Building and sharing useful things.
sangsen brings together online tools, apps and articles for getting everyday tasks done and learning something new.
Tools
All tools →- JSON FormatterValidate and pretty-print JSON with clear, positioned error messages.jsonformattervalidator
- JSON ValidatorCheck whether JSON is valid and see its top-level type, with a plain explanation of the problem if not.jsonvalidatorparser
- JSON MinifierCompact valid JSON by removing unnecessary whitespace.jsonminifiercompact
- JSON Escape / UnescapeEscape text into a JSON string literal, or unescape a JSON string literal back to plain text.jsonescapeunescapestring
Apps
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Recent articles
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AIGenerative AI Explained: How It Creates Content — and Why It Sometimes Gets Things Wrong
Generative AI covers far more than chatbots — image, audio, and video generators work on a similar underlying principle. Here's how they work, and why AI output still needs a human check.
AIPrompt Engineering Basics: How to Get Better Answers from AI Chatbots
Since an LLM continues whatever pattern you give it, how you ask shapes what you get back. Practical, concrete ways to write better prompts.
AIWhat Are Large Language Models, and How Do They Actually Work?
LLMs like the ones behind ChatGPT feel like they understand language, but underneath they're doing one repeated task: predicting the next word. Here's how that produces coherent answers.