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Convertto

JSON, YAML, CSV & XML Converters

Convert, format and validate JSON, YAML, XML, CSV, TOML and Markdown.

Convertto converts between JSON, YAML, XML, CSV, TSV, TOML and Markdown, and generates TypeScript, Zod, Go, Python and SQL definitions from JSON. Formatting, minifying and validation run locally in your browser, so private API payloads and config files are never uploaded.

57 tools in this category

All data & format tools

HTML, CSS & JS MinifierStrip whitespace and comments to shrink HTML, CSS and JavaScript for production.
CSS, SCSS & Less FormatterFormat stylesheets with consistent indentation, spacing and property ordering.
CSV AnalyserProfile a CSV: column types, missing values, ranges, distinct counts and outliers.
CSV Column ExtractorPull selected columns out of a CSV by name or position, and reorder them.
CSV Duplicate RemoverRemove duplicate rows from a CSV, matching on every column or just a key you choose.
CSV Merger & JoinerJoin two CSV files on a shared key, or stack them, with inner, left and outer joins.
CSV SplitterSplit a CSV into chunks of N rows, or into separate files grouped by a column value.
CSV to Excel ConverterConvert CSV data into a real .xlsx workbook.
CSV Viewer & Table ConverterView CSV data as a sortable table and export it as JSON or a Markdown table.
cURL to Code ConverterTurn a cURL command into fetch, axios, Python requests or Node.js code.
CSV Data AnonymiserMask, hash or replace personal data in a CSV so it can be shared safely.
Data Format ConverterConvert between JSON, YAML, XML, CSV, TSV and TOML in any direction, locally in your browser.
.env to JSON ConverterConvert .env files to JSON and back — for config migrations and CI variables.
Excel to CSV ConverterExport Excel sheets to properly quoted CSV.
Excel to HTML ConverterConvert an Excel sheet into an HTML table.
Excel to JSON ConverterConvert spreadsheet rows into a JSON array of objects.
Excel to Markdown ConverterConvert an Excel sheet into a Markdown pipe table.
Excel to ODS ConverterConvert an Excel workbook into an OpenDocument Spreadsheet for LibreOffice Calc.
Excel to SQL ConverterGenerate CREATE TABLE and INSERT statements from a sheet.
Excel to Text ConverterExtract a spreadsheet as plain, readable text.
Excel to TSV ConverterExport an Excel sheet as tab-separated values.
Excel to XML ConverterExport spreadsheet rows as XML with safe element names.
Excel to YAML ConverterConvert spreadsheet rows into YAML.
HTML FormatterFormat and indent HTML properly, preserving inline elements and whitespace sensitivity.
INI & Config File ParserParse INI, .conf, .cfg and .properties files into structured JSON, YAML or TOML.
JavaScript & TypeScript FormatterFormat JavaScript, TypeScript, JSX and TSX properly with Prettier.
JSON DiffCompare two JSON documents and see exactly which keys were added, removed or changed.
JSON FlattenerFlatten deeply nested JSON into dot-notation keys, or expand flat keys back into nested objects.
JSON Formatter & ValidatorFormat, validate, repair and analyse JSON — with errors that point at the exact line.
JSON MergeDeep-merge several JSON documents, choosing how arrays and conflicts are resolved.
JSON Key SorterSort object keys and arrays in a JSON document to make two versions comparable.
JSON to C# Model ConverterConvert JSON objects into strongly-typed C# Model definitions and data models.
JSON to Dart Class ConverterConvert JSON objects into strongly-typed Dart Class definitions and data models.
JSON to Go Struct ConverterConvert JSON objects into strongly-typed Go Struct definitions and data models.
JSON to Java Class ConverterConvert JSON objects into strongly-typed Java Class definitions and data models.
JSON to Kotlin Data Class ConverterConvert JSON objects into strongly-typed Kotlin Data Class definitions and data models.
JSON to Mongoose Schema ConverterConvert JSON objects into strongly-typed Mongoose Schema definitions and data models.
JSON to Prisma Model ConverterConvert JSON objects into strongly-typed Prisma Model definitions and data models.
JSON to Python Dataclass ConverterConvert JSON objects into strongly-typed Python Dataclass definitions and data models.
JSON to Rust Struct ConverterConvert JSON objects into strongly-typed Rust Struct definitions and data models.
JSON to Swift Codable ConverterConvert JSON objects into strongly-typed Swift Codable definitions and data models.
JSON to TypeScript ConverterGenerate TypeScript interfaces, Zod schemas, Go structs, Python dataclasses or Rust structs from JSON.
JSON to Zod Schema ConverterConvert JSON objects into strongly-typed Zod Schema definitions and data models.
JSON ValidatorCheck whether JSON is valid, with the precise position of the error and what usually causes it.
JSONPath TesterRun JSONPath expressions against a document and see the matches instantly.
Markdown FormatterTidy Markdown — normalise headings, lists, tables and emphasis markers.
Markdown to HTML ConverterConvert Markdown to clean HTML, or turn existing HTML back into Markdown.
ODS to Excel ConverterConvert a LibreOffice Calc spreadsheet into a Microsoft Excel workbook.
Query String to JSON ConverterConvert URL query strings to JSON and build query strings from JSON objects.
SQL FormatterFormat and indent SQL queries for MySQL, PostgreSQL, SQLite, SQL Server and BigQuery.
CSV to Markdown TableTurn CSV, TSV or pasted spreadsheet data into a Markdown, HTML or reStructuredText table.
Word to CSV ConverterExtract the tables from a Word document into CSV.
Word to Excel ConverterExtract Word tables into an Excel workbook, one sheet per table.
XLSX to PDF ConverterConvert an Excel workbook into a PDF of real tables, one section per sheet.
XML FormatterFormat messy XML with proper indentation, or minify it back down, with well-formedness checked.
XML ValidatorCheck XML is well-formed, with the exact line and column of the first error and a document summary.
YAML Formatter & ValidatorFormat and validate YAML — catch the indentation mistakes that break CI pipelines.

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