clearwater.com.au

What It Is

Clearwater is a site for “Projects, reference code, and embedded experiments.” Its pages are clearly described as non-commercial open-source code and technical references. It is closer to a developer knowledge base than a SaaS product. The main content includes validation references for Australian ABN, TFN, ACN, Medicare Number, and Medicare Provider Number, as well as embedded and experimental projects such as Gaugette, Ride Electric, and RC5 Decoding.

Core Features and Developer Perspective

Functionally, the most valuable part is its Validation Code Reference library, which provides validation rules and sample code for common Australian business, tax, company, and healthcare numbers. In the crawled content, the ACN page explains the nine-digit company number, display format, check-digit mechanism, and provides a PHP ValidateACN function that can be used directly as an implementation reference for form validation in business systems. In terms of language support, only PHP examples are explicitly shown in the content; no JavaScript, Python, Java, or other multi-language SDKs were found. For API/SDK support, there is also no hosted API, package manager integration, or official SDK description, so the main usage model is to read the algorithm and copy or adapt it into your own project.

Open Source, Self-Hosting, and Documentation

The pages state that the content is Non-commercial Open-source, and comments in the ACN example also indicate that the author makes no claim of rights and that the code can be used as needed. Strictly speaking, it is not a self-hostable application, but rather a set of reference pages and code snippets; developers can port the algorithms into their own services. The documentation is concise and straightforward, covering background, format, weights, validation logic, and reference links. Its limitations are the lack of version history, complete test cases, boundary-condition notes, and implementations in multiple languages.

Pricing, Pros and Cons, and Who It’s For

No pricing information is shown. Given the open-source and non-commercial description, it can be treated as a free reference resource. Its strengths are its focus, low barrier to use, and strong practicality for Australian number validation scenarios. Its drawbacks are the small ecosystem and the absence of an online validation service, commercial support, or SLA. It is suitable for developers who need to validate Australian numbers in registration, finance, CRM, or healthcare-related systems, as well as people learning about RC5 infrared decoding or small embedded projects.

Access from China

The crawled content does not provide information about network availability, mirrors, or payment, so its accessibility from China is unknown. If access is unstable, you can implement the logic yourself based on official rules, or look for third-party validation libraries in the relevant language ecosystem as alternatives.