Converters tools

Convert JSON arrays to CSV for spreadsheets. Paste JSON, pick a delimiter, and download the CSV instantly.

• Convert JSON arrays to CSV
• Custom delimiter and quote handling
• Flatten nested objects to columns
• +2 more

Paste CSV and get JSON. Handles headers, delimiters, and spreadsheet exports — all locally.

• Convert CSV to structured JSON
• Automatic delimiter detection
• Header row and type inference options
• +1 more

Convert JSON to XML with root element control. Use for JSON input only; for reverse use xml-to-json, for JSON to YAML use json-to-yaml. Input: JSON ≤10MB. Returns XML or line-numbered JSON error. 100% client-side.

• Convert JSON to well-formed XML
• Custom root element and attribute handling
• Pretty-printed or compact output
• +1 more

Convert XML to JSON preserving attributes and nesting. Use for XML input only; for reverse use json-to-xml. Input: XML ≤10MB. Returns JSON or XML parse error. 100% client-side.

• Convert XML to structured JSON
• Preserve attributes and child elements
• Pretty-printed output for readability
• +1 more

Convert Markdown to HTML with live preview. Use for publishing Markdown; for editing with preview use markdown-editor, for reverse direction use html-to-markdown. Input: Markdown ≤10MB. Returns HTML. 100% client-side.

• Convert Markdown to clean HTML
• GitHub-flavored Markdown support
• Live preview of the rendered result
• +1 more

Convert HTML to Markdown for CMS exports and docs. Use for HTML input only; for Markdown to HTML use markdown-to-html. Input: HTML ≤10MB. Returns Markdown. 100% client-side.

• Convert HTML to clean Markdown
• Preserves headings, lists, links, and images
• Configurable conversion options
• +2 more

Convert JSON to YAML for configs. Use for JSON input; for YAML validation use yaml-formatter, for TOML cross-format use toml-converter. Input: JSON ≤10MB. Returns YAML or JSON error. 100% client-side.

• Convert JSON to YAML and back
• Preserves nested structures and types
• Real-time conversion as you type
• +1 more

Convert between TOML, JSON, and YAML in any direction. Use for multi-format configs; for single-pair JSON-YAML use json-to-yaml. Input: TOML/JSON/YAML ≤10MB. Returns converted text or parse error. 100% client-side.

• Convert between TOML, JSON, and YAML
• Preserves tables, arrays, and primitives
• Real-time conversion with validation
• +1 more

Convert Unix timestamps to readable dates and back. Supports timezones and multiple formats.

• Convert Unix timestamps to human-readable dates
• Convert dates back to Unix time
• Multiple timezone and format options
• +1 more

Convert between HEX, RGB, HSL, HSV, and CMYK. Pick a color and copy any format.

• Convert between HEX, RGB, HSL, HSV, and CMYK
• Live preview of the selected color
• Generate complementary palettes
• +1 more

Converts length, weight, volume, area and speed between metric and imperial units. Use for everyday measurements; differs from currency-converter by physical units vs live money rates. Returns value with formula. 100% client-side.

• Convert across 13 unit categories
• Accurate formulas backed by real constants
• Batch conversion table for all units in a category
• +2 more

Convert text between camelCase, PascalCase, snake_case, kebab-case and UPPER. Use for code naming; for URL slugs use slug-generator. Input: text ≤10MB. Returns converted cases. 100% client-side.

• Convert to camelCase, PascalCase, snake_case, and more
• Real-time conversion as you type
• Multiple case options at once
• +1 more

Converts numbers between binary, octal, decimal and hex bases. Use when debugging encodings or flags; differs from roman-numeral-converter by positional bases vs Roman symbols. Returns all-base equivalents. 100% client-side.

• Convert between binary, octal, decimal, and hexadecimal
• Support for arbitrary bases up to 36
• Precision handling for large numbers
• +1 more

Spells numbers as English words with currency and ordinal options. Use for cheques, invoices or legal text; differs from text-to-unicode by words vs code points. Returns word form and copy-ready text. 100% client-side.

• Convert numbers to written words
• Handles large numbers and decimals
• Copy the word form of the number

Generate TypeScript interfaces from JSON with optional readonly and export. Use for TS types; for Go use json-to-go, for generic code use json-to-code. Input: JSON ≤10MB. Returns .ts interfaces or JSON error. 100% client-side.

• Generate TypeScript interfaces and types
• Correctly types nested objects and arrays
• Optional, readonly, and export options
• +1 more

Generate Go structs with json tags from JSON. Use for Go only; for TypeScript use json-to-typescript. Input: JSON ≤10MB. Returns Go code or JSON error. 100% client-side.

• Generate Go structs from JSON
• Correct types and json struct tags
• Nested struct generation
• +1 more

Edit Markdown with side-by-side live HTML preview and export. Use as default authoring tool; for conversion-only without editing use markdown-to-html. Input: Markdown ≤10MB. Returns edited Markdown + HTML preview. 100% client-side.

• Write Markdown with live rendering
• GitHub-flavored Markdown support
• Export the rendered HTML
• +1 more

Converts between Arabic numbers and Roman numerals with validation. Use for chapters, clocks or outlines; differs from base-converter by Roman symbols vs positional bases. Returns numeral or number. 100% client-side.

• Convert integers to Roman numerals and back
• Real-time conversion with validation
• Copy the converted result
• +2 more

Spells text as NATO phonetic words (Alpha, Bravo, Charlie). Use when dictating over calls; differs from text-to-unicode by spoken words vs code points. Returns phonetic transcription. 100% client-side.

• Convert text to the NATO phonetic alphabet
• Per-letter breakdown table
• Copy the phonetic spelling
• +2 more

Shows Unicode code points, names and UTF-8 bytes for any text. Use when debugging encoding issues; differs from nato-alphabet by code points vs phonetic words. Returns per-character table with escapes. 100% client-side.

• Encode text as Unicode code points
• Multiple escape formats: hex, decimal, \u escapes
• Decode Unicode escapes back to text
• +1 more

Reformats delimited lists between commas, lines, JSON, SQL and bullets. Use when cleaning pasted lists; differs from case-converter by delimiters and structure vs letter casing. Returns list with dedupe options. 100% client-side.

• Convert between CSV, JSON, and one-per-line lists
• Custom delimiter control
• Real-time conversion as you paste
• +1 more

Converts Celsius, Fahrenheit, Kelvin and Rankine instantly. Use for weather, cooking or science; differs from unit-converter by temperature scales vs length/weight. Returns all-scale equivalents. 100% client-side.

• Convert between Celsius, Fahrenheit, and Kelvin
• Real-time conversion while you type
• Quick presets for common temperatures

Extract HTML tables to JSON arrays for scraping. Use for <table> input only; for CSV to JSON use csv-to-json. Input: HTML with tables ≤10MB. Returns JSON array or NO_TABLE_FOUND error. 100% client-side.

Generate code types from JSON. Use for boilerplate; for TS only use json-to-typescript, for Go use json-to-go. Input: JSON ≤10MB. Returns code. 100% client-side, files never leave browser.