Online Base64 to Image

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Base64 to Image

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What is Base64?

Base64 is a encoding algorithm that allows you to transform any characters into an alphabet which consists of Latin letters, digits, plus, and slash. Thanks to it, you can convert Chinese characters, emoji, and even images into a “readable” string, which can be saved or transferred anywhere.

To figuratively understand why Base64 was invented, imagine that during a phone call Alice wants to send an image to Bob. The first problem is that she cannot simply describe how the image looks, because Bob needs an exact copy. In this case, Alice may convert the image into the binary system and dictate to Bob the binary digits (bits), after that he will be able to convert them back to the original image. The second problem is that the tariffs for phone calls are too expensive and dictate each byte as 8 binary digits will last too long. To reduce costs, Alice and Bob agree to use a more efficient data transfer method by using a special alphabet, which replaces every “six digits” with one “letter”.


The history of the Base64 started long ago, in those times when engineers argued how many bits should be in a byte. Now we use eight-bit bytes, but before that were used seven-bit, six-bit, and even three-bit bytes. By the time the eight-bit encoding was approved as a standard, many systems used old encodings and did not support the “new standard”. This led to the fact that some data was simply lost during the transfer between the new and the old systems. For example, a mail server may discard the eighth bit when sending emails. Moreover, there was another problem with mail servers — they could only send text, but not binary data (such as images, video, archives). And so, in a magical way, clever minds develop an algorithm to solve these problems. Of course, over time, other binary-to-text encodings were developed, but thanks to the simplicity, efficiency and portability, Base64 became the most popular and was used almost everywhere.

For the first time the algorithm was described back in 1987 by a document describing the PEM protocol (if you are interested in the details, check the RFC 989 § 4.3). Since then, the algorithm has evolved, giving rise to new standards that are actively used throughout the world of IT.


Base64 is not an encryption algorithm and in no case should it be used to “hash” passwords or “encrypt” sensitive data, because it is a reversible algorithm and the encoded data can be easily decoded. Base64 may only be used to encode raw result of a cryptographic function.

Roughly speaking, in terms of information security, Base64 is just a foreign language that some people do not understand. Nevertheless, even they can understand the meaning of the encoded message simply by using an online translator, which instantly returns the original message.

Why is base64 needed?

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs be stored and transferred over media that are designed to deal with textual data. This is to ensure that the data remains intact without modification during transport.

How do I find the base64 image?

World's simplest image base64 encoder. Just select your JPG, PNG, GIF, or BMP picture or drag & drop it below, press Convert to Base64 button, and you get a base-64 string. Press button, get base64.

What is base64 format image?

Base64 is a method for converting data into encoded (two way hashed) string with proper printable characters only. It's also like you can save an image to database directly, by first encoding it's content base64 format.

The term Base64 is coming from a certain MIME content transfer encoding. Basically, Base64 is a collection of related encoding designs which represent the binary information in ASCII format by converting it into a base64 representation.

Base64 encoding schemes are generally used when there is a need to encode binary information that needs to be stored and transferred over media that are developed to deal with textual information. This guarantees that the data stays unchanged without modification during transfer. Base64 is generally used in a number of applications including electronic mail via MIME, and keeping complex information in XML.

The specific set of characters chosen for the 64 characters needed for the base can vary among implementations. The common concept is to select a set of 64 characters that is both part of a subset typical to most encodings. This mixture leaves the data impossible to be altered in transportation thru information systems, such as electronic mail, that were typically not 8-bit clean. The Base64 implementation in MIME uses a-z, A-Z and 0-9 for the first 62 values. Other Base64 variations share the same property but they use different symbols in the last two values.

Convert Base64 to image online using a free decoding tool which allows you to decode Base64 as image and preview it directly in the browser. In addition, you will receive some basic information about this image (resolution, MIME type, extension, size). And, of course, you will have a special link to download the image to your device.

How to convert Base64 to image online

Paste your string in the “Base64” field.

Press the “Decode Base64 to Image” button.

Click on the filename link to download the image.

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