Does Base64 encoding encrypt my data?

No. Base64 is an encoding scheme, not encryption. Anyone who receives a Base64 string can decode it instantly without a key. Do not use Base64 to hide sensitive data.

What is the difference between standard and URL-safe Base64?

Standard Base64 uses + and / as its 62nd and 63rd characters. These have special meaning in URLs, so URL-safe Base64 replaces them with - and _ respectively. The output is otherwise identical and interchangeable if you handle the substitution correctly.

What is binary (base 2)?

Binary is the native number system of computers. Every integer is represented using only the digits 0 and 1. Each digit position represents a power of 2: the rightmost is 2^0 (1), then 2^1 (2), 2^2 (4), 2^3 (8), and so on. The decimal number 10 is 1010 in binary (8 + 2).

What is hexadecimal (base 16) and why do developers use it?

Hexadecimal uses 16 digits: 0–9 and A–F. Developers prefer hex because it maps cleanly to binary: each hex digit represents exactly 4 binary digits (a nibble). This makes hex a compact way to express binary values — the 8-bit byte 11111111 is simply FF in hex, and 32-bit memory addresses fit in 8 hex characters. CSS color values (#FF6600), file magic bytes, and network masks are all commonly expressed in hex.

Tool comparison

Base64 Encoder / Decoder vs Number Base Converter

Base64 Encoder / Decoder and Number Base Converter are both encoding tools. They serve related purposes but are optimised for different tasks — understanding the distinction helps you choose the right one for your workflow.

Bottom line

Base64 encodes raw bytes as printable ASCII for text-safe transport; Number Base Converter changes the numeric radix between binary, octal, decimal, and hex. Use Base64 for binary payload embedding; use Number Base Converter for numeric value representation.

What each tool does

Base64 Encoder / Decoder

Base64 is an encoding scheme that converts binary data — or any text — into a string of 64 ASCII characters (A–Z, a–z, 0–9, +, /). It is used wherever binary data must travel through a medium that only handles text: embedding images in HTML or CSS, encoding credentials in HTTP Authorization headers, storing binary payloads in JSON, and passing data through URLs. Base64 does not encrypt data; it only changes the representation. The URL-safe variant replaces + with - and / with _ so the result is safe to embed in URLs and filenames without percent-encoding.

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Number Base Converter

The Number Base Converter converts integers between the four bases used in computing: binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a number in any base and the tool returns all four representations instantly — no manual arithmetic required. It also returns a grouped binary format (4-digit nibbles) and grouped hex (2-digit bytes) for easier reading, the bit length of the value, and whether it is a power of two.

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Side-by-side comparison

Feature	Base64 Encoder / Decoder	Number Base Converter
Category	encoding	encoding
Primary purpose	Encode text or data to Base64, or decode Base64 back to plain text.	Convert numbers between binary, octal, decimal, and hexadecimal.
Inputs	input, mode, charset	input, from_base
Outputs	output, valid, encoding, byte_length, error	input_normalized, from_base, decimal, binary, octal, hexadecimal, binary_grouped, hex_grouped, bit_length, is_power_of_two

When to use each

Use Base64 Encoder / Decoder when…

How to encode a string to Base64

Convert plain text to a Base64 string for use in APIs, HTTP headers, or data URIs.

How to decode a Base64 string

Convert a Base64-encoded string back to its original plain text.

Use Number Base Converter when…

Binary to Decimal Converter

Convert binary (base 2) number to decimal

Hex to Decimal Converter

Convert hexadecimal to decimal and other bases

Frequently asked questions

Does Base64 encoding encrypt my data?: No. Base64 is an encoding scheme, not encryption. Anyone who receives a Base64 string can decode it instantly without a key. Do not use Base64 to hide sensitive data.
What is the difference between standard and URL-safe Base64?: Standard Base64 uses + and / as its 62nd and 63rd characters. These have special meaning in URLs, so URL-safe Base64 replaces them with - and _ respectively. The output is otherwise identical and interchangeable if you handle the substitution correctly.
What is binary (base 2)?: Binary is the native number system of computers. Every integer is represented using only the digits 0 and 1. Each digit position represents a power of 2: the rightmost is 2^0 (1), then 2^1 (2), 2^2 (4), 2^3 (8), and so on. The decimal number 10 is 1010 in binary (8 + 2).
What is hexadecimal (base 16) and why do developers use it?: Hexadecimal uses 16 digits: 0–9 and A–F. Developers prefer hex because it maps cleanly to binary: each hex digit represents exactly 4 binary digits (a nibble). This makes hex a compact way to express binary values — the 8-bit byte 11111111 is simply FF in hex, and 32-bit memory addresses fit in 8 hex characters. CSS color values (#FF6600), file magic bytes, and network masks are all commonly expressed in hex.