Validation & parsing

Inspect embedded Authenticode signatures in EXE, DLL, and MSI files.

Validate if a date is after another date or the current date using the validator.js isAfter function

Validate magnet links and parse their components. Check if a magnet URI is properly formatted and extract information like info hash, display name, and tracker URLs.

Validate Bitcoin (BTC) wallet addresses and check if they are properly formatted according to Bitcoin network standards.

Read ICS calendar files online to inspect event details like start and end times, locations, organizers, and descriptions.

Validate and parse CURL commands.

Validate number with Verhoeff algorithm.

Validate and parse Estonian personal identification code.

Validate Finnish social security numbers and extract details like birth date, age, and gender.

Validate and parse French Social Security Numbers (NIR). Extract gender, birth year, month, location, and control key.

Generate the Luhn check digit and completed sequence for a base number.

Validate number using Damm algorithm.

Validate and parse ISBN number.

Parse and validate IBAN.

Validate VAT (Value Added Tax) numbers.

Parse phone numbers to get additional information like country code.

Extract and format phone numbers from any text using libphonenumber-js. Supports international formats with E.164, RFC 3966, and national formatting options.

Validate numbers with Luhn algorithm.

Validates the syntax and structure of JSON.

Validate if an IP address follows the correct IPv4 format with four octets separated by dots.

Auto-detect writing systems (Cyrillic, Latin, Arabic, CJK, etc.) and identify mixed-script text.

Parse a domain name into its registrable domain, subdomain, second-level domain (SLD), and top-level domain (TLD) using the Public Suffix List.

Validate URLs against robots.txt rules. Check if a URL is allowed or disallowed for specific user-agents, view crawl delays, and find sitemap references.

Describe what you want in plain English and get SQL for MySQL, PostgreSQL, or SQLite with built-in validation.

Extract metadata like duration, dimensions, file size, and format from video files.

Analyze and inspect X.509 SSL/TLS certificates. View certificate details including subject, issuer, validity period, extensions, key usage, and fingerprints.

Validate HTTP response and request headers against RFC standards. Check for syntax errors, deprecated headers, missing security headers, and common misconfigurations.

Validate and parse raw HTTP request text with detailed request metadata.

Test your iPhone front and rear cameras with live preview, resolution checks, and snapshots.

Identify the country of a phone number with flag display, calling code, and number validation

Parse and analyze SSH public keys. Extract key type, algorithm, key size, fingerprints (SHA-256, MD5), and comments from OpenSSH public keys.

Validate IATA airport codes and look up the matching airport details.

Validate ICAO airport codes and look up the matching airport details.

Validate sitemap XML files. Checks structure, namespace, URL format, lastmod dates, changefreq values, and priority ranges.

Check any YouTube video for community-submitted SponsorBlock segments (sponsor spots, intros, outros, and more).

Check the estimated like and dislike counts for any YouTube video, restored via the Return YouTube Dislike API.

Validate SPDX license identifiers, check for deprecated licenses, and browse the full list of standard open-source license IDs.

Enter a website URL and the server fetches and validates its robots.txt, showing sitemaps, crawl delay, and preferred host.

Preview how a URL will look when shared on Facebook, Twitter/X, LinkedIn and other platforms by inspecting its Open Graph and Twitter Card meta tags.

Fetch a page and check its hreflang tags for missing x-default, invalid language codes, duplicates, and self-referencing errors.

Enter a URL and the server fetches the page, extracts every JSON-LD structured data block, and checks it for JSON syntax errors, missing @context and @type, unknown schema.org types and properties, and fields Google needs for rich results.