Web development
How to convert images to WebP (and when not to)
What WebP is, how much it saves over JPEG and PNG, how to convert images in the browser, the terminal or Node.js, and how to serve them with picture.
The AIMRAN ecosystem blog
Technology explained with judgement.
Web development, artificial intelligence, developer tools and SEO. Guides that start from real problems, with tested code and sources in plain sight.
Featured articles
Developer tools
How to validate JSON and understand its most common errors
JSON syntax rules according to the standard, the five mistakes behind almost every parse failure, and how to validate a file in the browser, terminal or Node.js.
Web development
WCAG colour contrast: how it is calculated, which ratios it requires and how to meet them
What the contrast ratio is, how it is calculated from luminance, what levels AA and AAA require, how to measure it and the design mistakes that fail it.
Latest articles
Canonical and hreflang: how to implement them properly (and the mistakes that cancel them)
Docker: the difference between an image and a container, explained with commands
How to undo the last commit in Git without losing work
How a language model works: tokens, context window and temperature
How to count the tokens in a prompt and estimate what a call to a language model costs
How to read and write a cron expression (with examples you can copy)
HTTP security headers: which ones to set on any website and what each does
Lazy loading images in HTML: loading="lazy", fetchpriority and decoding
Browse by category
Five broad topics, designed to grow with real content.
- Web development Practical web development guides: HTML, CSS, JavaScript, WordPress, APIs, Git, Docker and Linux, with tested examples and clear explanations. 6 articles
- Artificial intelligence Artificial intelligence without the hype: how language models work, AI tools for developers, automation and agents. 3 articles
- Developer tools Online and desktop tools for developers: productivity, debugging, JSON, images, PDF and text. What they do, when to use them and their limits. 3 articles
- SEO Technical SEO explained for developers: crawling and indexing, canonical and hreflang, web performance, Core Web Vitals, Search Console and WordPress SEO. 3 articles
- Technology Software, applications, hosting, domains and security explained clearly: how the pieces that support any internet project work. 3 articles
Who writes here
Aimran Oukham
Full-stack developer based between Valencia and Alicante, creator and maintainer of the AIMRAN ecosystem: aimran.es, AIMRAN Tools, AIMRAN Library and AIMRAN Universe. This blog is where he documents what he learns building and maintaining those projects: technical decisions, common mistakes and solutions that work.
View author profileMore AIMRAN
One ecosystem, several pieces.
- AIMRAN Tools Free online tools, no sign-up.
- AIMRAN Library Components and resources for web projects.
- AIMRAN Universe The map of every project.
- aimran.es Aimran’s main website.