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JSON Minifier - Convert JSON to String Online

Quickly minify JSON data and convert between JSON strings and objects with this free online tool.

Tags: compress code json minify code

🚀 416,446 total conversions (2 this month)

Practice Python with coding challenges

Solve hands-on problems right in this editor: run the sample tests, submit, and get an AI code review.

All Python challenges
Easy

Dot Product of Two Vectors

Multiply two vectors element by element and add the results: the core operation of every neuron.

You'll learn VectorsDot product
Neural networksaimachine learning
Python C++ C#
1 solved
View solutions (1)
Easy

Distance Between Points

Compute the straight-line distance between two points.

You'll learn Pythagorean theoremSquare roots
BeginnerFunctionsLearning-pathmath
Python C++ C#
1 solved
View solutions (1)
Easy

Count Pairs With a Sum

Count pairs of positions whose values add up to a target.

You'll learn Pairs of indexesAvoiding double counts
ArraysBeginnerLearning-pathNested-loops
Python C++ C#
1 solved
View solutions (1)
Easy

Average of Three

Average three whole numbers.

You'll learn ArithmeticDivision
BeginnerLearning-pathVariables
Python C++ C#
1 solved
View solutions (1)
Easy

Rectangle Perimeter

Compute the perimeter of a rectangle from its sides.

You'll learn ArithmeticReturn values
BeginnerLearning-pathVariables
Python C++ C#
1 solved
View solutions (1)
Easy

Join Customers and Orders

Join customers with their orders like a LINQ Join and report each customer's total spend.

You'll learn LINQ JoinGrouping
ArraysSorting
Python C++ C#
0 solved
No solutions yet
Easy

To-Do List

Keep a list of tasks: add them, mark them done, remove them and report what is still pending.

You'll learn Typed collectionsRecords
BeginnerSimulationStrings
Python C++ C#
0 solved
No solutions yet
Easy

Linked List Operations

Simulate a linked list: add at either end, remove from the front or by value, and reverse it.

You'll learn Linked listsSimulation
Data-structuresSimulation
Python C++ C#
0 solved
No solutions yet
Easy

Sum a Flat JSON Object

Parse a flat JSON object whose values are integers and add up the values.

You'll learn JSON parsingString splitting
ParsingStrings
Python C++ C#
0 solved
No solutions yet
Easy

WhenAll Total Time

Find how long a program takes when each group of tasks runs together with Task.WhenAll and groups run one after another.

You'll learn Async/awaitTask.WhenAll
ArraysBeginner
C++ Python C#
0 solved
No solutions yet
Medium

Parallel Task Completion Order

Run tasks concurrently with at most k at a time and report the order in which they finish.

You'll learn ConcurrencyPriority queues
SimulationSorting
Python C++ C#
0 solved
No solutions yet
Medium

Min Stack

Build a stack that reports its smallest element instantly after any push or pop.

You'll learn StacksRunning minimum
Data-structuresStacks
Python C++ C#
0 solved
No solutions yet

Introduction

This online JSON minifier tool helps you compress and optimize your JSON code effortlessly. It’s ideal for reducing file size and improving the performance of applications that handle JSON data.

How to Use This Tool

  1. Paste your JSON code directly into the editor or type it in.
  2. Click the Minify button to compress your JSON code.
  3. After minifying, you can:
    • Download the optimized result.
    • Save or share it using a unique link.
    • Sign in with Google or GitHub to save your minified JSON for future use.

What is JSON?

JSON (JavaScript Object Notation) is an open standard file format used for storing and exchanging data. It represents data as attribute-value pairs and arrays using a human-readable text format. JSON is widely used in web applications and APIs, often as a replacement for XML in AJAX systems due to its simplicity and efficiency.

Learn more about JSON from the official JSON documentation .

JSON Syntax

JSON supports two main data structures:

  • Objects: A set of name-value pairs enclosed in curly braces ({}).
  • Arrays: A list of values enclosed in square brackets ([]).

JSON defines the following value types: string, number, object, array, true, false, and null.

Here’s an example of JSON data: 

      
{
  "firstName": "Duke",
  "lastName": "Java",
  "age": 18,
  "streetAddress": "100 Internet Dr",
  "city": "JavaTown",
  "state": "JA",
  "postalCode": "12345",
  "phoneNumbers": [
    {
      "Mobile": "111-111-1111"
    }, {
      "Home": "222-222-2222"
    }
  ]
}

What is Minification?

Minification is the process of minimizing code and markup in your web pages and script files. It’s one of the main methods used to reduce load times and bandwidth usage on websites. Minification dramatically improves site speed and accessibility, directly translating into a better user experience. It’s also beneficial to users accessing your website through a limited data plan and who would like to save on their bandwidth usage while surfing the web.

Examples

Before minified

      
{
  "colors": [
    {
      "color": "black",
      "category": "hue",
      "type": "primary",
      "code": {
        "rgba": [
          255, 255, 255, 1
        ],
        "hex": "#000"
      }
    }, {
      "color": "white",
      "category": "value",
      "code": {
        "rgba": [
          0, 0, 0, 1
        ],
        "hex": "#FFF"
      }
    }
  ]
}

After minified

      
{"colors":[{"color":"black","category":"hue","type":"primary","code":{"rgba":[255,255,255,1],"hex":"#000"}},{"color":"white","category":"value","code":{"rgba":[0,0,0,1],"hex":"#FFF"}}]}