---
slug: "android-keystore-not-visible-sha256-fingerprint"
title: "When the SHA256 of the Keystore is Not Displayed with Keytool During Android App Development"
description: "If `keytool -list` does not show the SHA256 fingerprint of an Android keystore, you need the `-v` flag and a newer JDK — here are the details."
url: "https://www.ytyng.com/en/blog/android-keystore-not-visible-sha256-fingerprint"
publish_date: "2021-12-26T03:09:45Z"
created: "2021-12-26T03:09:45Z"
updated: "2026-05-11T13:08:22.921Z"
categories: ["Android"]
keywords: ""
featured_image_url: "https://media.ytyng.com/resize/20230812/4af203139dd844fa8b798b26d71e5173.png.webp?width=768"
has_video: false
has_music: false
video_urls: []
music_urls: []
lang: "en"
---

# When the SHA256 of the Keystore is Not Displayed with Keytool During Android App Development

<p>When developing for Android and trying to create a keystore and display the fingerprint using keytool</p>
<pre>% keytool -list -v -keystore android/certs/app.jks<br />Enter keystore password:<br />Keystore type: PKCS12<br />Keystore provider: SUN<br /><br />Your keystore contains 1 entry<br /><br />Alias name: key0<br />Creation date: Dec 26, 2021<br />Entry type: PrivateKeyEntry<br />Certificate chain length: 1<br />Certificate[1]:<br />Owner: CN=....<br />Issuer: CN=....<br />Serial number: 37...<br />Valid from: Sun Dec 26 11:29:11 JST 2021 until: Thu Dec 20 11:29:11 JST 2046<br />Certificate fingerprints:<br /> MD5: AA:5C:31:23:...<br /> SHA1: B1:41:37:24:...<br /> SHA256: <strong>SHA256withRSA</strong><br />Signature algorithm name: 2048-bit RSA key<br />Subject public key algorithm: 3<br />Version: {10}<br /><br />Extensions:</pre>
<p>If the fingerprint that should be displayed under SHA256 is not shown, and instead "SHA256withRSA..." continues without a newline, it is because the language is set to Japanese.</p>
<p>According to a <a href="https://stackoverflow.com/questions/67447237/keytool-sha256withrsa-written-instead-of-an-actual-sha256-on-my-production-key" target="_blank">StackOverflow answer</a>, if the language is set to French or German, setting the shell variable <code>LANG=C</code> should fix it. However, that alone did not work in my environment.</p>
<p>Referring to another <a href="https://stackoverflow.com/questions/17646757/how-to-set-default-language-for-java-keytool" target="_blank">StackOverflow answer</a>, I added the option <code>-J-Duser.language=en</code> to keytool, and it worked.</p>
<pre>% keytool <strong>-J-Duser.language=en</strong> -list -v -keystore android/certs/app.jks<br />Enter keystore password:<br />Keystore type: PKCS12<br />Keystore provider: SUN<br /><br />Your keystore contains 1 entry<br /><br />Alias name: key0<br />Creation date: Dec 26, 2021<br />Entry type: PrivateKeyEntry<br />Certificate chain length: 1<br />Certificate[1]:<br />Owner: CN=...<br />Issuer: CN=...<br />Serial number: 37....<br />Valid from: Sun Dec 26 11:29:11 JST 2021 until: Thu Dec 20 11:29:11 JST 2046<br />Certificate fingerprints:<br /> SHA1: AA:5C:31:...<br /> SHA256: <strong>B1:41:37:...</strong><br />Signature algorithm name: SHA256withRSA</pre>
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<p>After writing this, I realized that when the language is set to Japanese, the SHA256 fingerprint appears as a SHA1 fingerprint.</p>
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