Base64 to Image Decoder

Our base64 to image converter tool helps you decode base64 into images. It takes the base64 string and converts it into original image formats like JPG, PNG, etc. A base64 image format is a textual representation (in ASCII standard) of binary data, including images, videos, etc.

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The base64 to image online tool decodes the Base64 encoded string into an image. It allows you to decode Base64 format into common image formats like JPG, PNG, WEBP, GIF, BMP, ICO, & SVG and preview it directly & download it.

What is encoding?

Encoding is the process of converting a piece of information or instruction into a particular form.

Suppose you have three applications, X, Y, and Z.

  • An application X uses an A encoding scheme. More specifically, using the UTF-8 encoding scheme, that can encode up to 2,164,864 characters.
  • An application Y uses a B encoding scheme, a subset of the A encoding scheme. More specifically, it uses the ASCII encoding scheme, which can encode up to 128 characters.
  • An application Z uses the same encoding scheme as application A. It Means using the UTF-8 encoding scheme.

If you have to send the data from application X to application Z, the best solution is to send it from X to Z directly. Because if you involve application Y in the process, there is a high chance of data loss. Because application Y uses the encoding scheme that is a subset of an application's A encoding scheme. Therefore, it will not be able to interpret the data correctly.There is another encoding scheme called Base 64 Encode.

What is Base64 encoding, and how does Base64 encryption work?

Base64 is an encoding scheme that transforms binary data into ASCII characters. Base64 encoding converts binary data, including various media types, into a text-based string comprised of ASCII characters. This encoding turns binary data into text, making it usable in places meant for text, like embedding images into HTML, CSS, databases, etc.


Base64 encoding employs a set of 64 characters comprising:

  • uppercase letters (A-Z),
  • lowercase letters (a-z),
  • numbers (0-9),
  • the plus sign (+),
  • the forward slash (/),
  • and the equal sign (=) for padding purposes.

These characters are commonly used across various encoding schemes, contributing to reduced data loss during encoding and ensuring smooth data transfer to the intended destination. Most importantly, these characters are not control characters and are widely supported in many systems.

Now the next question is, how Base64 encryption works?

Step 1: Base64 encoding converts three bytes of data, further broken down into 24 bits.

Step 2: These three bytes (24 bits) are further broken down into four packs of six bits each.

Step 3:These six bits form a number corresponding to the index in the character set (of 64 characters that we discussed above) supported by the Base64 encoding scheme.

Moreover, if the input data's length is not a multiple of three bytes, then padding ('=') is added to the end of the Base64 output to cover the missing length i.e multiple of four.

What if the number of characters to be encoded does not come with a multiple of six bits?

If the number of characters does not equal to the multiple of six and short with any single or more characters, then the padding ('=') is added to it. Let’s understand this with the help of the following examples:

  • Suppose if the remainder is 18, we add an "=" to the encoded string. That means the encoded string is 6 bits short.
  • Suppose if the remainder is 12, we add "==" to the encoded string. That means the encoded string is 12 bits short.
  • Suppose the remainder is 6, we do not add anything to the encoded string. However, that means the encoded string is 18 bits short.

How to decode an image from Base64 Encoded string by using an online Base64 to Image Converter?

To decode an image from the Base64 Encoded string, perform the following steps.

  • Open the Base64 to Image Converter.
  • Enter a Base64 Encoded string.
  • Select the Image type in which you want results. The default one is PNG format. However, you can also select between JPG, ICO, GIF, BMP, Webp, and SVG formats.
  • After selecting the Image type, click on the Generate Image button.
  • The tool decodes the Base64 Encoded string and displays the image below in your specified format efficiently.
  • Click on the Download Image button to download that generated image. Base64 to Image Converter works well on Windows, MAC, Linux, Chrome, Firefox, Edge, and Safari.

Note: You can also click on the "Load Sample Data" button. To upload sample data, and can check the tool's functioning.


Why is base64 to image decoding needed?

Base64 to Image decode is one of the basic & needed actions. Below are some of the uses of this decoding:

  • Data Restoration: Base64 encoding converts binary image data into a text-based format for various purposes like storage, transmission, or representation. Decoding Base64 back into its original binary format (the image) is needed to restore the image data to its original state for display or further processing.
  • Data Retrieval from Databases or APIs: In scenarios where images are stored in databases or transmitted through APIs in a Base64-encoded format, decoding is necessary to retrieve the original image data for display on web pages, applications, or for processing within the software.
  • Displaying Images in Web Contexts: Images encoded in Base64 format can be directly embedded into web pages using HTML or CSS. Decoding the Base64 representation is essential to display these images on websites.
  • Manipulating Image Data: Decoding Base64 data allows developers and software applications to manipulate, edit, or process images in their original binary format, enabling various image-related operations.
  • Compatibility and Interoperability: Decoding Base64 data ensures compatibility across different systems and platforms, allowing the retrieved image data to be used across various software applications, databases, or web environments

Who can benefit from base64 to image decoding?

  • Web Developers: Developers working on web applications often encounter Base64-encoded images in data transfers, APIs, or when optimizing web performance by embedding images directly into HTML or CSS. Decoding allows them to display images on websites or process them for various functionalities.
  • Database Administrators: Database systems sometimes store images or binary data in Base64 format due to compatibility reasons or storage limitations. Decoding helps retrieve original images stored in databases for further usage or display.
  • Software Engineers: Those working on software applications, including mobile apps or desktop software, might receive images in Base64 format from APIs, network requests, or data sources. Decoding enables the utilization of these images within the software.
  • Data Analysts and Scientists: Professionals analyzing or processing data may encounter Base64-encoded images within datasets. Decoding assists in extracting images for visualization, analysis, or inclusion in reports.
  • Content Managers and Publishers: Individuals managing content for websites or digital platforms may find Base64-encoded images. Decoding allows them to handle images efficiently, update content, or ensure compatibility across various publishing systems.
  • End Users: In some cases, end users might benefit indirectly when using applications or services that utilize Base64 to image decoding. It ensures smooth image display and functionality within user interfaces, providing a better user experience.