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Accepted File Types

Port currently accepts:
  • .csv
  • .xls
  • .xlsx
Max file size: 50 MB. For .xls and .xlsx, Port reads the first worksheet in the browser and converts it to CSV before upload.

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Upload Steps

  1. Open the Upload step.
  2. Drag/drop or browse for your file.
  3. Continue.
  4. Wait on the upload status screen until processing completes.

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Validation Behavior

During and after upload, Port validates:
  • Required headers for the chosen provider
  • Row parsing and data normalization
  • Basic field-level parsing (dates, amounts, IDs, etc.)
If validation fails, the upload step returns a specific error and you can retry with a corrected file.

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Tips

  • Keep only the worksheet you want to import in position one for Excel files.
  • Avoid changing provider-required header names.
  • Start with a smaller sample when testing a new provider export format.