#generator

Generate, solve and validate Sudoku puzzles through a fast, fully-local API. Create fresh puzzles at four difficulty levels (easy, medium, hard, expert), each guaranteed to have exactly one solution, returned as both an 81-character string and a 9x9 grid alongside the full solution. Solve any valid puzzle with a backtracking engine that also reports whether the solution is unique, and validate a grid to detect rule conflicts and completeness. Inputs accept an 81-character string (0 or . for blanks) or a 9x9 array, by GET or JSON POST. Pure server-side compute with no third-party upstream, so responses are instant and the service is always available. Ideal for puzzle apps and games, newspapers and printables, tutors and training-data generation.

api.oanor.com/sudoku-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

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

Genera documentos PDF a partir de texto sobre la marcha — con un título opcional en negrita, tamaño de página (A4, Carta o Legal) y tamaño de fuente. Devuelve un PDF en base64 o un archivo descargable sin procesar. Ideal para facturas, informes, recibos y boletos.

api.oanor.com/pdf-api

Genera codici QR su richiesta come PNG base64, SVG o immagine grezza incorporabile. Personalizza dimensione, margine della zona silenziosa, livello di correzione degli errori e colori di primo piano/sfondo. Codifica URL, testo, Wi-Fi, vCard e altro.

api.oanor.com/qr-api