ELF File Viewer | Online readelf for .so Files

ELF file viewer that reads Linux binaries and .so libraries like readelf: headers, sections, segments, symbols, needed libraries and build ID. No upload.

Also known as: elf viewer · elf file viewer online · readelf online · so file viewer · elf header viewer · elf symbol table viewer · android so file viewer · elf section viewer · linux binary analyzer · elf dependencies viewer

developer utilities

ssl and security tools

viewers

ELF Binary

Drop a Linux binary, .so library, .o object or core file here, or click to browse

Up to 512 MB. Read in your browser, never uploaded, and nothing in it runs. Android libraries sit in an APK under lib/arm64-v8a/.

ELF File Analysis

The ELF header, linked libraries, the newest GLIBC version the file needs, its exported symbols, sections, segments, notes and a PIE, NX, RELRO and stack canary check will appear here.

About ELF File Viewer

An ELF file viewer is used to inspect Linux executables, .so shared libraries, object files and core dumps without a Linux machine. It reads the headers, sections, program headers, symbols, dynamic section and notes that readelf prints, and adds a checksec-style hardening summary, the newest GLIBC version the file needs and the list of functions a .so exports.

Key Features

Reads 32-bit and 64-bit ELF files in either byte order: x86-64, AArch64, ARM, RISC-V, MIPS, PowerPC, s390x, LoongArch and more
Shows the ELF header, section headers, program headers with the section to segment mapping, the dynamic section and notes, with the values readelf prints
Lists .dynsym and .symtab with GNU symbol versions such as memcpy@GLIBC_2.14, plus Exports and Imports views and a CSV download
Finds the newest GLIBC, GLIBCXX and CXXABI versions a binary needs and checks them against Amazon Linux, RHEL, Debian and Ubuntu releases
Checks hardening the way checksec does: PIE, NX, RELRO, stack canary, FORTIFY_SOURCE, RPATH and RUNPATH, Intel CET and Arm BTI
Decodes GNU build IDs, Go build info, the Android API level and NDK version, and flags Android libraries that are not 16 KB page aligned

Use Cases

Checking a vendor's arm64-v8a .so for 16 KB page alignment before shipping an Android app update to Google Play
Confirming a binary really targets AArch64 before deploying it to AWS Graviton instances
Auditing PIE, RELRO, NX and stack canary flags across Linux binaries for a SOC 2 or FedRAMP security review
Finding out why a build fails with "version `GLIBC_2.38' not found" before it reaches Amazon Linux 2 or Ubuntu 22.04
Listing the JNI functions a native library exports while debugging an UnsatisfiedLinkError
Matching a crash to its debug symbols by the GNU build ID

Supported Formats

Executables and PIE binaries

Shared libraries (.so, .so.1)

Object files (.o) and kernel modules (.ko)

Core dumps

Android NDK libraries

Go and Rust binaries

Separate debug files (.debug)

Related Keywords

elf viewer

elf file viewer online

readelf online

so file viewer

elf header viewer

elf symbol table viewer

android so file viewer

elf section viewer

linux binary analyzer

elf dependencies viewer

How do I see which GLIBC version a binary needs?

On Linux, run objdump -T ./your-binary | grep GLIBC or readelf -V ./your-binary and look for the highest GLIBC_2.x version. Without Linux, open the file here: the Overview tab shows the newest GLIBC version it needs and which distributions ship a new enough glibc, such as Amazon Linux 2 with 2.26, Amazon Linux 2023 with 2.34 and Ubuntu 24.04 with 2.39. A binary built on a newer system usually fails on an older one with "version `GLIBC_2.xx' not found", so build on the oldest glibc you support, use a manylinux-style build image, or link against musl.

Your binary never leaves this tab

The file is parsed in your browser. Nothing is uploaded, nothing in it runs, and auto-save keeps only the text report, never the binary.

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Frequently asked questions

What is ELF File Viewer used for?

ELF file viewer that reads Linux binaries and .so libraries like readelf: headers, sections, segments, symbols, needed libraries and build ID. No upload.

Is ELF File Viewer free to use?

Yes. ELF File Viewer is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use ELF File Viewer?

No. ELF File Viewer works immediately in your browser with no signup, login, or email address required.

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