Base64 Encoder/Decoder API

GET

Encode text to Base64 and decode strings back into plain text.

Base64 Encoder/Decoder encodes plain text into Base64 and decodes encoded strings back to readable characters. Submit any string with an encode or decode action to receive the converted output, the original input, and character length.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/base64?text=Hello%20World

Query parameters

textstring

Verification

Format

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

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "action": "encode",
    "original": "Hello World",
    "encoded": "SGVsbG8gV29ybGQ=",
    "length": 16
  }
}

About the Base64 Encoder/Decoder API

Base64 Encoder/Decoder works by converting text to Base64 encoding or decoding Base64 strings back to readable text. Returns the converted result along with length information.

What people use it for

Data Transmission: Encode binary data as Base64 for safe transmission over text-based protocols like email or HTTP
API Integration: Encode credentials or sensitive data in Base64 format for API authentication headers
File Embedding: Encode images or files as Base64 strings to embed them directly in HTML, CSS, or JSON
Data Storage: Convert binary data to Base64 for storage in text-based databases or configuration files

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 Base64 Encoder/Decoder

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 Base64 Encoder/Decoder API.

Read the docs →

Can I perform both encoding and decoding?

Yes. The Base64 Encoder/Decoder supports two-way conversion. You can convert plain text into Base64 format for safe transmission and decode Base64 strings back into human-readable text.

Is it cheap enough to encode or decode payloads for every request?

Yes. Each call costs 2 credits, which works out to about $0.0003 per call or $0.30 per 1,000 conversions on the Starter plan. Starter includes 100,000 conversions each month, and the Free plan gives you 100 conversions per month to test.

Does the response return the original input alongside the converted output?

Yes. Each response includes the original text, the action performed, the converted result, and the length of the input string. This makes it straightforward to verify what was processed without extra tracking.

Is this suitable for preparing data for storage or transmission?

Yes. It supports common data transmission, API integration, data storage, and file embedding use cases where text needs to be safely converted into Base64 or reconstructed.

Does decoding return readable text directly?

Yes. Passing a Base64 string to the decode endpoint returns the reconstructed readable text directly in the response alongside the original input string and length.

Request parameters — GET /v1/base64

Sent in the query string. 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
`text`Required	string	`Hello World`	The text to encode

Optional

Parameter	Type	Example	Description
`action`Optional	string	`encode`	The action to perform `encodedecode` default encode

Example request

1
2

curl "https://api.apiverve.com/v1/base64?text=Hello%20World&action=encode" \
  -H "x-api-key: YOUR_API_KEY"

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.

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 — GET /v1/base64

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": {
    "action": "encode",
    "original": "Hello World",
    "encoded": "SGVsbG8gV29ybGQ=",
    "length": 16
  }
}

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
`action`	string	`"encode"`	The action performed on the text
`original`	string	`"Hello World"`	The original input text before encoding
`encoded`	string	`"SGVsbG8gV29ybGQ="`	The Base64 encoded result of the input text
`length`	number	`16`	Length of the original input text

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	Base64 Encoder/Decoder 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 — GET /v1/base64

No SDK to install — this is a plain HTTPS call to /v1/base64 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/base64" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/base64-apiSource, issues and the examples this page is built from.ReferenceBase64 Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/base64npm APIVerve.API.Base64EncoderDecoderNuGet

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

Call it from Node.js — GET /v1/base64

Install the Node.js SDK, then call the Base64 Encoder/Decoder 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/base64

Node.js

const res = await fetch("https://api.apiverve.com/v1/base64", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/base64The published Node.js client, versioned and signed.GitHubapiverve/base64-apiSource, issues and the examples this page is built from.ReferenceBase64 Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

APIVerve.API.Base64EncoderDecoderNuGet

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

Call it from Python — GET /v1/base64

No SDK to install — this is a plain HTTPS call to /v1/base64 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/base64",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

Also published for

@apiverve/base64npm APIVerve.API.Base64EncoderDecoderNuGet

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

Call it from C# / .NET — GET /v1/base64

Install the C# / .NET SDK, then call the Base64 Encoder/Decoder 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.Base64EncoderDecoder

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/base64");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.Base64EncoderDecoderThe published C# / .NET client, versioned and signed.GitHubapiverve/base64-apiSource, issues and the examples this page is built from.ReferenceBase64 Encoder/Decoder API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/base64npm

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

Call it from Go — GET /v1/base64

No SDK to install — this is a plain HTTPS call to /v1/base64 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/base64", 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/base64npm APIVerve.API.Base64EncoderDecoderNuGet

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

Call it from PHP — GET /v1/base64

No SDK to install — this is a plain HTTPS call to /v1/base64 with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/base64");
curl_setopt($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/base64npm APIVerve.API.Base64EncoderDecoderNuGet

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

Call it from Ruby — GET /v1/base64

No SDK to install — this is a plain HTTPS call to /v1/base64 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/base64")
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/base64npm APIVerve.API.Base64EncoderDecoderNuGet

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

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Base64 Encoder/Decoder API

Try it — live request, no key required

About the Base64 Encoder/Decoder API

What people use it for

Ways to call it

Other ways to use Base64 Encoder/Decoder

Questions.

Request parameters — GET /v1/base64

Required

Optional

Authentication

Response — GET /v1/base64

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — GET /v1/base64

Resources

Also published for

Call it from Node.js — GET /v1/base64

Resources

Also published for

Call it from Python — GET /v1/base64

Resources

Also published for

Call it from C# / .NET — GET /v1/base64

Resources

Also published for

Call it from Go — GET /v1/base64

Resources

Also published for

Call it from PHP — GET /v1/base64

Resources

Also published for

Call it from Ruby — GET /v1/base64

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Base64 Encoder/Decoder API

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