All JSON Tools

Every free converter on JSONSwitcher in one place — 52 tools grouped by what you are working with. All of them run in your browser: your data is processed locally with JavaScript and is never uploaded to a server.

JSON Spreadsheet & Document Converters

Convert JSON to and from CSV, Excel, PDF, HTML and Markdown. Every converter runs in your browser — your data is never uploaded.

JSON to CSV
Flatten JSON arrays into a clean CSV file for Excel or Sheets.
CSV to JSON
Parse CSV into a JSON array — delimiter detected, types inferred.
JSON to Excel
Export JSON to a formatted .xlsx workbook — no Excel needed.
Excel to JSON
Read any .xlsx or .xls sheet into a JSON array.
JSON to PDF
Render JSON as a styled, printable PDF table.
PDF to JSON
Extract tables and text from PDF files into JSON.
JSON to HTML
Render JSON as an HTML table, list or definition list.
HTML to JSON
Extract HTML tables and DOM structure as JSON.
JSON to Markdown
Generate GFM tables, nested lists or README docs from JSON.
Markdown to JSON
Parse Markdown tables and front matter into JSON.

JSON Data Format Converters

Convert JSON to XML, YAML, TOML, INI and .env — and back. Correct types, nesting and escaping for config files and data exchange, processed locally.

JSON to XML
Convert JSON into well-formed XML with a custom root element.
XML to JSON
Parse XML into JSON — attributes, namespaces and CDATA handled.
JSON to YAML
Convert JSON to YAML for config files and Kubernetes manifests.
YAML to JSON
Parse YAML — anchors, merge keys and multi-docs — into JSON.
TOML to JSON
Parse Cargo.toml, pyproject.toml or any TOML file to JSON.
JSON to TOML
Convert JSON objects into valid TOML tables.
JSON to INI
Turn JSON objects into INI [sections] and key=value pairs.
INI to JSON
Parse INI and php.ini files to JSON with type inference.
JSON to .env
Flatten JSON into KEY=VALUE dotenv variables.
.env to JSON
Parse .env files — quotes, export and multi-line values — to JSON.

JSON to Code Generators

Generate typed models from a JSON sample: TypeScript interfaces, Java POJOs, C# classes, Python dataclasses, Go structs, Kotlin, Swift, Dart and PHP.

JSON to TypeScript
Generate TypeScript interfaces (JSON to TS) from a JSON sample.
JSON to Java
Generate a Java POJO, Lombok class or record from JSON.
JSON to C#
Generate C# classes or records with System.Text.Json attributes.
JSON to Python
Generate Python dataclasses, Pydantic models or TypedDicts.
JSON to Go
Generate Go structs with json tags and idiomatic field names.
JSON to Kotlin
Generate Kotlin data classes for kotlinx, Moshi or Gson.
JSON to Swift
Generate Swift Codable structs with CodingKeys.
JSON to Dart
Generate Flutter models with fromJson, toJson and copyWith.
JSON to PHP
Generate PHP arrays, stdClass or typed PHP 8 classes.

Code to JSON: Mock Data & Serialization

Paste a class, struct or interface and get realistic mock JSON, plus ready-to-run serialization snippets for TypeScript, Java, C#, Python, Go, Kotlin, Swift, Dart and PHP.

TypeScript to JSON
Mock JSON, JSON Schema and snippets from TypeScript interfaces.
Java to JSON
Mock JSON from Java classes plus Jackson and Gson snippets.
C# to JSON
Mock JSON from C# classes and JsonSerializer snippets.
Python to JSON
Mock JSON from Python classes plus json.dumps snippets.
Go to JSON
Mock JSON from Go structs and json.Marshal snippets.
Kotlin to JSON
Mock JSON from Kotlin data classes plus serializer snippets.
Swift to JSON
Mock JSON from Swift Codable types plus JSONEncoder snippets.
Dart to JSON
Generate toJson() and jsonEncode code from a Dart class.
PHP to JSON
Mock JSON from PHP classes plus json_encode snippets.

JSON Schema, GraphQL & Database Tools

Generate JSON Schema from JSON and mock JSON from a schema, convert between JSON and GraphQL, and turn JSON into SQL (or SQL and MySQL output into JSON).

JSON to JSON Schema
Generate a JSON Schema (Draft-07 or 2020-12) from JSON.
JSON Schema to JSON
Generate realistic sample JSON from a JSON Schema.
JSON to GraphQL
Generate a GraphQL schema, inputs and queries from JSON.
GraphQL to JSON
Mock JSON, response data and JSON Schema from GraphQL SDL.
JSON to SQL
Generate CREATE TABLE and INSERT statements for 4 dialects.
SQL to JSON
Turn SQL INSERTs and query results into JSON.
MySQL to JSON
Convert mysqldump INSERTs or mysql CLI output into JSON.

JSON Tools & Utilities

View, validate, minify and beautify JSON, unescape JSON strings, encode and decode Base64 (including JWT payloads), and flatten, sort, merge or diff JSON documents.

JSON Viewer
View, validate and explore JSON in a collapsible tree.
JSON Minifier
Minify or beautify JSON and validate it in one click.
JSON Utilities
Flatten, unflatten, sort, merge and diff JSON documents.
JSON String to JSON
Unescape stringified or double-encoded JSON into an object.
JSON to String
Stringify and escape JSON for code, env vars or APIs.
JSON to Base64
Encode JSON as standard or URL-safe Base64.
Base64 to JSON
Decode Base64 and JWT payloads into readable JSON.
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