Decode a base64 string

GEThttps://api.testingapis.com/api/utils/base64/decodeSign in to see this endpoint's URL

If the decoded bytes are not valid UTF-8, decoded is null and hex holds the bytes.

Parameters 1

Name	Type	Description
`value`	query · string	Standard or URL-safe base64, with or without padding. Send + as %2B in the query string. Default: "".

Responses

200: Success.
400: value is not valid base64.

Example

Request

curl -X GET "https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D" \
  -H "X-TestingApis-Key: YOUR_API_KEY"

Response200 OK

{
  "input": "aGVsbG8gd29ybGQ=",
  "decoded": "hello world",
  "isUtf8": true,
  "hex": "68656c6c6f20776f726c64",
  "length": 11
}

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api.testingapis.com

curl 'https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D' \
  -H 'X-TestingApis-Key: YOUR_API_KEY'

const res = await fetch("https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D", {
  headers: {
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
});
console.log(res.status, await res.text());

// The shape of the example response in the docs.
type ApiResponse = {
  input: string;
  decoded: string;
  isUtf8: boolean;
  hex: string;
  length: number;
};

const res = await fetch("https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D", {
  headers: {
    "X-TestingApis-Key": "YOUR_API_KEY",
  },
});
const body = (await res.json()) as ApiResponse;
console.log(res.status, body);

import requests

res = requests.get(
    "https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D",
    headers={
        "X-TestingApis-Key": "YOUR_API_KEY",
    },
)
print(res.status_code, res.text)

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Get, "https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D");
request.Headers.TryAddWithoutValidation("X-TestingApis-Key", "YOUR_API_KEY");
using var response = await client.SendAsync(request);
Console.WriteLine($"{(int)response.StatusCode} {await response.Content.ReadAsStringAsync()}");

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder(URI.create("https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D"))
                .header("X-TestingApis-Key", "YOUR_API_KEY")
                .GET()
                .build();
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.statusCode() + " " + response.body());
    }
}

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, err := http.NewRequest("GET", "https://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D", nil)
	if err != nil {
		panic(err)
	}
	req.Header.Set("X-TestingApis-Key", "YOUR_API_KEY")
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	data, err := io.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(res.StatusCode, string(data))
}

GEThttps://api.testingapis.com/api/utils/base64/decode?value=aGVsbG8gd29ybGQ%3D

Query

valuestring