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Data Converter & Validator

Convert JSON, YAML, XML, CSV, TOML and INI; generate schemas.

How to use this tool
  1. Select the developer operation and paste its expected input.
  2. Check the language, format or validation options.
  3. Run the operation and review diagnostics or exported code.

Limits and requirements

Generated code and validation results still need review in your own environment.

Check each operation’s notes. Some workflows run on your device; others use the OneTabTool server or a named third-party service. Don’t assume every tool processes files in the same way.

Available operations

  • JSON formatter & validator
  • JSON minifier
  • JSON → YAML
  • YAML → JSON
  • YAML formatter & validator
  • JSON → CSV
  • CSV → JSON
  • CSV formatter & table summary
  • JSON → XML
  • XML → JSON
  • XML formatter & validator
  • XML → CSV
  • CSV → XML
  • TOML → JSON
  • JSON → TOML
  • INI / .env → JSON
  • JSON Schema generator

    Infers from this sample only. Array items use the first item; review before validation.

  • JSON diff
  • JSONPath query tester

    Standard JSONPath syntax. Expression evaluation is disabled; filter expressions use the library safe evaluator.

  • JSON → SQL INSERT
  • Markdown → HTML
  • HTML → plain text
  • HTML → Markdown

    Converts headings, links, emphasis, images, lists and code. Review complex tables and custom elements.

  • JSON → Zod schema

    Inferred from the sample. Review required and optional fields.

  • YAML → XML
  • HTML conservative compactor

    Formats valid markup without removing meaningful text whitespace; not an optimizing minifier.

  • Markdown → Notion blocks

    Converts rich inline text, nested lists, tasks, quotes, code and tables into Notion block JSON.

  • HTML table → CSV
  • CSV chart — bar, line & pie

    Bar and line charts support negative values. Pie charts require non-negative values and a positive total. Up to 50 rows; exports SVG.

  • CSV → HTML table
  • Arabic, Persian & Western numerals
  • Arabic text utilities

    Choose a transformation explicitly; spelling normalization and bidi-control removal can change intended text. Statistics count Unicode letters.

  • Token counter & custom cost estimate

    Exact selected tokenizer. Model/provider tokenizers and message-format overhead can differ. Pricing is supplied by you; no current API pricing is assumed.

  • SQL INSERT values → JSON

    Parses single-row or multi-row INSERT VALUES statements. SQL expressions, dialect escapes and arbitrary queries are not executed or supported.

Questions about Data Converter & Validator

What does Data Converter & Validator do?

Convert JSON, YAML, XML, CSV, TOML and INI; generate schemas.

How do I use Data Converter & Validator?

Select the developer operation and paste its expected input. Check the language, format or validation options. Run the operation and review diagnostics or exported code.

What should I check before using the result?

Generated code and validation results still need review in your own environment.

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