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description: How to use the UID2 Token Validator to validate UID2 tokens against source DII and confirm that your token generation workflow is correct.
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# UID2 Token Validator
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The [UID2 Token Validator](https://token-validator.uidapi.com/)is a web-based tool that validates <Linkhref="../ref-info/glossary-uid#gl-uid2-token">UID2 tokens</Link> against their source <Linkhref="../ref-info/glossary-uid#gl-dii">directly identifying information (DII)</Link> to confirm that your token generation process is correct.
Publishers who generate UID2 tokens by providing DII sometimes receive tokens that appear valid but are unusable in the UID2 ecosystem. This happens when the normalization or hashing steps are not performed correctly. Because UID2 uses the normalized and hashed form of DII to derive the token, an error in either step produces a <Linkhref="../ref-info/glossary-uid#gl-raw-uid2">raw UID2</Link> that is unique to that publisher. This mismatched raw UID2 will not correspond to the one used by other participants for the same DII, meaning the publisher's tokens will not match up with those from other publishers, data providers, or advertisers' CRM uploads.
Select the **Operator** (environment) you want to validate against. For information about UID2 environments, see [Environments](../getting-started/gs-environments.md).
When you click **Validate Tokens**, the **Validation Results**table displays a row for each token-identifier pair, in the format shown in the following table.
|`Failed: Token does not match identifier`|トークンが提供された DII と一致しません。最も可能性の高い原因は、正規化またはハッシュ化の誤りです。|
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|`Failed: Invalid token`|トークンの形式が不正で、解析できません。|
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|`Failed: {"status":"unauthorized"}`|提供された API 認証情報が無効または許可されていません。|
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:::tip
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If the result is **Failed: Token does not match identifier**, compare the **Normalized Hash**shown in the results with the value your own implementation produced for the same DII. If they differ, the issue is in your normalization or hashing steps. For details, see [Normalization and Encoding](../getting-started/gs-normalization-encoding.md)and[Preparing Emails and Phone Numbers for Processing](ref-preparing-emails-and-phone-numbers-for-processing.md).
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結果が **Failed: Token does not match identifier** の場合、結果に表示される **Normalized Hash**と、同じ DII に対して自身の実装で生成した値を比較してください。異なる場合は、正規化またはハッシュ化のステップに問題があります。詳細については、[Normalization and Encoding](../getting-started/gs-normalization-encoding.md)および[Preparing Emails and Phone Numbers for Processing](ref-preparing-emails-and-phone-numbers-for-processing.md) を参照してください。
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UID2 に変換する入力データが許容可能な形式であることは非常に重要です。そうでない場合、期待される結果は得られません。たとえば、[Phone Number Normalization](../getting-started/gs-normalization-encoding.md#phone-number-normalization) で説明されているように、電話番号には国コードを含めるように正規化する必要があります。
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詳細は、[Preparing Emails and Phone Numbers for Processing](../ref-info/ref-preparing-emails-and-phone-numbers-for-processing.md) を参照してください。
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