JSON Parser Online

JSON Parser Online

A JSON parser reads JSON text and checks that it is valid. Paste JSON below and click Prettify: this free parser runs in your browser, shows the exact error if the syntax is broken, and prints valid JSON with clean indentation. Nothing is uploaded.

All JSON Tools

28 tools

Free, fast, runs in your browser. No login needed.

JSON Formatter & Beautifier

Beautify or minify JSON with custom indentation settings.

Open Workspace →

JSON Validator & Linter

Strictly validate JSON strings and identify exact syntax errors.

Open Workspace →

Compress JSON by removing whitespace and newlines.

Open Workspace →

JSON Repair / Fix

Auto-fix missing quotes, single quotes, and trailing commas.

Open Workspace →

Sort all keys in JSON objects alphabetically.

Open Workspace →

Convert JSON array to CSV format with auto-detection of nested arrays.

Open Workspace →

Convert CSV text to a JSON array of objects.

Open Workspace →

Convert JSON to XML structure.

Open Workspace →

Parse XML strings and convert them into JSON.

Open Workspace →

Convert JSON objects into YAML format.

Open Workspace →

Parse YAML and convert to JSON using js-yaml library.

Open Workspace →

JSON to TypeScript

Generate complete TypeScript interfaces from JSON.

Open Workspace →

JSON to Python Pydantic

Create Python Pydantic BaseModel classes from JSON.

Open Workspace →

JSON to SQL INSERT

Generate SQL INSERT statements from a JSON array.

Open Workspace →

JSON to HTML Table

Convert JSON array to a styled HTML table element.

Open Workspace →

JSON to Markdown Table

Generate markdown table format from JSON data.

Open Workspace →

JSONPath Tester

Test JSONPath expressions against your JSON data.

Open Workspace →

Convert nested objects into flat dot-notation key-value pairs.

Open Workspace →

Reverse flat dot-notation keys back to nested JSON.

Open Workspace →

Filter JSON Array

Filter JSON arrays by matching a key to a value.

Open Workspace →

JSON Diff & Compare

Compare two JSON objects and see exactly what changed.

Open Workspace →

JSON Schema Generator

Generate a draft-07 JSON Schema from any JSON sample.

Open Workspace →

Mock JSON Data Generator

Generate multiple realistic mock JSON objects from a sample.

Open Workspace →

Base64 to/from JSON

Encode JSON to Base64 or decode Base64 back to JSON.

Open Workspace →

Decode and inspect JWT tokens — header, payload, and expiry status.

Open Workspace →

Escape / Unescape JSON

Escape special characters in a JSON string or reverse it.

Open Workspace →

JSON Tree Viewer

View JSON as an interactive collapsible tree with color-coded types.

Open Workspace →

JSON Table Viewer

View a JSON array as a clean HTML data table.

Open Workspace →

INPUT

1

OUTPUT

1

How to parse JSON online

Paste JSON into the INPUT pane, or click File to open a .json file from disk.
Click Prettify (or press Ctrl+Enter). The input is parsed with the browser's native JSON.parse().
If the JSON is invalid, the status bar shows the parser error and its position. Fix it, or run it through JSON Repair.
Copy or download the formatted result, or open it in the JSON Tree Viewer to explore nested data.

What you can do after parsing

Once your JSON parses, the same workspace can validate it, minify it, sort its keys, or convert it to CSV, YAML, TypeScript interfaces and more. Every tool is free, needs no account, and processes data only on your device.

FAQ

How do I parse JSON online?

Paste your JSON into the input pane above and click Prettify (or press Ctrl+Enter). The parser runs JSON.parse() in your browser: valid JSON is printed back with clean indentation, and invalid JSON shows the parser's error message so you can find the broken character.

Is my JSON uploaded to a server?

No. Parsing, formatting and every conversion on parsejsononline.com run locally in your browser with JavaScript. Your data is never sent over the network, so it is safe to paste API responses, config files or tokens.

Why does my JSON fail to parse?

The most common causes are trailing commas, single-quoted strings, unquoted keys, and comments. None of these are allowed by the JSON specification. Use the JSON Repair tool to fix them automatically, then parse again.

What is the difference between a JSON parser and a JSON formatter?

A JSON parser reads text and turns it into a data structure, failing if the syntax is invalid. A formatter takes parsed JSON and prints it back with indentation. This page does both in one step: it parses your input, then pretty-prints the result.