Frequently Asked Questions
What can I encode and decode here?
You can run Base64 encode/decode and URL encode/decode operations on text values.
Can this help with API debugging?
Yes. It is useful for testing query parameters and encoded payload values.
Is encoded data uploaded anywhere?
No. All encoding and decoding happens in-browser.
Example input/output
Input: Hello, \u4e16\u754c
Output: Hello, 世界
How it works
This tool uses a JavaScript regular expression to find all \uXXXX sequences in the input and replaces each with the corresponding Unicode character using String.fromCharCode(). Processing runs in your browser.
Common use cases
- Decode Unicode escape sequences from source code into readable characters
- Inspect the actual characters represented by \u escape sequences
- Convert escaped Unicode back to human-readable text