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QGIS Refactor Fields tool for altering attribute tables states:

This algorithm allows editing the structure of the attributes table of a vector layer. Fields can be modified in their type and name, using a fields mapping.

Fields can also be added and deleted. However, output also alters the length of all fields to 255. Is this expected behavior? Can original field lengths be retained?

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  • Are you saving the output as a shapefile?
    – Bera
    Commented Mar 9, 2023 at 6:18

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There are options to have Length and Precision changed, but this is set to 0 by default. (Which I believe for a text field will end up being 255).

so in answer to your question - can the original field lengths be retained? Yes, but you will need to manually set them.

My suggestion is to use a template that you import and apply.

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