstream, so responses are instant and the service is always available. Ideal for code review and version tooling, CMS and document editors, change tracking, plagiarism highlighting and content audits.

api.oanor.com/textdiff-api

A fast, fully-local SVG generator for mockups and UIs: placeholder images (a sized rectangle with centered text and automatic contrast), initials avatars (with a deterministic colour derived from the name, in a circle or square), and identicon-style symmetric patterns generated deterministically from any seed. Every endpoint returns the JSON envelope or, with raw=1, the raw SVG so the URL can be used directly as an image source. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for prototypes, dashboards, user avatars, empty states and design systems.

api.oanor.com/placeholder-api

Un kit de dados rápido y completamente local para juegos y simulaciones: lanza notación de dados (NdM con modificadores de suma y resta, múltiples términos de dados como 1d8+1d6+2, y mantener el más alto o el más bajo para ventaja y desventaja como 2d20kh1), analiza y valida una notación, y calcula el mínimo, máximo y media deterministas de una tirada. Las tiradas utilizan una fuente aleatoria criptográficamente segura. Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud. Cálculo puro del lado del servidor, sin terceros upstream, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para herramientas de mesa y RPG, bots de Discord y chat, mesas virtuales y backends de juegos.

api.oanor.com/dice-api

A fast, fully-local cron-expression toolkit (UTC): validate 5-field cron expressions with ranges, lists, steps, month and weekday names and the common @aliases (@yearly, @monthly, @weekly, @daily, @hourly); compute the next N run times for a schedule from now or any start date; and describe a schedule in plain English. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for schedulers and job runners, devops and CI tooling, and dashboards that show the next run time of a task.

api.oanor.com/cron-api

A fast, fully-local JSON Web Token toolkit: sign a JSON payload into a JWT, verify a token signature together with its exp and nbf claims using a constant-time comparison, and decode a token header and payload without verifying. Supports the HMAC algorithms HS256, HS384 and HS512, automatically adds the iat claim and an exp claim from expires_in. Built on Node crypto and secrets are never logged, so responses are instant, private and always available. Every endpoint accepts input via the query string or the request body. Ideal for authentication, API gateways, session and token tooling, microservices and webhooks.

api.oanor.com/jwt-api

Un kit de herramientas rápido y completamente local para la generación de identificadores: cree UUID v4 (aleatorio), v7 (ordenado por tiempo y lexicográficamente ordenable), v3 y v5 (basados en nombre, deterministas mediante MD5 y SHA-1 sobre un espacio de nombres más un nombre) y el UUID nulo; genere ULID (ordenables, base32 de Crockford); genere nanoids (seguros para URL, con alfabeto y tamaño personalizados); y valide cualquier UUID, informando su versión y variante. Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud. Construido sobre Node crypto, sin terceros upstream, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para bases de datos y claves primarias, sistemas distribuidos, claves de idempotencia y correlación, y herramientas generales para desarrolladores.

api.oanor.com/uuid-api

Un toolkit rápido y completamente local para MIME y tipos de archivo: busque el tipo MIME, el conjunto de caracteres y la categoría de un nombre de archivo o extensión, enumere todas las extensiones de archivo registradas para un tipo MIME y detecte el tipo real de un archivo a partir de sus bytes mágicos principales (más de 40 firmas, incluida la desambiguación de contenedores RIFF para WEBP, WAV y AVI), aceptando entrada hexadecimal o base64. Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud. Cálculo puro del lado del servidor, sin terceros ascendentes, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para validación de carga, seguridad (verificar el tipo real de un archivo contra su extensión declarada), CDN y canalizaciones de contenido.

api.oanor.com/mime-api

A fast, fully-local number toolkit: spell numbers out in English words (great for amount-in-words on invoices and cheques), format ordinals (1st, 2nd, 112th), convert integers to and from Roman numerals (1 to 3999), convert numbers between any bases from 2 to 36, and format numbers locale-aware as decimal, currency or percent. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for invoicing and billing, localization, education and developer formatting tooling.

api.oanor.com/number-api

Una calculadora de IP y subred rápida y completamente local: valida direcciones IPv4 e IPv6 con clasificación de tipo (privada, pública, loopback, link-local, multicast, CGNAT o reservada), calcula detalles de subred CIDR (red, máscara de red, wildcard, broadcast, primer y último host, direcciones totales y hosts utilizables, con tamaño de red y rango IPv6), verifica si una dirección está dentro de un bloque CIDR y convierte direcciones (IPv4 a entero, hexadecimal y binario; expandir y comprimir IPv6). Cada endpoint acepta entrada mediante la cadena de consulta o el cuerpo de la solicitud. Cálculo puro del lado del servidor, sin terceros upstream, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para devops, automatización de redes, IPAM, herramientas de firewall y ACL, e infraestructura en la nube.

