Online Base64 Validator Tool
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Online Base64 Validator Tool

Our online Base64 validator tool is a useful web application that allows users to validate the correctness of their Base64 encoded data. This tool is particularly valuable for ensuring that encoded content is accurate and error-free. With the Online Base64 Validator Tool, users can quickly determine if their Base64 data follows the correct format.

Base64 Validator

Input

What is Base64?

Base64 is a method of encoding binary data into ASCII characters to facilitate data transfer and storage.

What is Base64 Validator Tool?

The Base64 Validator Tool is an online utility designed to verify the integrity and accuracy of Base64-encoded data. This tool assists users in confirming whether their Base64-encoded content adheres to the correct formatting and does not contain any errors.

The program is not only capable of interpreting Base64 code, but also recognizes Base64URL and MIME-type Base64 encoded text.

Limitations of the Base64 Validator Tool

Please note that this program only checks that Base64 is syntactically correct, i.e. that the code does not contain any characters that should not occur in Base64 encoded text.

Thus, it may happen that, although Base64 is syntactically correct, it does not contain meaningful data.

How Do I Use the Online Base64 Validator?

  1. Simply enter the Base64 (or non-Base64) encoded text you want to test in the Input field.
  2. No need to press the button, the check will run automatically.
  3. If the input data contains valid Base64 characters, a green feedback will be displayed under Result, otherwise a red notice will be displayed to indicate invalidity.

Is It Secure To Use Your Base64 Validator?

Absolutely. Our program operates entirely on the client side, which means all the conversion processes occur within your browser. No data is sent to our servers, ensuring that your information remains under your control and confidential throughout the conversion process.

Base64 Valid Characters and Table

Uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), and two additional characters, typically “+” and “/”, comprise the set of 64 ASCII characters used in Base64 encoding. When the length of the binary data is not a multiple of three bytes, the “=” character is also used for padding.

ValueCharacterBinary Value
0A000000
1B000001
2C000010
3D000011
4E000100
5F000101
6G000110
7H000111
8I001000
9J001001
10K001010
11L001011
12M001100
13N001101
14O001110
15P001111
16Q010000
17R010001
18S010010
19T010011
20U010100
21V010101
22W010110
23X010111
24Y011000
25Z011001
26a011010
27b011011
28c011100
29d011101
30e011110
31f011111
32g100000
33h100001
34i100010
35j100011
36k100100
37l100101
38m100110
39n100111
40o101000
41p101001
42q101010
43r101011
44s101100
45t101101
46u101110
47v101111
48w110000
49x110001
50y110010
51z110011
520110100
531110101
542110110
553110111
564111000
575111001
586111010
597111011
608111100
619111101
62+111110
63/111111

Characters in which Base64 and Base64URL differ

Base64 employs a character set that includes special characters such as “+”, “/”, and “=”, which might cause problems in URL situations due to their unique meanings. Base64URL, on the other hand, uses a URL-safe character set by replacing “+” with “-“, “/” with “_”, and omitting padding with “=”.

Base64 CharacterBase64URL Equivalent
+
/_
= (Padding)(Padding omitted)