Which manufacturers does it decode?

Hikvision, Dahua, Hanwha Vision, Axis and Uniview. Any model in the catalog still links to its product page.

Can a decoded value be wrong?

Yes. Naming schemes have exceptions and are not fully published, so the decoder reads the pattern. The datasheet on the product page wins.

Decoding happens in your browser. Only the search for the matching product page asks the server.

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Paste a model from a label or a quote. See the series, resolution, form factor, lens and options it spells out.

Model number

Reads Hikvision, Dahua, Hanwha, Axis and Uniview model numbers.

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No pattern matched. Check for typos, or that it is one of the supported manufacturers.

Bulk Device Add reads models and part numbers from a list and fills in the facts.

Which manufacturers does it decode?: Hikvision, Dahua, Hanwha Vision, Axis and Uniview. Any model in the catalog still links to its product page.
Can a decoded value be wrong?: Yes. Naming schemes have exceptions and are not fully published, so the decoder reads the pattern. The datasheet on the product page wins.
Does it send my model anywhere?: Decoding happens in your browser. Only the search for the matching product page asks the server.