api.oanor.com/subnet-api

Un kit de herramientas de datos CSV rápido y completamente local: analiza CSV en objetos de fila tipados (RFC-4180), calcula estadísticas por columna (recuento, únicos, tipo y valores principales, y para columnas numéricas mínimo, máximo, media, mediana y suma), elimina filas duplicadas por todas o un subconjunto de columnas, ordena por una columna con ordenación numérica, y filtra filas por una condición (igual, no igual, mayor/menor que, contiene, comienza con, vacío, no vacío). Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud, hasta 2 MB, y devuelve tanto objetos de fila como una cadena CSV. Cómputo puro del lado del servidor, sin terceros externos, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para manipulación de datos, ETL, preparación de análisis, herramientas de hojas de cálculo y limpieza de datos. (Para conversión simple de CSV a JSON, consulte la API JSON de oanor.)

api.oanor.com/csv-api

Un toolkit XML rápido y completamente local: convierte XML a JSON y JSON a XML con manejo configurable de atributos, valida la buena formación de XML con detalles de error de línea y columna, y embellece XML preservando el orden de los elementos. Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud, hasta 2 MB. Cómputo puro del lado del servidor, sin terceros ascendentes, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para integraciones de sistemas, interoperabilidad SOAP y heredada, procesamiento de RSS y sitemaps, herramientas de configuración y tuberías de datos.

api.oanor.com/xml-api

A fast, fully-local HTML toolkit: extract structured data from supplied HTML (title, meta description, canonical link, language, Open Graph and Twitter card tags, links, images, headings and word counts), convert HTML to readable plain text, list all links resolved against a base URL, and sanitize HTML with a strict allowlist (scripts, iframes, inline event handlers, javascript: URLs and unknown tags are stripped). It works on the HTML you send and never fetches URLs (for live link previews see the oanor URL Tools API). Input via the query string or the request body, up to 2 MB. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for scrapers and data pipelines, comment and email sanitization, RAG and content extraction, and CMS tooling.

api.oanor.com/html-api

A fast, fully-local date and time toolkit (UTC): parse any date string or unix timestamp into ISO, unix and components with the ISO week number, day-of-year and leap-year flag; format dates with custom tokens (YYYY-MM-DD, weekday and month names, and more); add or subtract month-aware durations; compute the difference between two dates in every unit plus a human-readable summary; and convert between unix timestamps and ISO. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for scheduling, billing periods, reminders, analytics and any date arithmetic. (For the current time in a specific timezone, see the oanor Time API.)

api.oanor.com/datetime-api

A fast, fully-local string similarity and fuzzy-matching toolkit: edit distances (Levenshtein, Damerau-Levenshtein, Hamming), normalized 0-1 similarity scores (Levenshtein ratio, Jaro, Jaro-Winkler, Dice and Jaccard), Soundex phonetic codes, and best-match ranking of a query against a candidate list. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for record matching and deduplication, search and autocomplete, spell-checking, data cleaning and entity resolution.

api.oanor.com/similarity-api

Un toolkit Markdown rápido y completamente local: renderiza Markdown al estilo GitHub a HTML que está sanitizado por defecto (se eliminan scripts, etiquetas style/iframe, manejadores de eventos en línea y URLs javascript:), convierte Markdown a texto plano limpio y extrae una tabla de contenidos de encabezados con niveles, texto y slugs de URL. Cada endpoint acepta entrada a través de la cadena de consulta o el cuerpo de la solicitud (hasta 1 MB). Cómputo puro del lado del servidor, sin terceros upstream, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para CMS y herramientas de documentación, sistemas de comentarios, pipelines de sitios estáticos y renderizado de contenido.

api.oanor.com/markdown-api

Un kit d'outils JSON et CSV rapide et entièrement local : validez du JSON (avec un message d'erreur clair, type et taille), affichez-le et formatez-le joliment (avec tri profond optionnel des clés), minifiez-le (en signalant les octets économisés), et convertissez entre CSV et JSON — analyse CSV RFC-4180 avec typage automatique des valeurs, et tableaux JSON vers CSV. Chaque point d'accès accepte l'entrée via la chaîne de requête ou le corps de la requête (jusqu'à 1 Mo). Calcul pur côté serveur, sans tiers en amont, donc les réponses sont instantanées et toujours disponibles. Idéal pour les pipelines de données, ETL, webhooks, outils de configuration et utilitaires pour développeurs.

api.oanor.com/json-api

Un parser User-Agent rápido y completamente local: detecta el navegador (nombre y versión), motor de renderizado, sistema operativo (nombre y una versión amigable), tipo de dispositivo (escritorio, móvil, tableta, TV, wearable o bot), un indicador móvil y la identidad del bot/crawler (Googlebot, Bingbot, bots de vista previa social, GPTBot/ClaudeBot, curl y más). La detección de bots está incluida en todos los planes. Cómputo puro del lado del servidor, sin terceros upstream, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para análisis, ad-tech, filtrado de fraudes y bots, personalización y registros de acceso.

