Decompile Node.js 21 .jsc Files
Node.js 21 runs on the V8 11.8 line. JSC Decompiler reads the V8 build straight from the bytecode header and turns compiled .jsc files back into readable JavaScript — no matching runtime required.
Bytecode fingerprint
Every .jsc file opens with a 4-byte little-endian magic header that identifies the V8 code-cache format. Node.js 21 files sit on the V8 11.8 line, paired with Electron 23–27 (V8 11.x).
0xC0DE05F2How to decompile a Node.js 21 .jsc file
Upload at jscdecompiler.com
Drag and drop your Node.js 21 .jsc file into the web app. Nothing to install.
Auto-detect the version
JSC Decompiler reads the magic header and selects the V8 11.8 deserializer automatically — you never pick a version by hand.
Download the JavaScript
View the reconstructed source in the browser, copy it, or download the .js file.
Node.js 21 version notes
- Node 21 shipped the later V8 11.x line (around 11.8) and shares the 0xC0DE05F2 magic family with Node 20.
- As a non-LTS 'current' release, Node 21 files are less common but appear in bleeding-edge builds.
- Because it sits on the same V8 major as Node 20, a Node 21 code cache uses the same bytecode format family, disambiguated by the header's version string.
Node.js 21 decompilation FAQ
Which V8 version is in Node 21?
The later V8 11.x line (about 11.8), the same major as Node 20.
Is Node 21 supported?
Yes. JSC Decompiler decompiles Node 21 .jsc files on the V8 11.x path.
Related versions
Decompile Node.js 21 bytecode now
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