64-bit
wixmachine scopegithub.com · known platform- File name
- OpenJDK21U-jdk_x64_windows_hotspot_21.0.12_8.msi
- SHA-256
- 845a30ebafdb4cbc4aff9c9d65b574a3dd154fbc5ef7f9412cd26628ffa5c22d
Eclipse Temurin JDK with Hotspot 21
by Eclipse Adoptium · GPL-2.0 with Classpath Exception
95/100how this is calculated
Eclipse Temurin JDK is the open source Java SE build based upon OpenJDK.
Record
- Latest version
- 21.0.12.8
- Release date
- 29 Jul 2026
- Official page
- https://adoptium.net/
- Package identifier
- EclipseAdoptium.Temurin.21.JDK
- Command
- jar, jarsigner, java, javac, javadoc, javap, javaw, jconsole, jdeprscan, jdeps, jlink, jmod, jps, jshell, jstat, keytool
Official downloads
These URLs are the ones Eclipse Adoptium declares in its own manifest. We do not proxy or shorten them, and we do not host a copy.
Verify the file you downloaded
Run this against the file on disk. If the output does not match the hash below, the file is not what Eclipse Adoptium published. Delete it.
Windows · PowerShell
Get-FileHash "OpenJDK21U-jdk_x64_windows_hotspot_21.0.12_8.msi" -Algorithm SHA256macOS · Linux
shasum -a 256 "OpenJDK21U-jdk_x64_windows_hotspot_21.0.12_8.msi"Expected output
845a30ebafdb4cbc4aff9c9d65b574a3dd154fbc5ef7f9412cd26628ffa5c22d
Got a different hash, or one you cannot place? Paste it into the hash checker and it will tell you which program and version it belongs to, past releases included.
Install Eclipse Temurin JDK with Hotspot 21 silently
This installer is an MSI package, so it takes the standard Windows Installer switches. That is a property of MSI itself rather than something the publisher declared.
64-bit · machine scope · MSI convention
msiexec /i "OpenJDK21U-jdk_x64_windows_hotspot_21.0.12_8.msi" /qn /norestartRun it from the folder holding the downloaded file, in a terminal opened as administrator when the package installs for all users. Silent means no window and no prompts, so check the exit code rather than waiting for something to appear: 0 is success and 3010 means it worked but wants a reboot.
How we scored this 95 out of 100
| Signal | Finding | Points |
|---|---|---|
| SHA-256 hash published | 1 of 1 installers ship a SHA-256 hashWithout a published hash there is no way to prove the file you downloaded is the file the publisher built. | 30 / 30 |
| Binary provenance | 1 on a recognised distribution platformThe strongest signal against a repackaged installer: the file should come from the publisher, not from a mirror nobody vouches for. | 29.8 / 35 |
| Served over HTTPS | 1 of 1 over HTTPSAn installer fetched over plain HTTP can be modified in transit. | 15 / 15 |
| Release recency | last release about 1 months agoSoftware that has not shipped in years accumulates unpatched vulnerabilities. | 15 / 15 |
| Licence declared | GPL-2.0 with Classpath ExceptionA declared licence tells you what you are actually allowed to do with the software. | 5 / 5 |
Opens 4 file types
Extensions Eclipse Temurin JDK with Hotspot 21 registers itself to handle.
Is Eclipse Temurin JDK with Hotspot 21 safe to download?
The installer comes from a recognised distribution platform rather than Eclipse Adoptium's own domain. That is normal for this kind of software and not a red flag by itself.
The installer on this page comes with the SHA-256 Eclipse Adoptium declared, so you do not have to take our word for it: hash the file you downloaded and compare.
What this does not tell you is whether the software itself is any good, or whether you want what it does once installed. A publisher can ship something you would rather not run and the download is still authentic. We answer the question we can measure and leave the other one to you.
If Windows says “Windows protected your PC” when you run it, that is SmartScreen reporting reputation, not a malware verdict — it shows up on perfectly legitimate software from small publishers and on releases that are simply new. The reverse matters more: no warning does not mean the file was checked.
How the 95/100 score is calculated · why the source matters more than the reputation
Install Eclipse Temurin JDK with Hotspot 21 with winget
Windows ships with a package manager, and this program is in it. The identifier below is the one Microsoft's repository uses, which is also where the download URL and hash on this page come from.
