Toolk Blog

Practical Guides for JSON, CSS, Markdown and Data Conversion

Learn format rules, compare conversion methods, and troubleshoot common errors with worked examples and links to the relevant browser tools.

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Roman Numeral Rules: Symbols, Subtraction and Examples

Learn modern Roman numeral rules, invalid forms, and worked conversions. Distinguish the standard converter range from historical numeral variations.

Learn CSV-to-JSON mapping, quoting, headers, type inference, and nested values. Check what survives when converting a JSON document back to CSV.