Free ASCII Converter
ASCII codes are the numeric backbone of text in computing. This free two-way converter turns characters into their decimal ASCII codes and decodes codes back into readable text — handy for debugging, CTF challenges and learning how encoding works.
How to Use the ASCII Converter
- Select the direction: Text to ASCII codes, or ASCII codes to Text.
- Type or paste your input — plain text, or codes separated by spaces or commas.
- Click “Convert” to get the result instantly.
- Copy the output with one click.
Features
Bidirectional conversion in a single tool: encode any Unicode character to its decimal code point, or paste a sequence of codes separated by spaces, commas or semicolons to decode them. Invalid codes are flagged with a clear error message instead of silently producing garbage, and the full Unicode range (up to U+10FFFF) is supported.
Benefits & Use Cases
Students use it to understand how characters map to numbers. Developers debug encoding issues and generate code tables. Puzzle solvers and CTF players decode numeric ciphers in seconds. It is also a quick way to check the exact code point of an unusual character you pasted from somewhere.
Tips
When decoding, you can mix separators — spaces, commas and semicolons all work. Remember that standard ASCII only covers 0–127; values above that are extended Unicode code points. Encoding is per character, so emoji produce their full code points (e.g. 128512 for ), not UTF-16 surrogates.
Frequently Asked Questions
Is the ASCII converter free?
Yes — free forever, no account needed.
What is ASCII?
ASCII is a character encoding that assigns numbers 0–127 to letters, digits and symbols. This tool also handles the full Unicode range beyond classic ASCII.
How do I decode codes back to text?
Switch the direction to “ASCII codes to Text” and paste codes separated by spaces, like “72 101 108 108 111”.
Why did I get an error decoding?
One of your values was not a number or was outside the valid Unicode range (0–1111411). Check for typos or stray characters.
Is my text uploaded anywhere?
No. Conversion happens locally in your browser; nothing leaves your device.
Related Tools
Unicode Text Converter
Encode text to \uXXXX escapes and decode them back free online. Two-way Unicode escape converter for JSON, JavaScript and Java — no sign-up.
Open tool →Text to Binary
Convert text to 8-bit binary code free online. UTF-8 bytes with space, line or continuous separators — no sign-up, runs in your browser.
Open tool →Text to Hex
Encode text as hexadecimal bytes free online. UTF-8 hex output with space, colon or continuous separators — no sign-up, runs in your browser.
Open tool →Text to Base64
Encode any text to Base64 free online. Unicode-safe encoder with output length stats, copy and download — no sign-up, runs in your browser.
Open tool →Text to Morse Code
Translate any text into Morse code free online. Full letters, numbers and punctuation plus optional audio playback — no sign-up needed.
Open tool →