Download Testnizer

Free, MIT-licensed, no account required. Pick your platform — the installer pulls everything else. Auto-update is built in but disablable in Settings.

Latest builds: github.com/apinizer/testnizer-releases

macOS

Apple Silicon (arm64)

Testnizer-X.Y.Z-arm64.dmg

Download
Intel (x64)

Testnizer-X.Y.Z-x64.dmg

Download

On first launch right-click → Open. Ad-hoc signed during beta.

On Sequoia, if Gatekeeper still blocks: xattr -dr com.apple.quarantine /Applications/Testnizer.app

Windows

x64

Testnizer Setup X.Y.Z.exe

Download
arm64

Testnizer Setup X.Y.Z-arm64.exe

Download

SmartScreen will prompt during beta — More info → Run anyway.

NSIS installer. Per-user install by default; admin install also supported.

Linux

Debian / Ubuntu (deb, x64)

Testnizer-X.Y.Z-amd64.deb

Download
Debian / Ubuntu (deb, arm64)

Testnizer-X.Y.Z-arm64.deb

Download
AppImage (x64)

Testnizer-X.Y.Z-x86_64.AppImage

Download
AppImage (arm64)

Testnizer-X.Y.Z-arm64.AppImage

Download

sudo dpkg -i Testnizer-X.Y.Z-amd64.deb or chmod +x Testnizer-*.AppImage && ./Testnizer-*.AppImage.

Verify your download

Every release ships with SHA-256 checksums.

Compare the checksum from the release page against the file you downloaded. They must match exactly.

# macOS / Linux
shasum -a 256 Testnizer-1.0.3-arm64.dmg

# Windows (PowerShell)
Get-FileHash .\Testnizer-Setup-1.0.3-x64.exe -Algorithm SHA256

For air-gapped environments, download the installer and checksums.txt on a connected machine, verify, then transfer. See the verification guide for details.

First time installing?

The five-minute getting-started walkthrough imports a sample collection, runs your first request, and shows where your data actually lives.

Read getting started