Base64 Decode Tool
Decode Base64 strings with ease right in your browser.
Base64 Decoder Tool
About Base64 Encoding
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. The term Base64 originates from a specific MIME content transfer encoding.
Each Base64 digit represents exactly 6 bits of data. Three 8-bit bytes (i.e., a total of 24 bits) can therefore be represented by four 6-bit Base64 digits.
| Original Data | Bit Representation | Base64 Encoding |
|---|---|---|
| A | 01000001 | QQ== |
| AB | 01000001 01000010 | QUI= |
| ABC | 01000001 01000010 01000011 | QUJD |
Base64 is commonly used when there is a need to encode binary data that needs to 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.
Common Use Cases
Email Attachments
Base64 is used to encode email attachments so they can be transmitted over SMTP, which is designed to handle plain text.
Data URIs
In web development, Base64 is used to embed images and other files directly into HTML, CSS, or JavaScript as Data URIs.
Authentication
Basic authentication in HTTP uses Base64 to encode credentials before transmitting them over the network.
Data Storage
Base64 encoding is used to store binary data in databases that can only store text-based data.
XML/JSON Data
Binary data is often encoded as Base64 when included in XML or JSON documents to ensure data integrity.
Data Transmission
When transferring data between systems that do not support binary data transfer, Base64 provides a reliable solution.
Related Tools
Base64 to JSON Decoder
Convert Base64 encoded strings to formatted JSON instantly. Works locally in your browser with no data upload.
Base64 Encoder Tool
Generate secure password hashes for WordPress
Image to Base64 Converter
Convert images to Base64 encoding for web development and data embedding
Hex to Decimal
Convert hexadecimal numbers to decimal effortlessly
Average Calculator
Quickly calculate the average (arithmetic mean) of a set of numbers with our easy-to-use tool.
Text to Decimal
Convert text to decimal representation effortlessly