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Data & File Format Converters
Convert between JSON, CSV, XML, YAML, TOML, SQL, Excel and other data formats. 129 free tools that run in your browser, no sign-up needed.
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JSON to Excel ConverterTurn JSON into a styled .xlsx spreadsheet; nested arrays become their own linked sheets.JSON to CSVConvert JSON data to CSV for spreadsheets.CSV to JSONConvert CSV data to JSON with live preview.Excel to CSVConvert XLSX spreadsheets to CSV.CSV ViewerOpen a CSV or TSV file as a sortable, filterable table.Excel Viewer (XLSX / XLS)Open XLSX, XLS and ODS spreadsheets in your browser without Excel.Line Ending ConverterConvert text and files between CRLF, LF and CR line endings.Markdown to HTMLConvert Markdown to clean HTML with a live editor.XML to JSONConvert XML to JSON with validation.Text Encoding ConverterDetect and convert text file encodings like UTF-8, UTF-16 and Latin-1.JSON ViewerExplore JSON as a collapsible tree, search keys and values and copy any node's path.TTF to WOFF2 ConverterConvert TTF and OTF fonts to WOFF2 or WOFF and get a ready @font-face CSS snippet.Chmod CalculatorConvert Linux file permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x) notation.JSON to TypeScriptGenerate TypeScript interfaces or types from JSON, with nested types and optional fields.Morse Code TranslatorTranslate text to Morse code and back, then play it as sound or a blinking light, or save a WAV.HTML Table GeneratorBuild HTML tables in an editable grid with styles, header rows, CSV import and live preview.Hex to Text ConverterConvert hex to text and text to hex with UTF-8 support and space, 0x, \x or comma formats.JSON to XML ConverterConvert JSON to well-formed XML with attributes, arrays and pretty print.JSON to YAML ConverterConvert JSON to clean YAML as you type, with indent, quoting and sort options.YAML to JSON ConverterConvert YAML to pretty or minified JSON, with errors pinned to the exact line.HTML to Markdown ConverterTurn HTML or pasted rich text into clean Markdown with tables and live preview.Markdown Table GeneratorBuild Markdown tables in a grid or paste from Excel/CSV, with alignment and preview.JSON ValidatorCheck JSON with the exact line and column of each error, fix tips and one-click auto-fix.Image to Base64Convert images to Base64 data URIs, CSS backgrounds and HTML img tags in your browser.Base64 to ImagePaste a Base64 string or data URI to preview, identify and download the image.JSON CompareCompare two JSON documents and see every added, removed and changed path.Hex to DecimalConvert hex to decimal instantly with steps and signed mode.Decimal to HexConvert decimal to hex instantly with steps and signed mode.Binary to DecimalConvert binary to decimal instantly with steps and signed mode.Decimal to BinaryConvert decimal to binary instantly with steps and signed mode.Two's Complement CalculatorDecimal to two's complement binary and back for 4-64 bits, with invert-and-add-1 steps.XML to CSV ConverterConvert XML to CSV: detects repeating records, flattens nested data, pick your columns.CSV to XML ConverterConvert CSV to well-formed XML with custom root and row names, escaping and pretty print.TOML to JSON ConverterConvert TOML to JSON and JSON to TOML with a full v1.0 parser and clear error lines.JSON to Go StructTurn JSON into Go structs with inferred types, nested structs and json tags.JSON to Python ClassGenerate Python dataclasses, Pydantic models or TypedDicts with type hints from JSON.JSON to C# ClassConvert JSON to C# classes or records with System.Text.Json or Newtonsoft attributes.JSON SorterSort JSON keys A-Z recursively, sort arrays by value or by a key, then pretty-print or minify.JSON to HTML TableConvert a JSON array of objects into clean HTML table code with CSS styles and a live preview.CSV to SQL ConverterConvert CSV to SQL CREATE TABLE and INSERT statements for MySQL, PostgreSQL, SQLite or SQL Server.IPv4 to IPv6 ConverterConvert IPv4 to IPv4-mapped, 6to4 and NAT64 IPv6, extract IPv4 from IPv6, and get int/hex/binary.cURL to Code ConverterConvert curl commands to JavaScript fetch, Axios, Python requests, Node.js, PHP and Go code.Code to ImageTurn code into a beautiful syntax-highlighted PNG with themes, window frame and background.Excel to JSON ConverterConvert Excel sheets (XLSX, XLS, ODS) to JSON with header row, type and shape options.CSV to Excel ConverterConvert CSV files to a real .xlsx workbook with typed numbers and dates, one sheet per file.CSV SplitterSplit a large CSV into smaller files by row count, file count or column value, header kept.CSV MergerCombine many CSV files into one, matching columns by name, with