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A page from the Fake Name Generator that validates US bank ABA routing numbers, checking the prefix and check digit. It explains the 3-7-1 check step by step and provides sample routing numbers for testing forms. The samples pass the tests but are otherwise random.
A GitHub wiki with notes and articles about software quality and software testing. It collects learning resources, books and courses in English and Russian, along with cheatsheets and material on tools, test runners, formal specification and other testing topics.
A page from the Fake Name Generator that checks a credit card number's network, length and Luhn check digit. It explains the Luhn check step by step and offers sample made-up numbers for testing forms. The page notes the sample numbers are not accounts and are declined by payment gateways.
ExampleFile offers free sample files for testing, including PDF, JPG, PNG, ZIP, MP4, DOCX and other formats in various sizes from 1KB to 100MB. Files are grouped by categories such as code, image, text, document, compressed, video and sound files.
A page that checks the format and prefix rules of UK National Insurance numbers and provides sample NI numbers for testing forms. It explains how a NINO is built and states that NINOs have no check digit, so a correctly formatted number may never have been issued.
A page for checking Canadian social insurance numbers, verifying the first digit and Luhn check digit, showing the step-by-step check, and offering sample SINs for testing forms. It also lists what the first digit means and includes PHP and JavaScript check code.
A page from the Fake Name Generator that checks whether a US Social Security number follows Social Security Administration numbering rules. It explains how SSNs are built and how numbering changed in 2011, and provides sample SSNs for testing forms. The page notes that numbers following the rules may still never have been issued.
Provides fictional US identity number generators for testing forms and software applications.
A page for checking a vehicle identification number's characters and check digit, explaining the step-by-step check, reading the model year, and offering sample VINs for testing forms. It describes how a VIN is built, letter values, model year codes, and includes PHP check code.
Discord webhook message builder for creating embeds, formatting posts, and testing webhook output.
A collection of browser-based utilities for formatting, converting and generating data locally in the browser. It includes tools for JSON formatting, password generation, word counting, Base64 encoding, color conversion and regex testing, organized into packs such as JSON & Data and PDF Toolkit. The site states tools run locally without leaving the tab.
Cyfrin is a blockchain security firm helping protocols and institutions reduce risk through smart contract audits, formal verification, penetration testing, incident response, and security and risk advisory. It also provides security research and enterprise education and certifications.
DevToys is a cross-platform desktop application for developer tasks such as formatting JSON, comparing text and testing regular expressions. It is free and open source on Windows, macOS and Linux, with 30 default offline tools and extensibility.
Fake Email is a free disposable email service for anonymous use. It provides a temporary address without a password for sign-ups, phishing protection, and testing forms and newsletters. Every inbox is public, and the site states the service should never be used for passwords, banking or private conversations. Mail appears immediately, and users can change the address or add their own domain.
File-Examples is a service for developers, designers and testers to download sample files in many formats and sizes for test, demo or presentation use. It offers video, audio, document, image and other files such as text and archives, all free to download.
A browser-based tool that generates South African ID numbers, labeled as fake on the page. A form is submitted to obtain a generated number, and the page links to Wikipedia, an article and the source code for further information.
A search engine that accepts a few digits and generates a list of possible valid phone numbers, intended for OSINT needs. The page labels it an advanced valid phone number generator and provides United States state and rate center selections.
SpiderSuite is a web crawling and security testing platform for security professionals, penetration testers and researchers. It offers specialized crawlers, traffic interception, request crafting and fuzzing, along with source and graph views of crawl data, plus import and export in formats such as HAR, WARC, CSV and JSON.
ViewSync is a multiple YouTube viewer that plays several YouTube videos at once with synchronized audio, accurate to within a tenth of a second. Links are generated by stopping each video at an audio cue and testing the audio. It was originally designed for watching Mindcrack UHC episodes.
A free YouTube thumbnail downloader that retrieves any thumbnail in full HD from watch, Shorts and embed links, with no login required. The page also promotes Reflare, an AI tool for A/B testing thumbnails.
