Executable and Linkable Format 64bit Little Endian

Partly documented

other

The Executable and Linkable Format (ELF) was developed by Unix System Laboratories and is the standard binary format for executables, object code, shared libraries and core dumps in Unix and Unix-like systems running x86 architecture. Generally within Unix and Unix-like systems, ELF files generally do not have a format extension, however some ELF files may be found with a .elf or .o extension.

Identify it

Extensions	`.elf.o`
Signatures	`7f454c46020101` at byte 0 (ELF 64bit LSB)
PRONOM	`fmt/690`

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Open it

Listed for the family; check that the software handles this version.

CourgetteOpen sourcewrites · BSD licenses
flat assemblerOpen sourcewrites · 2-clause BSD License
moldOpen sourcewrites · MIT License
WildOpen sourcewrites · Apache Software License 2.0 / MIT License
ZigOpen sourcewrites · MIT License
Apache TikaOpen sourcereads · Apache Software License 2.0
FFmpegOpen sourcereads · LGPL-2.1-or-later / GPL-2.0-or-later
Linux kernelOpen sourcereads · GNU General Public License, version 2.0
PhotoRecOpen sourcereads · GNU General Public License
GNU gold linkerwrites
CodeWarrior Debuggerreads
Readelfreads
stripreads

Convert it

To	With	Fidelity	Command and losses
FLAC (Free Lossless Audio Codec) 1.2.1	FFmpeg	Partial	`ffmpeg -i in.bin out.flac` Audio track only: the video is dropped.
Waveform Audio	FFmpeg	Partial	`ffmpeg -i in.bin out.wav` Audio track only: the video is dropped.
Matroska 1-4	FFmpeg	Lossy	`ffmpeg -i in.bin out.mkv` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
MPEG 1/2 Audio Layer 3	FFmpeg	Lossy	`ffmpeg -i in.bin out.mp3` Lossy re-encoding.
MPEG-4 Part 14	FFmpeg	Lossy	`ffmpeg -i in.bin out.mp4` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
Ogg	FFmpeg	Lossy	`ffmpeg -i in.bin out.ogg` Lossy re-encoding.
WebM	FFmpeg	Lossy	`ffmpeg -i in.bin out.webm` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.

Documentation

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

Sources

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

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