Text to Binary, Hex, ASCII & Octal Converter Online Free
Turn any string into binary (01001000), hexadecimal (48), octal (110) or decimal ASCII codes — and reverse the process just as easily. The converter walks every character (including emoji and accented letters via UTF-8 byte handling), shows per-character breakdowns, and lets you pick bit width (7-bit ASCII or 8-bit bytes). Everything runs in your browser: nothing is uploaded, results appear as you type, and one click copies the full output for use in code, homework or CTF challenges.
Text to Binary, Hex, ASCII & Octal Converter In-Browser Workspace
Input data or select files to begin. 100% private, client-side execution with zero server transmission.
How to Use Text to Binary, Hex, ASCII & Octal Converter
- Step 1: Pick the direction: Text → Codes or Codes → Text with the mode toggle.
- Step 2: Paste or type your string; the opposite panel updates live as you convert.
- Step 3: Choose encoding: Binary, Hex, Octal or Decimal — plus 7-bit/8-bit for binary output.
- Step 4: Inspect the per-character table if you need the code point for each letter.
- Step 5: Copy any output panel with one click for pasting into editors or terminals.
About Text to Binary, Hex, ASCII & Octal Converter
Each character maps to a numeric code point; in UTF-8 that code point is stored as one to four bytes. For ASCII-range characters (U+0000–U+007F) the code point equals a single byte, so “A” is 65 decimal, 0x41 hex, 1000001 in 7-bit binary and 101 octal. Extended characters such as “é” or “😀” occupy multiple UTF-8 bytes, and this tool can show either the raw Unicode code point or each byte of the UTF-8 sequence — switch modes to see both. When decoding, binary input accepts whitespace-separated 8-bit groups (or continuous strings whose length is a multiple of 8); hex accepts “48 65 6C” or “0x48,0x65”; octal and decimal are split on commas, spaces or newlines. Invalid tokens raise a clear inline error instead of silent corruption. The bit-width selector pads binary bytes to 8 digits or trims pure-ASCII codes to 7, which matters when writing fixed-width protocols or homework answers. Conversion is O(n) over bytes and runs synchronously on each keystroke, so large pastes of a few hundred kilobytes remain responsive. Because decoding is exact integer arithmetic rather than floating point, round-tripping text → hex → text is lossless for every valid Unicode string, including emoji, RTL scripts and combining marks.
Frequently Asked Questions
Is my text sent to a server?
No — conversion happens entirely in your browser; the string never leaves your device.
Does it support emoji and non-English letters?
Yes. You can convert either the Unicode code point or each UTF-8 byte of multi-byte characters.
What is the difference between 7-bit and 8-bit binary?
7-bit is classic ASCII (0–127); 8-bit pads each byte to eight digits, which is what most protocols and files use.
Why does my binary decode fail?
The input length must match complete bytes (groups of 8 bits) and each group must contain only 0 and 1.
Can I paste a continuous binary string without spaces?
Yes — as long as the total length is a multiple of 8, the tool splits it into bytes automatically.