JSON Minifier

JSON Minifier | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Format Conversion
Input types: textarea, checkbox
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The JSON Minifier is a fast and efficient tool designed to compress your JSON data by stripping out all unnecessary whitespace, line breaks, and indentation. By reducing the payload size of your JSON data, it helps optimize network transmission speeds and reduce storage overhead while preserving the structural integrity of your data.

When to use

When preparing JSON payloads for production APIs to minimize bandwidth usage and latency.
When embedding configuration data directly into source code or environment variables where space is limited.
When cleaning up redundant duplicate keys from raw JSON data to ensure a clean, single-value structure.

How it works

1Paste your raw, formatted, or messy JSON data into the input text area.
2Toggle the 'Remove Duplicate Keys' option if you want to drop duplicate keys during parsing.
3Click the minify button to process the input, removing all spaces, tabs, and newlines.
4Copy the compressed, single-line JSON output directly to your clipboard.

Use cases

Optimizing payload sizes for REST or GraphQL API responses.
Reducing the footprint of JSON configuration files stored in cloud environments.
Cleaning up and deduplicating keys in raw JSON logs before analysis.

Examples

1. Optimizing API Payload Size

Backend Developer

Background

A developer needs to send a large configuration JSON payload from a server to a mobile client. The original file is heavily indented and contains spaces, making it 150KB.

Problem

The large file size increases network latency and mobile data usage for end-users.

How to use

Paste the formatted JSON into the input area, leave 'Remove Duplicate Keys' unchecked, and run the minifier.

removeDuplicates: false

Outcome

The JSON is compressed into a single line, reducing the file size by 35% and speeding up API response times.

2. Deduplicating and Compressing Configuration Files

DevOps Engineer

Background

An engineer is merging multiple environment configuration files and notices duplicate keys have been introduced in the JSON structure.

Problem

The duplicate keys make the configuration file messy and unnecessarily large.

How to use

Paste the merged JSON into the input area, check the 'Remove Duplicate Keys' option, and run the minifier.

FAQ

Does minifying JSON change the actual data structure?

No, it only removes unnecessary whitespace, indentation, and newlines, leaving the data structure and values intact.

What does the 'Remove Duplicate Keys' option do?

It parses the JSON and filters out duplicate keys, keeping only the last occurrence of the key in the object.

Can this tool handle invalid JSON?

The tool requires valid JSON syntax to parse and minify the data correctly.

Is there a file size limit for minifying JSON here?

The tool runs entirely in your browser, so it can handle large JSON payloads limited only by your browser's memory.

Does this tool send my JSON data to a server?

No, all processing is done locally in your browser, ensuring your data remains private and secure.

removeDuplicates: true

Run this tool

Inputs

Result

Examples that match this tool

Continue with connected tools and hubs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Optimizing API Payload Size

2. Deduplicating and Compressing Configuration Files

FAQ

Chat Transcript JSON Samples

Rich Media JSON Samples

JSON Samples

Terraform Plan JSON Samples

BOM Character Remover

JSON Key Extractor

HTML Minifier

Text Compressor

Text Redaction, Highlighting, and Presentation Formatting Tools

JSON Formatting, Diff, and Normalization Tools

JSON Interchange and Format Translation Tools

Text Case, Encoding, and Normalization Conversion Tools