dedupe and a source column.VCF to CSV ConverterConvert vCard (.vcf) contacts to CSV for Google or Outlook, or turn a CSV back into a VCF.Calendar Event (.ics) GeneratorCreate an .ics calendar invite with time zone, reminders and repeats + Google/Outlook links.CSV Column ExtractorPick, reorder and rename CSV columns, filter rows by value, and export a new CSV or JSON.CSV Diff CheckerCompare two CSV files by key column and see added, removed and changed rows cell by cell.CSV Duplicate Row RemoverRemove duplicate rows from a CSV by all or selected columns and download the cleaned file.CSV to HTML TableTurn CSV into clean HTML table code with a live preview, styling options and one-click copy.CSV to Markdown TableConvert CSV to a neatly aligned GitHub Markdown table with column alignment and live preview.CSV TransposeSwap rows and columns of CSV, TSV or pasted spreadsheet data, with delimiter auto-detect.Date Format ConverterConvert any date to ISO 8601, RFC 2822, Unix time and custom strftime, moment or Java patterns.ENV to JSON ConverterConvert .env files to JSON or YAML and JSON back to .env, with quotes and multiline values.File to Base64Convert any file to a Base64 string or data URI with MIME detection, line wrap and download.HTML Table to CSVExtract any table from HTML or page source to CSV, TSV or JSON, with colspan and rowspan handled.IEEE 754 Floating Point ConverterConvert decimals to 32/64-bit IEEE 754 floats: toggle bits, see hex, exact value and rounding error.INI to JSON ConverterConvert INI and CFG files to JSON and JSON back to INI, with sections, arrays and types.IP Address ConverterConvert IPv4 to decimal, hex, binary, octal and back, with class and private/public check.ISBN Converter & ValidatorConvert ISBN-10 to ISBN-13 and back, validate check digits and hyphenate, one or in bulk.JSON Flatten / UnflattenFlatten nested JSON to dot or bracket path keys, or unflatten flat keys back to nested JSON.JSON to Dart ClassTurn JSON into Dart model classes with fromJson, toJson, null safety and nested classes.JSON to Java ClassTurn JSON into Java POJOs or records with Lombok, getters/setters and Jackson or Gson annotations.JSON to Kotlin Data ClassTurn JSON into Kotlin data classes for kotlinx.serialization, Gson, Moshi or Jackson.JSON to Markdown TableTurn a JSON array of objects into a GitHub Markdown table with column picker and alignment.JSON to PHP ArrayConvert JSON to PHP array code (short [] or array()) and PHP arrays back to JSON.JSON to Rust StructTurn JSON into Rust structs with serde derives, rename attributes, Option and Vec types.JSON to SQL ConverterConvert a JSON array of objects to CREATE TABLE and INSERT statements for MySQL, Postgres, SQLite.JSON to Swift StructTurn JSON into Swift Codable structs with CodingKeys, optionals and nested types.JSON to TOML ConverterConvert JSON to clean TOML with tables, arrays of tables, inline tables and dates.JSONL to JSON ConverterConvert JSON Lines / NDJSON to a JSON array and back, with line-level error reports.Properties to YAML ConverterConvert Java .properties to nested YAML (application.yml) and YAML back to properties.PX to EM ConverterConvert pixels to em using the parent font size, and em back to px, with conversion tables.Query String to JSONConvert URL query strings to JSON with nested brackets and arrays, and JSON back to a query string.REM to PX ConverterConvert CSS rem values to pixels for any root font size, with a quick 0.25–6rem table.SQL to JSON ConverterConvert SQL INSERT statements and dumps into a JSON array of row objects, with CSV export.TSV to CSV ConverterConvert TSV to CSV and back, or between tab, comma, semicolon and pipe, with correct quoting.TypeScript to JavaScriptConvert TypeScript or TSX to clean JavaScript instantly: strip types, keep or compile JSX.XML to YAML ConverterConvert XML to clean YAML with attributes, text nodes, lists and exact error lines.YAML to XML ConverterConvert YAML to pretty, well-formed XML with custom root, attributes and array item tags.Boolean Algebra SimplifierSimplify boolean expressions or minterm lists to minimal SOP and POS with Quine-McCluskey steps.Compare Excel FilesCompare two Excel spreadsheets cell by cell, highlight changes and export a diff report.CSV CleanerClean messy CSV in one click: trim spaces, drop empty rows and columns, fix headers, dedupe.CSV VLOOKUP ToolJoin two CSV or Excel files on a key column like VLOOKUP, with left, inner and full joins.Remove Duplicates in ExcelFind and remove or highlight duplicate rows in XLSX or CSV files by the columns you choose.GeoJSON ViewerView GeoJSON on a map, inspect and edit properties, validate against RFC 7946 and export.GPX ViewerOpen GPX tracks on a map with distance, elevation