How to use Hexadecimal text encoder
Convert UTF-8 text to hexadecimal bytes and decode valid hexadecimal back to text. The check runs when you submit the form. Its inputs are processed in this browser.
How the check works
Each UTF-8 byte becomes two hexadecimal characters. On decode, whitespace is removed and every pair is checked before decoding UTF-8.
The Overview tab explains the findings. Measured data lets you search individual fields and values, while JSON report shows the complete export. Export JSON to retain a baseline, or print the findings for your own records. Review the report before sharing it: browser characteristics, token claims, and file names can reveal information about your setup.
Read the result in context
Hexadecimal displays bytes, not Unicode code points. A non-ASCII character can occupy several bytes.
Understand the limits
Odd-length input, non-hex characters and invalid UTF-8 are rejected. This is representation conversion, not encryption.
Common questions
Where is the input processed?
In this browser tab. This tool does not submit its input to the site server or a third-party service.
What should I keep with a result?
Record the selected options, browser and time. Review exported values before sharing them. Generated passwords, tokens and HMAC secret keys are excluded from report exports.