Format CNPJ
Format Brazilian CNPJ numbers by adding or removing the 00.000.000/0000-00 mask. Accepts a list with one CNPJ per line. Runs in your browser.
What is CNPJ formatting for?
The official CNPJ mask is 00.000.000/0000-00. Here you can apply or strip that mask, with support for the new alphanumeric format (IN RFB 2.119/2022), which keeps letters in the correct positions.
Paste a list with one CNPJ per line. Each line runs on its own.
Processing is fully local. No CNPJ ever leaves your browser.
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Format CNPJ in bulk
Got a list of CNPJs with mixed formats, some masked and some just digits? Sorting that out by hand is tedious. Here you can apply or strip the 00.000.000/0000-00 mask across several CNPJs in one go.
Paste the list (one CNPJ per line) and say whether you want to add the formatting for a tidy display or remove it to keep only the digits. It comes in handy when you need to clean a base before importing, put together a report, or make records consistent between two systems.
Nothing goes through a server here: the processing happens in your browser and the CNPJs never leave your device. Paste the list and copy the standardised version.