Does the output keep the header row visually distinct?
Yes. When header-row mode is enabled, the first row is bolded and frozen in the XLSX output.
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Upload a CSV file and convert it into an XLSX spreadsheet. Choose the delimiter and whether the first row should be treated as a header row.
Tool Workspace
Upload/convert-style experience with deterministic output and download-friendly rendering.
Upload a CSV file to convert it into XLSX.
Yes. When header-row mode is enabled, the first row is bolded and frozen in the XLSX output.
Convert quoted CSV input into JSON rows with header or generated column names.
Use CSV to JSON next when the file needs one more cleanup or export step.
Next step: CSV to JSONConvert one JSON object or an array of objects into CSV with stable header output.
Use JSON to CSV next when the file needs one more cleanup or export step.
Next step: JSON to CSVEncode UTF-8 text into Base64 or decode Base64 back into plain text.
Use Base64 Encode / Decode next when the file needs one more cleanup or export step.
Next step: Base64 Encode / Decode