What does 'byte-aligned' mean here?

It means the bit length is an exact multiple of 8 (length % 8 === 0), so the string could represent a whole number of bytes with nothing left over.

Why is there a limit on computing the decimal value for very long inputs?

Beyond 1024 bits, the resulting decimal number would be several hundred digits long, which is rarely useful to read and can be slow to render, so the tool omits it with a clear note instead of computing it anyway.

How is the decimal value calculated for long binary strings?

With BigInt (`BigInt("0b" + digits)`), not a regular JavaScript number, since ordinary numbers can only safely represent integers up to about 9 quadrillion (2^53), far smaller than many binary strings can encode.

What counts as a 'run' for the longest-run statistic?

A run is a maximal sequence of consecutive identical bits, e.g. in "1101" the longest run is the two consecutive 1s at the start, giving a longest run of 2.

Binary Data Analyzer - Analyze Binary Data Online

Overview

Introduction

Before working further with a chunk of binary data, it often helps to get a quick statistical overview: how long is it, how balanced are its 1s and 0s, and does it line up on a byte boundary?

This tool computes all of that in one pass, plus the string's unsigned decimal value, without needing to write a script just to check.

What Is Binary Data Analyzer?

A summary statistics tool for binary strings, reporting bit length, 1/0 counts and percentage, longest identical-bit run, byte alignment, and unsigned decimal value.

It treats the input purely as an unsigned bit pattern, there's no sign-bit or two's-complement interpretation involved.

How Binary Data Analyzer Works

The input is validated as binary and stripped of grouping characters, then a single pass counts 1s and 0s and tracks the current and longest run of identical consecutive bits.

Byte alignment is checked with `length % 8 === 0`, and the unsigned decimal value is computed with `BigInt("0b" + digits)` for inputs up to 1024 bits, beyond which it's omitted with an explanatory note rather than computed.

When To Use Binary Data Analyzer

Use it to get a quick sanity check on a binary value, its length, balance of bits, and byte alignment, before feeding it into another process.

It's also useful for spotting unusually long runs of the same bit, which can be relevant for signal analysis or before applying run-length encoding.

Often used alongside Binary RLE Encoder and Binary Stream Comparer.

Features

Advantages

Reports several useful statistics in one pass rather than requiring separate tools for each.
Uses BigInt for the decimal value, so it stays accurate even for binary strings far too long for a native JavaScript number.
Clearly documents its own decimal-conversion limit rather than silently truncating or erroring on long input.

Limitations

Input length is capped at 100,000 bits overall, and the decimal-value conversion specifically is capped at 1024 bits (about 308 decimal digits) to keep output readable and fast to render.
Treats the string strictly as unsigned; it has no option to interpret the leading bit as a sign for two's-complement values.

Examples

Analyzing a short binary string

Input

Output

Bit length: 4
Count of 1s: 3
Count of 0s: 1
Percentage of 1s: 75.00%
Longest run of identical bits: 2
Byte-aligned (length % 8 === 0): No
Unsigned decimal value: 13

4 bits, three 1s and one 0 (75%), the longest run is the two leading 1s, 4 isn't a multiple of 8, and 1101 in binary is 13 in decimal.

Analyzing a byte-aligned string

Input

11110000

Output

Bit length: 8
Count of 1s: 4
Count of 0s: 4
Percentage of 1s: 50.00%
Longest run of identical bits: 4
Byte-aligned (length % 8 === 0): Yes
Unsigned decimal value: 240

8 bits split evenly between 1s and 0s, the longest run is 4 (either half), the length is a multiple of 8, and 11110000 in binary is 240 in decimal.

Best Practices & Notes

Best Practices

Use the byte-alignment check before treating a binary string as a sequence of whole bytes elsewhere.
For inputs beyond the 1024-bit decimal cap, rely on the other statistics (length, run, byte alignment) and convert only a shorter segment to decimal if you need that value.

Developer Notes

Implemented with a single forward pass tracking a running `currentRun`/`longestRun` pair alongside a 1s counter, followed by `BigInt("0b" + digits).toString(10)` for the decimal value, gated behind the `BINARY_DATA_ANALYZER_DECIMAL_MAX_BITS` (1024) constant.

Binary Data Analyzer Use Cases

Sanity-checking a binary value's length, bit balance, and byte alignment before further processing
Spotting unusually long runs of the same bit before applying run-length encoding
Quickly converting a moderately long binary string to its unsigned decimal value

Common Mistakes

Expecting a decimal value for extremely long inputs; beyond 1024 bits it's intentionally omitted rather than computed.
Interpreting the reported decimal value as a signed (two's-complement) number, it's always the unsigned interpretation of the bits.

Tips

Use the longest-run statistic as a quick signal for how compressible the data is with Binary RLE Encoder.
If you only need the decimal value and the string is short, Binary Data Analyzer's report already includes it, no separate converter needed.

Binary Data Analyzer