profile, moving time, speed and splits.JSON Repair ToolFix broken JSON automatically: trailing commas, quotes, comments, truncated data, with a diff.Karnaugh Map SolverSolve 2–6 variable K-maps: click cells or enter minterms to get the minimal SOP or POS with groups.Merge Excel FilesCombine XLSX, XLS and CSV files into one workbook or append all rows into a single sheet.Parquet File ViewerOpen Apache Parquet files in your browser: schema, rows, filters and CSV or JSON export.Query CSV with SQLRun SQL on CSV, Excel, JSON and Parquet files in your browser with DuckDB. Join and export.Online Serial MonitorTalk to Arduino, ESP32 and USB serial devices in your browser: log, send, plot and save.Split Excel FileSplit an Excel sheet into several files by row count or by each value in a column, as ZIP.SQL Create Table GeneratorDefine columns, keys, defaults and indexes; get CREATE TABLE SQL for MySQL, Postgres and more.SQL IN Clause GeneratorTurn a pasted list into a SQL IN ('a','b') clause with quoting, dedupe and 1,000-item chunks.SQL Online CompilerRun SQL queries online on SQLite with sample databases, a result grid, CSV export and .db save.SQL to ER DiagramPaste CREATE TABLE statements and get an entity-relationship diagram with keys and links.XML to XSD GeneratorGenerate an XML Schema (XSD) from sample XML: types, occurrences, attributes and namespaces.XML ValidatorCheck if XML is well-formed, see the exact line and column of each error and pretty-print it.Wildcard Mask CalculatorConvert a subnet mask or CIDR to a wildcard mask for ACLs and OSPF, with range and binary.CSV to VCF ConverterConvert a contacts CSV into a vCard (.vcf) file, mapping columns to name, phone, email and more.CSV to YAML ConverterConvert CSV rows to a YAML list of mappings with type inference and delimiter detection.Endianness ConverterSwap byte order of 16, 32 and 64-bit hex values and see big- and little-endian integers and floats.Excel to SQL ConverterTurn an Excel sheet into CREATE TABLE and INSERT statements for MySQL, PostgreSQL, SQLite or SQL Server.Excel to VCF ConverterTurn an Excel contact list into a vCard .vcf file for iPhone, Android, Google or Outlook.File to C ArrayConvert any file into a C or C++ byte array header, like xxd -i, with const and PROGMEM options.Image to C ArrayConvert images to monochrome, RGB565 or RGB888 C arrays for OLED, LCD and TFT displays.JSON Merge ToolDeep-merge two or more JSON objects with array concat, replace or union and a conflict rule.JSONL to CSV ConverterConvert JSON Lines / NDJSON to CSV with flattened columns; streams large files locally.PHP Unserialize OnlineDecode PHP serialize() strings to JSON, a tree or print_r, and serialize JSON back to PHP.SQL Dialect ConverterTranslate SQL between MySQL, PostgreSQL, SQLite, SQL Server, Oracle, BigQuery and more.TSV to JSON ConverterTurn tab-separated data pasted from Excel or Sheets into a JSON array or keyed object.XLS to XLSX ConverterConvert old Excel 97-2003 .xls workbooks to modern .xlsx files in your browser, several at once.XML to Excel ConverterTurn repeating XML elements into an .xlsx spreadsheet with attributes and nested data as columns.XSD to XML Sample GeneratorGenerate a sample XML document from an XSD schema, with types, attributes and namespaces.YAML to CSV ConverterTurn a YAML list of objects into CSV with dot-notation columns, custom column order and download.DOCX to Markdown ConverterConvert Word .docx to clean Markdown with headings, lists, tables, links and images in a ZIP.ES6 to ES5 ConverterTranspile modern JavaScript (ES2015+) to ES5 with Babel: targets, module format and loose mode.JavaScript Object to JSONTurn JS object literals and Python dicts into valid JSON: quotes keys, fixes commas and values.JSON Graph VisualizerSee JSON as an interactive node graph with zoom, collapse and search; export PNG or SVG.KML ViewerOpen KML and KMZ files on an interactive map: placemarks, paths, polygons, folders, export.MySQL to PostgreSQL ConverterConvert MySQL dumps and CREATE TABLE statements to PostgreSQL: types, AUTO_INCREMENT, ENUMs, quotes.Text to CSV ConverterTurn space-aligned, fixed-width, pipe or tab separated text into clean CSV with a live preview.VCF File ViewerOpen vCard .vcf files as contact cards with photos, search and duplicate check, export CSV.XML ViewerBrowse XML as a collapsible tree with search, XPath of any node, attributes and big-file support.
About Data & File Format Converters
Convert data between JSON, CSV, XML, YAML, TOML, SQL and Excel, or open spreadsheets and data files in a viewer. Handy for moving data between an API, a spreadsheet and a database without writing a script.
Most used here: JSON to Excel Converter, JSON to CSV and CSV to JSON.