Validate and format phone numbers globally, detect disposable numbers, providers, locations, time zones, and country details for accurate communication workflows.

This API is able to detect any spelling or grammar errors in your application. Submit text and receive a JSON response with potential errors and suggested corrections.

A Spelling and Basic Grammar Check API is a tool that allows developers to integrate spelling and grammar checking functionality into their applications

Convert numbers to perfectly formatted text across 28 languages and over 35 predefined currencies. Our API handles standard, formal, and check writing formats with support for custom currencies. Perfect for financial documents, legal contracts, invoices, and multilingual applications. Simple integration with comprehensive documentation.

It is a powerful tool for correcting the capitalization that text should have quickly and easily. With this API, you can easily format text to meet various style guidelines,

Validate Brazilian CPF, CNPJ and CNH documents with real check-digit calculation.

Convert GitHub flavored Markdown (tables, lists, code) to safe HTML. Scripts and inline handlers are stripped by default.

Compare two texts by lines, words or characters and get a structured difference plus a unified patch, like version control tools produce. Built for change tracking, reviews and audit logs.

Three everyday text tools in one place: turn any text into a clean web address slug (accent safe), get text statistics such as words, sentences and reading time, and generate placeholder paragraphs for mockups and demos.

Validate and format identity and business document numbers with correct check digit verification. Confirm whether a number is valid and generate valid sample numbers for software testing.

Comprehensive Financial Validation API for validating IFSC codes, IBANs, and US routing numbers. The IFSC validation includes format checks and optional reference lookups, while IBAN validation ensures structural integrity and checksum accuracy without confirming account existence. The routing number endpoints incorporate checksum validation alongside a FedACH-based bank directory for accurate routing information.

Detect and censor profanity in user generated text in 25+ languages, with leetspeak detection, custom blocked words and an allow list.

Score the readability of any English text. Returns Flesch-Kincaid, Gunning Fog, SMOG, ARI scores, sentence-level breakdown, improvement suggestions, and target grade pass/fail in one call.

Streamline your processes using our Document Number Format Validation Check for accurate MRZ and document number formats.

A high-performance text purification API designed for TTS workflows. Automatically cleans messy text and prevents Edge-TTS engine errors.

The Error Finder API detects grammatical, spelling and style errors, providing suggestions to improve the quality of texts in multiple languages and styles.

Boost your email campaigns' effectiveness using our Email Address Accuracy Checker API for precise validation.

Streamline complex information using the Technical Writing Technical Writing Readability API for clear communication.

Convert lightweight markup documents into clean sanitized web markup, styled print ready documents or editable word processor files, with real heading styles, lists, tables and code blocks.

Canonical injection test strings for checking your own escaping: SQL tautology, XSS, path traversal, template injection. Harmless probes, not working exploits. Reproducible seeds.

Fuzz testing input data for validation layers: malformed strings, boundary values, control characters. 16 field types, reproducible seeds; each value explains what it breaks.

Malformed and hostile string test data for input handling: control characters, null bytes, encoding edge cases. Reproducible seeds, and every value explains what it breaks.

Integer and floating-point edge cases: int32/int64 limits, NaN, infinity, denormals, and IEEE 754 rounding. Deterministic seeds, and every value explains what it breaks.

Ensure accurate speech generation with the Precision TTS Text Formatter and Purifier API, perfect for professional applications.

Validates security.txt policy files (RFC 9116) for syntax and structure. This is syntax and structure validation only; it does not verify sellers (no sellers.json cross-check) or exchange domain