Base64 to Binary Converter

Binary (base-2) is the fundamental representation of data in computing, where each bit represents a power of two. While Base64 is designed to safely encode binary data into printable ASCII, occasionally you need to inspect or manipulate the raw bit patterns themselves—for instance, when debugging protocol flags, steganographic payloads, or hardware register dumps. The Base64 to Binary converter decodes a Base64 string into its underlying bytes, then represents each byte as an 8-bit binary string (0s and 1s).

This tool handles standard and URL-safe Base64 alphabets, correctly processes padding, and outputs continuous bitstreams or space-separated bytes for readability.

Each Base64 block of four characters represents three bytes. After decoding, each byte (0–255) is converted to an 8-character string of 0s and 1s, ensuring leading zeros are included.

Accepts a valid Base64 string—characters A–Z, a–z, 0–9, +, / (or - and _), and up to two = padding characters. Whitespace is ignored.

A string of bits (0 and 1). In continuous mode, bits flow together; in spaced mode, each byte’s bits are separated by a space for clarity (e.g., “01000001 01000010”).

1. **Normalize**: Replace URL-safe characters. 2. **Decode**: Convert Base64 to bytes. 3. **Bit Conversion**: For each byte, generate an 8-bit binary string with leading zeros. 4. **Concatenate**: Join bit groups, using spaces if desired.

Network engineers debug protocol frames by inspecting individual flag bits. Firmware developers generate test vectors that require bit-level precision. Security researchers analyze bit patterns for hidden commands or signatures.

In digital art and steganography, artists encode messages at the bit level. This converter reveals the underlying bit sequences for analysis or transformation.

Decoding large Base64 strings and converting each byte to binary can be CPU-intensive. For big inputs, use streaming approaches or Web Workers.

Limit input size to prevent denial-of-service. Validate Base64 integrity to avoid decoding errors.

`QQ==` → `01000001`