ASCII Converter — Free Online Tool
Convert text to space-separated ASCII codes and back again.
Text → ASCII Codes
ASCII Codes → Text
About ASCII Converter
The ASCII Converter translates plain text into space-separated decimal character codes and turns those codes back into readable text. It is a handy reference for developers learning how characters map to numeric values and for debugging encoding issues in data streams and protocols.
Because the tool works with full Unicode code points, it reliably handles not just classic ASCII letters and symbols but also international characters and emoji. Everything runs locally in your browser, so conversions are instant and your input stays completely private.
How to Use ASCII Converter
- Type or paste your text into the 'Text → ASCII Codes' box.
- Click 'To ASCII' to generate the space-separated decimal codes.
- To reverse it, paste space- or comma-separated codes into the 'ASCII Codes → Text' box.
- Click 'To Text' to rebuild the original characters, then copy either result.
Key Features
Convert text to ASCII decimal codes and back in both directions
Full Unicode code point support for international characters and emoji
Accepts space or comma separated codes with flexible spacing
One-click copy for both codes and decoded text
100% client-side processing with no uploads or limits
Frequently Asked Questions
What ASCII codes does this tool output?
The tool outputs decimal character codes for each character in your text. For standard ASCII characters the values range from 0 to 127, but because it uses code points it also handles extended Unicode characters and emoji correctly.
What separator should I use for the codes?
When converting codes back to text, separate each number with a space or a comma. For example, 72 101 108 108 111 decodes to 'Hello'. Extra spaces and line breaks are handled automatically.
Does it support Unicode and emoji?
Yes. The converter reads full code points rather than single bytes, so characters beyond the basic ASCII range, including accented letters and emoji, encode and decode without corruption.
Is my text sent to a server?
No. Both conversions run entirely in your browser with JavaScript, so your text never leaves your device and there are no usage limits.