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Code & Deliveryabbreviation · /ˈdʒeɪsən/

JSON

In simple English

JSON is one of the most common data formats in modern software development. It uses a simple structure of key-value pairs, arrays, and nested objects that are easy for both humans to read and machines to parse. Unlike XML or other formats, JSON is compact and efficient, making it ideal for transferring data over networks. In tech workplaces, JSON is used everywhere: in REST APIs, configuration files, database responses, and frontend-backend communication. When developers say 'send this as JSON' or 'parse the JSON response,' they mean to use this specific format for data exchange. Understanding JSON structure is essential for anyone working with web APIs, mobile apps, or backend services. JSON has become the de facto standard for web APIs because it is language-independent, human-readable, and integrates seamlessly with JavaScript (the dominant web language). Whether you are building APIs, consuming them, or debugging data flow issues, you will encounter JSON constantly in your tech career.

Understand what JSON is, how it works, and why it is essential in modern web development.

At a glanceCEFR B2
Commonness5/5
Versatility5/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

Send the response as JSON
Parse the JSON object
This API returns JSON
Convert it to valid JSON
The JSON structure looks clean

Real examples

in a standup

"The backend team will return user data as JSON by end of day."

in a code review

"Make sure you validate the JSON response before processing it in the component."

in a team meeting

"We should agree on the JSON schema before the frontend and backend teams start integration work."

in a Slack message

"Can you check if this JSON is valid? I am getting a parsing error."

Don't say this

Handle with care. JSON is a format, not a verb or action. Avoid saying 'JSON this data' instead of 'format this data as JSON' or 'convert to JSON'.

We need to JSON this data before sending it.
We need to convert this data to JSON format before sending it.JSON is a noun (a format), not a verb. You cannot 'JSON' something.
The response is in JSON, so it must be correct.
The response is in valid JSON format, but we should still validate the data structure.Valid JSON syntax does not guarantee correct data or logic. Always validate content.
We use JSON instead of XML because it is better.
We prefer JSON to XML because it is more lightweight and easier to parse.Explain the specific technical reason, not just a vague comparison.
The JSON file has errors in the database.
The JSON structure in the database response contains validation errors.Be precise about where the JSON data exists and what the problem is.

Other forms

abbreviation

JSON

"JSON is the standard format for REST API responses."

adjective

JSON (as modifier)

"The JSON schema defines the structure of our API contracts."

noun

JSON object

"Each JSON object in the array represents a single user record."

Often used with

parse JSONTo read and interpret JSON data from a response or file
valid JSONJSON that follows correct syntax and structure rules
JSON schemaA template that defines what properties and data types a JSON object should have
JSON responseThe data returned by an API in JSON format
convert to JSONTo transform data from another format into JSON
JSON fileA text file (.json) containing JSON-formatted data

Similar words

JavaScript Object NotationThe full formal name for JSON; rarely used in conversation
data formatA general term; JSON is one specific format among many

Opposites

XMLCSVYAML

Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your API is returning data and you want to explain the format to a colleague. What do you say?

Complete the sentence

2. Before we send user data to the frontend, we need to format it as _______ to ensure compatibility.

Spot the mistake

3. Which sentence uses 'JSON' incorrectly?

Rewrite naturally

4. Rewrite this in natural tech English using 'JSON': 'We need to change the information into the format that looks like JavaScript objects so we can send it over the network.'

Questions

Quick poll

Have you said "json" in a standup this week?

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