What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It is commonly used to embed binary data in JSON, HTML, or email messages.

What does the binary output represent?

Each group of 8 bits (one byte) represents a single byte from the decoded data. Bits are displayed from the most significant bit (MSB) on the left to the least significant bit (LSB) on the right.

Does this tool handle padding characters?

Yes. The tool accepts standard Base64 padding and automatically appends missing trailing = padding characters if they were omitted.

Can I decode Base64 images or files?

You can paste any valid Base64 string. For large payloads (e.g., images encoded as data URIs), the binary table may be very long. The tool caps display at 512 bytes for readability but shows the total byte count.

What is the difference between Base64 and binary?

Base64 is a text representation of binary data. Binary is the raw bit sequence the computer uses internally. This tool bridges the two by decoding the Base64 text back to its original bytes, then showing each byte in binary notation.

Base64 to Binary Converter

Paste a Base64 string and instantly see the decoded bytes displayed as 8-bit binary groups.

Base64 Input

Binary Output

Enter a Base64 string and click Decode

#	Binary (8 bits)	Hex	Dec	Char

Copied!

Summary

This tool decodes a Base64-encoded string and displays the raw binary (bit-level) representation of every decoded byte. Each byte is shown as an 8-bit group alongside its hexadecimal and decimal equivalents, making it easy to inspect the underlying data structure of any Base64 payload.

How it works

Paste or type a Base64 string into the input field.
The tool decodes the string using the standard Base64 alphabet (A-Z, a-z, 0-9, +, /).
Each decoded byte is converted to its 8-bit binary representation.
Results display the binary bits, hex value, decimal value, and printable character for every byte.
Use the Copy button to copy the full binary output to your clipboard.

Use cases

Inspect the raw byte content of Base64-encoded data.
Understand how text characters map to binary at the bit level.
Debug Base64-encoded tokens, images, or file attachments.
Learn binary and hexadecimal representations in a hands-on way.
Verify encoded data integrity by examining individual byte values.
Explore how multi-byte UTF-8 characters are stored in binary.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu