Dalvik Executable Format

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Dalvik is the process virtual machine in Google's Android operating system, which executes applications written for Android. Programs are commonly written in Java and compiled to bytecode for the Java virtual machine, which is then translated to Dalvik bytecode and stored in .dex (Dalvik EXecutable) and .odex (Optimized Dalvik EXecutable) files.

Identify it

Extensions	`.dex`
Signatures	`6465780a` at byte 0 (Dalvik Executable Format)
PRONOM	`fmt/694`
Wikidata	`Q29000585`

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Open it

PhotoRecOpen sourcereads · GNU General Public License
Dalvik VMOpen sourcereads · Apache Software License 2.0
diffoscopereads

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Documentation

kaitai grammar: https://github.com/kaitai-io/kaitai_struct_formats/blob/master/executable/dex.ksy

Sources

From Kaitai Struct format gallery, PRONOM, Wikidata. Updated 2026-10-24.

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