Install
winget install --id EclipseAdoptium.Temurin.21.JDK --exactUpgrade later
winget upgrade --id EclipseAdoptium.Temurin.21.JDKWhy --exact: without it winget matches on name as well as identifier, and a search that returns more than one package makes it stop and ask rather than install. Pinning the identifier is what makes the command safe to put in a script.
Not installing anything, or getting an error back? The commands that actually come up covers upgrading everything at once, what --include-unknown is for, and why winget can be missing from a machine that should have it.
Old versions of Eclipse Temurin JDK with Hotspot 2112 with hashes
The version history of Eclipse Temurin JDK with Hotspot 21, each release with the download URL the publisher declared at the time and the SHA-256 to check it against. Useful when an update breaks something and you need to downgrade to a build that worked.
We do not host any of these files and never re-upload them, which is the difference between this and an old-version download site.
21.0.11.10
released 28 Apr 202693A9C20F4CE967D78992EDC5E6FDCC250A56019080553D5D20846DECB51D9C01
21.0.10.7
released 03 Feb 20266BE8643444EC20758A34DDB1231E998AC77E72F661A0D5525A8AC3E078BCBCB0
E4726147566F21C09B654D0668D994D861CB134E5261D5E12584B887354896CD
21.0.9.10
released 30 Oct 2025E97F44C7915866C3127565A91373D03ADB639916186B24FC5E0F818A3BDE8D3F
45780D343AFA28884265003ECDE343700706B1BFCBC74B24F3F984E4EACE4E15
21.0.8.9
released 22 Jul 2025D82030E8689B19EFEDFBCE50CE38351CA81B302C06936584C6A27BDA18339DF8
05A3EA6FF8D8FA5CCA29D08F8D0BD67DAFD2CDFCB58A1293291F0EC654F70232
21.0.7.6
released 20 Apr 2025168E3C710448DBDD7E6FE2463B867339A72BE11A7C8615D72D19FB26572D3619
9F0EE5CEE06CAF2B020D2A1DCB6C346E5B6B98E6704BA6F165CC3CAA69BA7A70
21.0.6.7
released 23 Jan 2025C361F8A018CFFDAD1AD0A0CE3E5032FC7314DEC3F73642DC626A6121D487008B
1018C6BF8E39136E14A0637FF09410F34D696089953851F68869CE6C45D885F2
21.0.5.11
released 21 Oct 20248EF78A37811529D73D37E29A9FA24BF2D46D0D5D97C4F6E403EA9ADEBC55EAF3
9EAA94C1C87F5671A04D4FF3F687BF2448CCAE06F1B7928BF0C6BA2AEC60E9B7
21.0.4.7
released 19 Jul 20245EADBDEABDCA1A7ABF6416A6B35BF7AFD86E7EDADE7B5D44059FBCECACAEF372
21.0.3.9
released 18 Apr 2024264DB89E74213F3EA2D7B7379D1C2AC346797D03B4D88CBF4CE72C3FF96477A1
21.0.2.13
released 20 Jan 2024D0C53B1BFA741B7F6484200FAF8452E5A779357C2A29AA6B0DFDEDF7173E903F
21.0.1.12
released 27 Oct 202362E12510B0097BD784B14B035013A32C65E7DA334220C3DDFCC90D87440D240C
21.0.0.35
released 10 Oct 2023420B09998AE215154B6665C4D8167A74FD99EB3D4D85D5657BA317666E65E301
Publishers take old builds offline without warning, so a link here can stop working even though the hash stays correct forever. If you already have the file, the hash is what matters: it tells you whether what you have is what they published.
Every version on record13
Every Eclipse Temurin JDK with Hotspot 21 version with a published manifest, newest first. The most recent ones are listed above with their file names and hashes.
- 21.0.12.8
- 21.0.11.10
- 21.0.10.7
- 21.0.9.10
- 21.0.8.9
- 21.0.7.6
- 21.0.6.7
- 21.0.5.11
- 21.0.4.7
- 21.0.3.9
- 21.0.2.13
- 21.0.1.12
- 21.0.0.35
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