CSV to Excel
Convert a CSV file to an Excel spreadsheet online in your browser without uploading your file to a server.
What this tool does
NexKit CSV to Excel converts a CSV file into a real .xlsx spreadsheet, entirely in your browser, using a proper CSV parser that correctly handles quoted fields containing commas or embedded line breaks and doubled-quote escaping - not simple comma-splitting.
Every cell is written as plain text. Values like "007" or "00501" keep their leading zeros rather than being silently converted to numbers.
How to convert CSV to Excel
Upload a .csv file and click Convert. Your browser parses the file and builds a real .xlsx spreadsheet you can download immediately.
Accuracy and limits
This MVP accepts CSV files up to 10MB and 5,000 rows.
Privacy and file handling
Your CSV file is parsed and converted entirely in your browser. It is not uploaded to NexKit servers by this tool.
Frequently Asked Questions
Is my file uploaded?
No. Your CSV file is processed locally in your browser. It is not uploaded to NexKit servers by this tool.
Will leading zeros in codes or IDs be preserved?
Yes. Every cell is written as plain text, so values like "007" or a zip code like "00501" keep their leading zeros rather than being silently converted to numbers.
Does it handle commas inside a field?
Yes, as long as the field is quoted in the CSV (for example "Doe, John"), which is standard CSV formatting. Quoted fields containing line breaks and escaped quotes are also handled correctly.
What is the maximum file size?
This MVP accepts CSV files up to 10MB and 5,000 rows.