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ASCII Converter

ASCII Converter

ASCII Converter supports bidirectional conversion between characters and ASCII codes, with decimal, hexadecimal, binary, and octal output for programming, protocol debugging, and learning.
ASCII Converter

Quick Start

1
Character → ASCII: enter text, click "Encode" to get ASCII codes; click "Decode" to restore characters
2
ASCII → Character: enter numeric codes to get corresponding characters
3
Display: decimal/hex/binary/octal are shown together by default
4
Batch: convert multiple characters or codes at once
5
Direction: choose Encode/Decode to set conversion direction

Common Scenarios

Programming

handle encodings and debug string issues

Data analysis

inspect special characters and encodings

Networking

understand and debug control characters in protocols

Education

learn computer fundamentals and encoding principles

Security

help identify invisible characters and check suspicious strings

Format conversion

convert between numbering systems

Conversion Parameters & Range

Code input: enter ASCII values in various formats
Binary: with 0b prefix, e.g., 0b1000001
Octal: with 0o prefix, e.g., 0o101 0o141
Decimal: e.g., 65 97 32
Hexadecimal: with 0x prefix, e.g., 0x41 0x61 0x20
Separators: spaces, commas, or semicolons
Character ranges: digits 48–57, uppercase 65–90, lowercase 97–122
Common codes: Space (32), 0 (48), A (65), a (97), LF (10), CR (13)
Binary display: show ASCII codes as 8-bit bytes (covering 0–127); characters beyond ASCII are shown by Unicode code points (U+XXXX)
Octal display: 0o-prefixed octal, common in Unix permissions
Decimal display: standard 0–127 values
Hex display: 0x-prefixed (case-insensitive), suitable for programming & debugging
Character preview: shows glyphs; control characters show names
Special characters: supports control chars such as newline (\n) and tab (\t)
Beyond ASCII: characters outside ASCII show their Unicode info; some may appear as surrogate characters (U+D800–U+DFFF)

Usage Advice

Text input: type or paste the text to convert
Input validation: ASCII codes should be within 0–127
Control characters: handle non-printables carefully
Debugging tip: detect hidden control characters in program output

Limitations & Compatibility

Range limit: standard ASCII supports 0–127 only
Beyond range: characters outside ASCII (0–127) will show Unicode info instead of ASCII values
Display limit: some control characters cannot be rendered directly
Compatibility: extended ASCII (128–255) may vary by system

Privacy & Security

All processing happens locally in your browser. You can replace, clear, and re-run the current content at any time.

FAQ

5

Continue with these related tools for the next step.