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Easy declarative client & server data validation

A (much) better way to validate forms in OutSystems

Dynamic CRUD Validator automates data validation in CRUD operations by dynamically generating validation rules based on your database structure. Leveraging Entity and Entity_Attr, it applies checks for required fields and text length, ensuring data integrity without manual coding. Ideal for large tables in legacy systems or high-stakes applications, it adapts to changes automatically, saving time and boosting accuracy. Perfect for developers looking to streamline data validation, with opportunities for community contributions to enhance its functionality.

Ensure the correctness of your data by enforcing preconditions, enhancing code readability and reliability

ALTCHA is a free, open-source CAPTCHA alternative that protects your website from spam and abuse.

ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content. Unlike other CAPTCHA solutions, ALTCHA is free, open-source and self-hosted, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR.

📦 StringHelpers — Single-File C# Utility Library
StringHelpers is a single-file, dependency-free C# utility library that provides a comprehensive set of string manipulation and analysis functions. It’s designed for easy integration into any C# 7.3+ project by simply adding StringHelpers.cs.

Why Use It?
This asset is ideal for developers who need a lightweight, all-in-one string utility toolkit without external dependencies. It’s published as a release asset for easy reuse across projects.

A lightweight client-side PDF metadata extractor using PDF.js. Extracts metadata including title, author, subject, creator, producer, keywords, PDF version, creation date, modification date, and page count. No server calls, no storage - everything happens in the browser.

The Excel Structure Validator is an OutSystems reusable component designed to validate the structure of Excel files against a predefined template.
It allows developers to ensure that uploaded files match the required headers, sheet names, and overall format before processing.

This component is especially useful for applications where data integrity is crucial, and the incoming Excel files must strictly follow a given structure.

Widgets to display success/error validation messages.

Official french address validation services, more info at https://adresse.data.gouv.fr/api-doc/adresse.

Abstract Connector offers instant Abstract's APIs connectivity, providing you an easy way to interface with the Abstract's API. With this API connectivity to the Abstract's REST API, users can validate Email, Phone number, VAT and IBAN through Abstract.