A private reader for the browser

The file, as it was written.

Excel rewrites a CSV when it opens one. Dates shift with the locale, ZIP codes lose their zeros, and long account numbers get rounded. Excelsior reads every field as text and leaves it alone.

The right column is the file. Excelsior does not infer a type.
As written	Excel often shows	Excelsior shows
`01/02/2024`	1/2/2024 or 2/1/2024	`01/02/2024`
`02108`	2108	`02108`
`9876543210987654321`	9.87654E+18	`9876543210987654321`
`SEPT2`	2-Sep	`SEPT2`
`1/2`	2-Jan or 1-Feb	`1/2`
`19.90`	19.9	`19.90`

Parsing happens on this computer. After the first visit, Excelsior can be installed and opened offline. In Chrome or Edge, use the Install button. In Safari, choose Share, then Add to Dock.

The file, as it was written.

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