UtilityKit

500+ fast, free tools. Most run in your browser only; Image & PDF tools upload files to the backend when you run them.

Free Data Conversion Tools — 34 Online Utilities

34 tools · Format Converters & Data Tools

Convert and transform structured data without spreadsheet software: JSON ↔ CSV ↔ XML ↔ YAML, flatten or unflatten nested objects, diff two payloads, and convert tables to SQL inserts. All conversions happen client-side so payloads stay private.

JSON Tools · 15

CSV ↔ JSONConvert between CSV and JSON formatsJSON ↔ YAMLConvert between JSON and YAML formatsJSON to CSVConvert JSON arrays to CSVHTML Table to JSONConvert HTML table markup into JSON dataXML to JSON ConverterConvert simple XML into structured JSON with optional attribute support and t…JSON to XML ConverterConvert JSON objects, arrays, and primitive values into XML with configurable…JSON TOML ConverterConvert JSON and TOML both ways using a practical subset parser.JSON INI ConverterConvert JSON objects to INI and parse INI back to JSON.JSON Properties ConverterConvert JSON and Java-style .properties with escaped dot notation.JSON RepairFix broken JSON: trailing commas, unquoted keys, single quotes, comments, sma…JSON Flatten / UnflattenToggle between nested JSON objects and dot-notation flat objects. Custom deli…JSON DiffCompare two JSON values structurally. See added, removed, and changed keys wi…JSON to SQL ConverterConvert a JSON array of objects into INSERT statements with type-inferred CRE…XLSX to JSON ConverterConvert Excel XLSX or XLS files to JSON array. Sheet picker, header-row detec…JSON to XLSX ConverterConvert a JSON array of objects to an Excel XLSX download. Sheet name input, …

CSV & Spreadsheets · 6

Markdown Table GeneratorCreate markdown tables with custom size/alignmentCSV TSV ConverterConvert CSV and TSV while preserving quoted fields and escaped quotes.XLSX to CSV ConverterConvert Excel XLSX or XLS files to CSV in your browser. Pick sheet, delimiter…CSV to XLSX ConverterConvert CSV files or pasted text to Excel XLSX in your browser. Auto-detect d…CSV to SQL ConverterConvert CSV data into INSERT statements for PostgreSQL, MySQL, or SQLite. Opt…Table Converter — Multi-FormatAuto-detect any tabular input (CSV, TSV, Markdown, HTML, JSON) and convert to…

YAML / XML / TOML · 2

XML FormatterBeautify and minify XML documentsYAML Validator & LinterValidate, format, and lint YAML in your browser. Get error messages with line…

SQL & Markup · 2

SQL FormatterFormat and prettify SQL queriesSQL MinifierMinify SQL by removing comments and redundant whitespace safely.

More tools · 9

GraphQL FormatterFormat and minify GraphQL queries, mutations, and SDL schemas in your browser…DOCX to TXT ConverterExtract plain text from .docx files in your browserDOCX to HTML ConverterConvert Word .docx files to clean HTML in your browserRTF to Text ConverterConvert Rich Text Format files to plain text in your browserODT / ODS to Text ConverterExtract plain text from OpenDocument files in your browserZIP ExtractorBrowse and extract files from a .zip archive in your browserZIP CreatorBundle multiple files into a .zip archive in your browserTAR.GZ ExtractorExtract files from .tar.gz, .tgz, and .tar archives in your browserRAR & 7Z ExtractorOpen .rar and .7z archives in your browser