api.oanor.com/useragent-api

A fast, fully-local payment-card toolkit: validate card numbers with the Luhn (mod-10) checksum, detect the brand by IIN/prefix (Visa, Mastercard including the 2-series, American Express, Discover, Diners, JCB, UnionPay, Maestro), format and mask numbers with brand-correct grouping, list supported brands with their valid lengths and CVV length, and generate synthetic Luhn-valid TEST card numbers for QA. Pure server-side compute, no third-party upstream, and inputs are never logged. It is algorithmic only (no real issuer/bank BIN-database lookup). Ideal for checkout forms, payment flows, fraud pre-checks and test fixtures.

api.oanor.com/creditcard-api

A fast, fully-local password toolkit: generate cryptographically-secure random passwords (configurable length, character classes and exclude-similar), estimate password strength (entropy bits, a 0-4 score, character-class breakdown, common-password detection, an offline crack-time estimate and actionable feedback), and create memorable diceware-style passphrases. Built on Node crypto, no third-party upstream, and inputs are never logged — so responses are instant, private and always available. Ideal for signup and account flows, admin tools, password managers and security features.

api.oanor.com/password-api

Un toolkit geoespacial de círculo máximo rápido y completamente local: calcula la distancia haversine entre dos coordenadas (en km, m, millas o millas náuticas), el rumbo inicial y final de la brújula, el punto medio geográfico, el punto de destino alcanzado desde un origen en un rumbo a una distancia dada, y un cuadro delimitador alrededor de un centro para un radio. Cómputo puro del lado del servidor, sin terceros ascendentes, por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para logística, aplicaciones de entrega y flotas, localizadores de tiendas, búsqueda de bienes raíces, herramientas de viaje y mapeo.

api.oanor.com/geo-api

A fast, fully-local text-utilities toolkit: convert between 10 case styles (upper, lower, title, sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case), generate URL-friendly slugs, compute text statistics (word, character, sentence, line and paragraph counts, average word length and reading time), and produce lorem-ipsum placeholder text by words, sentences or paragraphs. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for CMS, editors, developer tools, forms and content pipelines.

api.oanor.com/text-api

A fast, fully-local encoding toolkit: encode and decode text between base64, base64url, base32 (RFC 4648), hex, URL percent-encoding, HTML entities, binary and ASCII85 — plus JWT inspection (decode header and payload without verifying the signature). Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for developer tools, webhooks, data pipelines, debugging and integrations.

api.oanor.com/encoding-api

Conversión de unidades rápida y determinista en 10 categorías: longitud, masa, temperatura, área, volumen, velocidad, tiempo, almacenamiento digital, presión y energía. Convierta cualquier valor entre unidades compatibles y enumere el catálogo completo de unidades por categoría. Cómputo completamente local (sin terceros externos), por lo que las respuestas son instantáneas y siempre están disponibles. Ideal para calculadoras, comercio electrónico, logística, herramientas de ingeniería, paneles de control y chatbots.

api.oanor.com/unit-api

Compute cryptographic hashes (MD5, SHA-1, SHA-256/384/512, SHA-3, RIPEMD-160) in hex or base64, generate HMAC signatures for webhook and message authentication, and mint v4 UUIDs. All server-side and deterministic. Handy for integrity checks, signing, cache keys, deduplication and id generation.

api.oanor.com/hash-api

Genera datos falsos realistas: usuarios, direcciones postales, empresas y productos, para pruebas, prototipos, demostraciones y siembra de bases de datos. Localizable a muchos idiomas y regiones para nombres, direcciones y números de teléfono. Llamadas deterministas y del lado del servidor, ideal para fixtures de CI y estados mock del frontend.

api.oanor.com/mockdata-api

Generate barcodes as PNG images — EAN-13, EAN-8, UPC-A/E, Code 128, Code 39, ITF-14, ISBN and 2D codes (QR, Data Matrix, PDF417, Aztec) — returned as base64 or a raw image, with adjustable size and human-readable text. Fully server-side. Perfect for retail, inventory, shipping labels, ticketing and asset tracking.

api.oanor.com/barcode-api

Busca en Stack Overflow y la red Stack Exchange: preguntas por relevancia con puntuaciones, recuento de respuestas y etiquetas, detalles completos de preguntas y perfiles de usuario con reputación, insignias y ubicación. Ideal para herramientas de desarrollo, monitoreo de tendencias tecnológicas, agregación de preguntas y respuestas y consultas de reputación.

api.oanor.com/stackexchange-api

Find words by meaning, sound and spelling — similar-meaning words (thesaurus), rhymes, autocomplete suggestions and wildcard spelling matches. Backed by Datamuse. Ideal for writing assistants, autocomplete, crosswords, word games, poetry tools and NLP preprocessing.

api.oanor.com/words-api