Character Encoding Converter
Convert and restore garbled Japanese text
Features
Generate all 9 common patterns at once
Comprehensive coverage of UTF-8, Shift_JIS, EUC-JP source data and 4 misreadings
Automatic restoration by pasting
Automatically searches for original Japanese candidates and displays them in readable order
Exclude uncertain results through validation
Only displays candidates that pass bidirectional verification for accurate results
Includes common scenarios and prevention methods
Explains typical situations and how to prevent each type of garbling
How to use
Select a mode
Switch between "Create garbled text" and "Restore garbled text" using tabs
Paste text
Paste the target text in the input field and conversion runs automatically
Check results
Copy what you need from the results list using copy buttons
Use cases
Decode garbled Excel CSV
Read corrupted cell contents and recover the correct data
Decode garbled email text
Restore unreadable email messages from business partners
Investigate character code configuration errors
Identify which character codes mismatched and prevent recurrence
Create sample garbled text for display testing
Prepare intentionally garbled strings to verify layout integrity
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
Conversion process is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
Input text and conversion results and input suggestions are not stored on the server.
Updates
- update #121
Added new tool that can reproduce and automatically restore garbled characters