Why characters break
A CSV does not always say which text encoding it uses. If one app saves Windows-1252 or Shift_JIS and another assumes UTF-8, characters can look corrupted.
FIX TOOL · 02
CSV Encoding Fixer
Convert your CSV to UTF-8.
Repair strange characters and convert legacy CSV files to widely compatible UTF-8 while keeping Japanese and other Unicode text intact.
✓ Free✓ No signup✓ Runs in your browser
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CSV, TSV or text · up to 50 MB
GOOD TO KNOW
How do I convert a CSV to UTF-8?
Excel and UTF-8
Modern Excel can read UTF-8 reliably, but older exports and regional settings often produce legacy encodings. This tool writes standard UTF-8 with an optional BOM.
Preserving Japanese text
Shift_JIS detection is only a best guess. If the preview is wrong, choose the source encoding yourself before downloading.