JSON to CSV Converter API

POST

Generate clean CSV exports directly from raw JSON arrays.

JSON to CSV Converter converts an array of JSON objects into structured CSV text. It outputs formatted CSV content, detected column headers, and row counts, with support for custom delimiters like commas, tabs, or pipes.

Try it — live request, no key required

Request

POSTapi.apiverve.com/v1/jsontocsv

Body

jsonstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "row_count": 2,
    "column_count": 3,
    "columns": [
      "name",
      "age",
      "city"
    ],
    "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles"
  }
}

About the JSON to CSV Converter API

JSON to CSV Converter works by extracting all unique keys from JSON objects and converting them into CSV format. It handles quoted values, special characters, and supports custom delimiters. Maximum file size is 500KB.

What people use it for

Data Export: Convert API JSON responses to CSV format for importing into Excel, Google Sheets, or databases
Report Generation: Transform JSON data into CSV reports for business intelligence tools and data analysis
Legacy System Integration: Convert modern JSON APIs to CSV format for compatibility with legacy systems
Data Backup: Export JSON datasets to CSV format for archival and backup purposes

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use JSON to CSV Converter

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets

Questions.

Common questions about the JSON to CSV Converter API.

Read the docs →

Is it cheap enough to convert data for every user export request?

Yes. At 2 credits per call, the Free plan includes 100 conversions each month. On the Starter plan, 100,000 conversions work out to about $0.0003 per call, or $0.30 per 1,000 conversions.

What happens if objects in the JSON array have different keys?

The converter extracts every unique key across all objects to create the full list of CSV columns. Any object that does not contain a particular key will have an empty value for that cell.

Is there a limit on how large my JSON payload can be?

Yes, the maximum supported payload size is 500KB. Requests larger than 500KB are not processed, so large datasets should be chunked into smaller batches before sending.

Can I use custom delimiters like tabs or semicolons?

Yes. You can pass any custom delimiter character, such as a tab, semicolon, or pipe, in the request. The converter also automatically handles quoted values and escapes special characters.

Can I omit the header row from the generated CSV?

Yes. Setting the header parameter to false removes the top row of column names, leaving only the converted data rows. By default, headers are extracted and included.

Request parameters — POST /v1/jsontocsv

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`json`Required	array	`[{"name":"John","age":30},{"name":"Jane","age":25}]`	The JSON array to convert to CSV (must be array of objects)

Optional

Parameter	Type	Example	Description
`delimiter`Optional	string	`,`	The delimiter to use in the CSV `,;\t\|` default ,
`include_header`Optional	boolean	`true`	Whether to include column headers in the output (default: true) default true

Example request

curl -X POST "https://api.apiverve.com/v1/jsontocsv" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"json":[{"name":"John Doe","age":30,"city":"New York"},{"name":"Jane Smith","age":25,"city":"Los Angeles"}],"delimiter":",","include_header":true}'

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.
`content-type`Required	POST body	`application/json`

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — POST /v1/jsontocsv

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "row_count": 2,
    "column_count": 3,
    "columns": [
      "name",
      "age",
      "city"
    ],
    "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`row_count`	number	`2`	Total number of data rows in the converted CSV output
`column_count`	number	`3`	Total number of columns extracted from JSON object keys
`columns`	array	`[name, ...]`	Array of column header names extracted from JSON data
`csv`	string	`"name,age,city John Doe,30,New York Jane Smith,25,Los Angeles"`	Formatted CSV content with headers and data rows combined

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	JSON to CSV Converter calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — POST /v1/jsontocsv

No SDK to install — this is a plain HTTPS call to /v1/jsontocsv with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/jsontocsv" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/jsontocsv-apiSource, issues and the examples this page is built from.ReferenceJSON to CSV Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/jsontocsvnpm APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — POST /v1/jsontocsv

Install the Node.js SDK, then call the JSON to CSV Converter API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/jsontocsv

Node.js

const res = await fetch("https://api.apiverve.com/v1/jsontocsv", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/jsontocsvThe published Node.js client, versioned and signed.GitHubapiverve/jsontocsv-apiSource, issues and the examples this page is built from.ReferenceJSON to CSV Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — POST /v1/jsontocsv

No SDK to install — this is a plain HTTPS call to /v1/jsontocsv with your key in the x-api-key header. Swap in a real key and it runs as-is.

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/jsontocsv",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

Also published for

@apiverve/jsontocsvnpm APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — POST /v1/jsontocsv

Install the C# / .NET SDK, then call the JSON to CSV Converter API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.JSONtoCSVConverter

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/jsontocsv");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.JSONtoCSVConverterThe published C# / .NET client, versioned and signed.GitHubapiverve/jsontocsv-apiSource, issues and the examples this page is built from.ReferenceJSON to CSV Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/jsontocsvnpm

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — POST /v1/jsontocsv

No SDK to install — this is a plain HTTPS call to /v1/jsontocsv with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/jsontocsv", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/jsontocsvnpm APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — POST /v1/jsontocsv

No SDK to install — this is a plain HTTPS call to /v1/jsontocsv with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/jsontocsv");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/jsontocsvnpm APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — POST /v1/jsontocsv

No SDK to install — this is a plain HTTPS call to /v1/jsontocsv with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/jsontocsv")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/jsontocsvnpm APIVerve.API.JSONtoCSVConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

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JSON to CSV Converter API

Try it — live request, no key required

About the JSON to CSV Converter API

What people use it for

Ways to call it

Other ways to use JSON to CSV Converter

Questions.

Request parameters — POST /v1/jsontocsv

Required

Optional

Authentication

Response — POST /v1/jsontocsv

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — POST /v1/jsontocsv

Resources

Also published for

Call it from Node.js — POST /v1/jsontocsv

Resources

Also published for

Call it from Python — POST /v1/jsontocsv

Resources

Also published for

Call it from C# / .NET — POST /v1/jsontocsv

Resources

Also published for

Call it from Go — POST /v1/jsontocsv

Resources

Also published for

Call it from PHP — POST /v1/jsontocsv

Resources

Also published for

Call it from Ruby — POST /v1/jsontocsv

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — JSON to CSV Converter API

Data Conversion

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