CSV Encoding Converter (EUC-KR ↔ UTF-8)

If Korean text in a CSV shows up garbled in Excel, or an older Korean system cannot read your UTF-8 file, re-save it with the right encoding. The converter auto-detects the source encoding and converts between UTF-8 (with or without BOM) and EUC-KR (CP949). It reads the result back to make sure it matches the original and lists the line and column of any character that EUC-KR cannot hold. Files are processed on your device.

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When to use it

Korean text is garbled in Excel

Save as "UTF-8 with BOM" so Excel recognises the encoding.

An older system only accepts EUC-KR

Save as EUC-KR (CP949). If a character such as an emoji is missing from EUC-KR, nothing is saved and its position is shown.

Convert several files

Drop several files at once; each gets its own result and download button.

How to use

Drop CSV or TXT files or click to choose.
Choose the target encoding and line endings. Leave the source on auto-detect in most cases.
Check the preview and download.

How it works

Detection: BOMs (UTF-8, UTF-16) first, then a strict UTF-8 check; anything else is read as EUC-KR (CP949).
EUC-KR table: Built on the spot from the browser's own EUC-KR decoder (the web standard windows-949), with no table file.
Read-back check: The output is decoded again and compared with the original; if they differ, nothing is offered for download.
Size: Up to 300 MB per file. Only the encoding and the chosen line endings change.