Check a CSV encoding locally.

Choose a small CSV and see whether its first 64 KB decodes strictly as UTF-8 or GB18030. The file stays in this browser tab and is never uploaded.

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Limits: this is a decoding check, not a guarantee of the source system's encoding. ASCII-only samples are ambiguous because they are valid in both encodings. The checker does not validate CSV columns, repair data, or write an output file. Keep the original and confirm representative Chinese text in the receiving application.

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CSV Desk 1.0.0 locally cleans UTF-8 or GB18030 CSV files and exports a separate UTF-8 BOM result with a JSON change report. If the duplicate rule or acceptance checks need agreement, use the fixed-scope service inquiry.

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Optional support helps maintain the public tools. It is not a CSV Desk purchase or a service order; use the purchase or inquiry links above for those.