Data
Structured-data work in one place: format, validate, and convert JSON, YAML, TOML, XML, and CSV, query with JSONPath or jq, minify or beautify code, and convert number bases, units, and map coordinates.
21 tools
Data
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JSON Formatter
Format, minify, validate, and inspect JSON with error positioning for API responses, config files, and debugging logs.
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JSON Diff
Compare two JSON documents with a git-style side-by-side or unified view, structural change list keyed by JSON Path, and word-level diff for long strings.
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JSONPath & jq Evaluator
Test JSONPath expressions and run jq filters on one page to extract nested fields, filter arrays, aggregate JSON, and see match counts as you type.
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JSON Converter
Convert JSON to YAML, XML, CSV, TOML, JavaScript object literals, and PHP arrays locally with format-specific conversion options.
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JSON to Types Generator
Generate TypeScript, Go, Rust, Swift, Kotlin, Python, and more type definitions from a JSON sample, with inferred fields, entirely in the browser.
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YAML Converter
Convert YAML to JSON, TOML, XML, JavaScript objects, or PHP arrays. Multi-document YAML merges into a JSON array, anchors and aliases expand by default, and common traps such as the Norway problem, version-as-float, and tab indentation surface as hints.
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SQL Formatter
Beautify, indent, and normalize SQL across MySQL, PostgreSQL, SQLite, BigQuery, Snowflake, and many other dialects.
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XML Formatter
Pretty print, indent, minify, and validate XML in the browser, with element folding, syntax highlighting, and line and column error reporting.
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XML Converter
Convert XML to JSON, YAML, TOML, JavaScript objects, or PHP arrays. Elements map to keys, repeated siblings become arrays, and attributes map to prefixed fields with optional value typing.
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TOML Converter
Convert TOML to JSON, YAML, XML, JavaScript objects, or PHP arrays. TOML tables become objects, arrays of tables become arrays, and date-times plus 64-bit integers stay clear.
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CSS Minifier
Minify CSS with a real parser that strips comments and whitespace, shortens values, and can merge rules, with live gzip size.
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CSS Beautifier
Reformat minified or one-line CSS into a readable stylesheet, with consistent indentation, one declaration per line, and a blank line between rules.
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JavaScript Minifier
Minify JavaScript with Terser to compress, mangle local names, and drop dead code, with live gzip size and a saved percentage.
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JavaScript Beautifier
Reformat minified or bundled JavaScript, TypeScript, or JSX into readable code, with proper indentation, line breaks, and your choice of semicolons and quote style.
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HTML Minifier
Shrink HTML and the CSS and JavaScript embedded in it, collapsing whitespace and comments while keeping the page rendering identical.
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HTML Beautifier
Reformat minified or one-line HTML into a readable, indented document, formatting the CSS and JavaScript embedded in it in the same pass.
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SVG Optimizer
Optimize and minify SVG with the svgo engine, stripping editor metadata and rounding coordinates, with a live preview and gzip size.
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CSV Tools
View, edit, parse, and export CSV in the browser with delimiter, quoting, escaping, table preview, and JSON conversion support.
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Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36 in the browser, with support for negatives, big integers, prefixes, and grouped output.
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Unit Converter
Convert between common units across 20+ physics and engineering categories including length, mass, duration, temperature, area, volume, speed, pressure, energy, power, information, frequency, and electrical quantities.
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Map Coordinate Converter
Convert a coordinate between WGS84, GCJ-02 (Amap/Tencent), BD-09 (Baidu), Web Mercator, CGCS2000, and global EPSG systems, with every target shown at once.
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About this category
Structured data is at the centre of every API, integration, and export. Most issues come down to formatting noise: a missing comma, a mismatched bracket, an unexpected encoding, a CSV that uses semicolons instead of commas.
These tools give you a fast, browser-side workspace: format and validate JSON, YAML, TOML, and XML, convert between them, pull values out of a large file with JSONPath or jq, spread a CSV into a table to check it row by row, minify or restore CSS, JavaScript, HTML, and SQL, and switch a number base, a unit, or a coordinate system on the way past. Paste a payload from a request, inspect a fixture from disk, or convert a spreadsheet for an import — without sending the data to a third-party server.
What you can do here
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Format, diff, and query JSON
Pretty-print or minify with positional error messages, compare two documents side by side, pull values out of a large file with JSONPath or jq, and generate type definitions for twenty-odd languages from a sample.
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Format conversion and CSV preview
Convert between JSON, YAML, TOML, XML, and CSV with nested keys and delimiter variants handled properly. CSV opens as a table with delimiter detection and header inference, so you can catch bad rows before an import.
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Minify and beautify code
Compress or restore CSS, JavaScript, HTML, SQL, and XML, and shrink SVG. Everything is re-laid-out from a real syntax tree, so behaviour is unchanged, with before, after, and gzip sizes shown.
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Number and coordinate maths
Convert between binary, octal, decimal, and hex, translate common units, and move coordinates between WGS84, GCJ-02, BD-09, and thousands of EPSG systems.