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Convert numbers between binary, octal, decimal, and hexadecimal instantly
Valid characters for base 10: 0-9
Bit Visualization
8 bits · 1 byte
Quick values
Discover the powerful capabilities of our number base converter.
See binary, octal, decimal, and hexadecimal simultaneously — no need to convert twice.
Visual bit grid shows each binary bit highlighted in color for numbers up to 32 bits.
Type directly in any base — switch the active base and the input validates in real-time.
Copy binary, octal, decimal, or hex result with prefix (0b, 0o, 0x) in one click.
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Browse All ToolsThe Number Base Converter is a free, browser-based utility designed for developer productivity. Convert numbers between binary, octal, decimal, and hexadecimal instantly Unlike desktop software that requires installation, this tool runs entirely in your browser — meaning no downloads, no accounts, and no data ever sent to a server. You get instant results right in your tab.
Whether you are a developer, student, writer, or designer, the Number Base Converter saves time by automating repetitive tasks that would otherwise require expensive software or technical knowledge. It is completely free with no usage limits — use it as many times as you need.
There are many tools available online for developer productivity, but the Number Base Converter on AppyGrid stands out for several reasons:
Getting started with the Number Base Converter takes less than a minute. Here is a detailed walkthrough:
Select Input Base
Click a base button (Base 2, 8, 10, or 16) to set which base you'll type in.
Enter Your Number
Type the number. Only valid characters for that base are accepted.
See All Conversions
All four base representations update instantly. Click any card to switch input to that base.
Copy or Continue
Click the copy icon on any card to copy the value with its prefix (0b, 0o, 0x).
The entire process typically takes under 30 seconds. The Number Base Converter is designed for speed — no waiting for server processing, no upload progress bars, and no page reloads.
The Number Base Converter is used by a wide range of professionals and enthusiasts across different fields. Here are some common use cases:
No matter your background or use case, the Number Base Converter delivers fast, accurate results without the overhead of heavyweight software or complex setup.
Here are detailed answers to the most common questions about the Number Base Converter:
A number base (radix) defines how many unique digits are used to represent numbers. Base 10 (decimal) uses 0–9, base 2 (binary) uses 0–1, base 8 (octal) uses 0–7, and base 16 (hexadecimal) uses 0–9 and A–F.
Hex is compact — each hex digit represents exactly 4 binary bits, so a byte (8 bits) fits in exactly 2 hex digits (e.g., 255 = 0xFF). This makes hex ideal for memory addresses, color codes (#RRGGBB), and byte values.
Octal is used primarily in Unix/Linux file permissions (e.g., chmod 755). Three octal digits map cleanly to 9 bits (three groups of 3), representing read/write/execute for owner, group, and other.
The converter supports values within JavaScript's safe integer range (±2^53 - 1). For binary, the bit visualization displays values up to 32 bits (0 to 4,294,967,295).
These are standard programming prefixes: 0b (or 0B) for binary, 0o (or 0O) for octal, and 0x (or 0X) for hexadecimal. They're used in JavaScript, Python, C, C++, and most modern languages.
The bit grid shows your number as individual binary bits, padded to the nearest byte boundary (8 bits). Lit bits (value 1) are highlighted in cyan, unlit bits (value 0) are shown as dim squares.
AppyGrid is a free online tools platform built for developers, writers, designers, and everyday users. Every tool on AppyGrid — including the Number Base Converter — is free, requires no account, and processes data entirely in your browser. We believe that useful utilities should be accessible to everyone, everywhere, without paywalls or data collection.
The Number Base Converter is one of 38+ free tools available on AppyGrid, covering developer productivity, text processing, image editing, SEO, calculators, and more. Related tags for this tool include: binary, hex, octal, decimal, base converter.
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