Download certdoctor

Take the archive for your system from the releases page and unpack it. There is nothing to install.

The command line

Your systemThe archiveWhat you run
Windows on x64 certdoctor_0.1.0_windows_amd64.zip certdoctor.exe, signed
Windows on Arm certdoctor_0.1.0_windows_arm64.zip certdoctor.exe, signed
Linux on x64 certdoctor_0.1.0_linux_amd64.tar.gz ./certdoctor, one static file
Linux on Arm certdoctor_0.1.0_linux_arm64.tar.gz ./certdoctor, one static file
macOS on Apple silicon certdoctor_0.1.0_macos_arm64.tar.gz ./certdoctor, a link into certdoctor.app, signed and notarised

On Linux the command line needs no C library, so the same file runs in Alpine, in Ubuntu and in an image with nothing else in it. certdoctor --license prints the licence and the notices of the code by others that travels with it.

The window

certdoctor-gui has archives of its own, for three systems. Each carries the command line as well, because the window runs it:

Your systemThe archiveWhat you run
Windows on x64 certdoctor-gui_0.1.0_windows_amd64.zip certdoctor-gui.exe, signed
Linux on x64 certdoctor-gui_0.1.0_linux_amd64.tar.gz ./certdoctor-gui
macOS on Apple silicon certdoctor-gui_0.1.0_macos_arm64.tar.gz certdoctor-gui.app, signed and notarised

Keep the files of the window’s archive together. The window says why.

Every archive also carries LICENSE, THIRD-PARTY-NOTICES.md and the README, and the window’s archives THIRD-PARTY-NOTICES-GUI.md too.

Check what you downloaded

Each release lists the SHA-256 of every file in verify-SHA256SUMS.txt, and GitHub signs a statement of what went into each one. Check what you downloaded shows the commands.

From source

With Go 1.27.4 or newer:

git clone https://github.com/donislawdev/certdoctor
cd certdoctor
CGO_ENABLED=0 go build ./cmd/certdoctor

In PowerShell, set the variable on its own line first: $env:CGO_ENABLED = "0", then go build ./cmd/certdoctor. CGO_ENABLED=0 gives the same static binary the releases carry, the one that runs in an Alpine image as it is.

Next

Getting started takes you from the download to the first report.