# YJTOON review, pricing and alternatives

Source: https://listme.name/software/yjtoon
Website: https://www.yjtoon.com/

CC0 reference datasets served as JSON, YAML and TOON

YJTOON publishes 185 public-domain reference datasets, such as HTTP status codes, Git commands and SQL joins, as readable tables and as JSON, YAML or TOON from one URL. The datasets are CC0 and need no signup or API key. The site is by Yunus Emre Vurgun.

The datasets sit in 27 categories, from programming languages and operating systems to physics, history and law. A dataset URL returns the same content as JSON, YAML or TOON, a compact format that the site describes as using fewer tokens than JSON. A search covers all 185 datasets and opens with the slash key.

The site reports that TOON uses 32% fewer tokens than the JSON it serves, and 60% fewer on the best dataset. These are the site's own figures, and they were not checked independently for this entry. Each dataset page also offers a copy-ready curl command, so the data can be fetched from a terminal or a script.

- Free | Web
- Price: Free, with no signup or API key; datasets are CC0
- Checked: 2026-10-10

## Strengths

- Datasets are CC0, so reuse needs no attribution
- Same data in JSON, YAML and TOON from one URL
- Search covers all 185 datasets with the slash key
- No signup or API key is needed to fetch data

## Limits

- Token savings (32% and 60%) are figures the site reports for itself
- Datasets are fixed reference tables, not live data feeds
- TOON needs its own parser, unlike JSON and YAML

## Rankings

- #5 of 9 in [best Open data portals and dataset libraries](https://listme.name/best/open-data-portals), score 79.5: 185 CC0 reference datasets served as JSON, YAML or TOON from one URL, with no signup or API key. The collection is small and covers reference tables rather than statistics or live feeds.
- #12 of 12 in [best AI agent frameworks and tooling](https://listme.name/best/ai-agent-tooling), score 60.5: CC0 datasets that agent code can fetch from one URL as JSON, YAML or TOON, with no API key. It is a data source, not a framework, and the 32% token saving is the site's own figure, so it ranks below itsfully.online's tools.
- #9 of 9 in [best Computer science and hardware learning resources](https://listme.name/best/computer-science-learning-resources), score 61.5: Reference tables on data structures, design patterns, SOLID principles and HTTP codes, under CC0 with no signup. They give descriptions and complexity figures but no lessons or exercises, so they work beside a course, not as one.

## Alternatives

- [LangChain](https://listme.name/software/langchain), score 92.0
- [CS50](https://listme.name/software/cs50), score 91.5
- [LangGraph](https://listme.name/software/langgraph), score 90.5
- [Our World in Data](https://listme.name/software/our-world-in-data), score 90.5
- [Nand2Tetris](https://listme.name/software/nand2tetris), score 90.0
- [World Bank Open Data](https://listme.name/software/world-bank-open-data), score 89.0
- [LlamaIndex](https://listme.name/software/llamaindex), score 88.0
- [Eurostat](https://listme.name/software/eurostat), score 87.5

\* Made by, or connected to, the publisher of listme.name. Listed on the same criteria, with the lift described at https://listme.name/methodology and https://listme.name/disclosure.