Inspect Bit Patterns and Flags

Convert numbers to binary to inspect individual bits, bitmasks, and flag combinations.

ログイン不要

Input base:

Decimal number

Quick values

Bit Operations tips

⚙️

Bitmasks use individual bits as boolean flags. Convert a decimal mask (e.g. 12 = 0b1100) to binary to see which bits are set.

💡

Unix permissions: 7 = 0b111 (rwx), 5 = 0b101 (r-x), 4 = 0b100 (r--). Convert each permission digit to see what it means.

🔢

Power of 2 check: a number is a power of 2 if its binary representation has exactly one 1 bit. The grouped binary display makes this obvious.

📊

Signed vs unsigned: 255 in 8-bit unsigned = 0xFF. As a signed byte, values 128–255 are negative. The bit pattern (11111111) is the same.

入力

Enter your data into the tool above. Everything stays local to your browser.

処理

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

ダウンロード

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓完全に無料 — 隠れたコストは永遠にありません

✓アカウント、メール、ログイン不要

✓ファイルがデバイスを離れることはありません

✓ファイルサイズの制限は一切ありません

✓出力に透かしなし

Convert Numbers for Programming

Convert between binary, octal, decimal, and hex wh

Convert Numbers for Networking

Convert subnet masks, port numbers, and IP address

Number Systems for Computer Science

Learn and verify binary, octal, hex conversions —

Decode Hex Dumps and Debug Logs

Decode hexadecimal values from crash reports, memo