Spreadsheet and data tools
Reshape tabular data for the tool that has to read it next, from a spreadsheet export to a clean JSON payload.
- 4 browser tools available
- 4 run in your browser
- No account
How it works
The same three steps every time
Choose a tool marked Runs in your browser, add your file and download the converted result. Tools marked Not available yet cannot convert files.
About spreadsheet and data conversion
CSV is simpler than it looks, and harder than it looks
A CSV file is just text, which is why every tool can read it, and there is no single standard for it, which is why so many tools read it wrongly. Commas inside quoted fields, escaped quotes, line breaks inside a cell, semicolons instead of commas in European exports and a stray byte order mark from Excel all break naive parsers. These converters handle the format as specified, so a field like "Smith, John" stays one value.
Types are where data gets lost
The dangerous part of a conversion is not the separator, it is the type guessing. A product code of 0071 becomes 71, a phone number becomes scientific notation, and a date in one country order is read in another. These tools convert only what is unambiguously a number or a boolean, keep everything else as text, and write dates in ISO form so they sort correctly and cannot be misread.
Spreadsheet and data conversion: common questions
Will Excel mangle my CSV?
Not with these tools. CSV output is written as UTF-8 with a byte order mark so accented characters survive, and values that only look numeric, such as codes with leading zeros, are kept as text.
Are the data tools private?
The CSV and JSON converters run entirely in your browser, so a customer list or a finance export is never transmitted. CSV to Excel and Excel to CSV also run inside your browser. No file is uploaded.
What happens to formulas?
CSV and JSON cannot hold a formula, so the calculated value is written instead. That is what an import expects, and it is why a total arrives as a number rather than as a SUM.