Mockzilla is an open-source mock server for OpenAPI specifications. Point it at a spec and get a working API mock in seconds with realistic schema-based responses, request validation, configurable latency and errors, multiple APIs on one server, and upstream proxying with automatic mock fallback. Use it locally, in CI/CD, or in offline and air-gapped environments.
Publisher’s description
What is Mockzilla?
Mockzilla by Mockzilla is open-source Windows software in the languages & sdks category. It is written in Go.
Installation and requirements
The publisher provides Portable installers for 64-bit and ARM64 Windows. It runs without installation (portable).
Updates and version history
The current version is 2.8.10, released on August 12, 2026. The version history goes back to May 15, 2026: 17 releases, all linked to the official files.
Popularity and file types
The Chocolatey package has been downloaded 608 times. The source code on GitHub (mockzilla/mockzilla) has 111 stars. Similar programs include Go Programming Language, LLVM and Deno.
Project description on GitHub: “Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Portable: runs without installation
In short: Mockzilla is an open-source languages & sdk tool for 64-bit and ARM64 PCs.
Is Mockzilla safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
AACE6C5E8056CDBFEFB031CA4FE6D500B87EDC608438FDD22D1006DDD9CBB191· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 17 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 2.8.10Latest | August 12, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.9 | August 11, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.8 | August 9, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.7 | August 8, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.6 | August 8, 2026 | — | 64-bit PortableARM64 Portable |
| 2.8.5 | August 8, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.4 | August 7, 2026 | — | ARM64 Portable64-bit Portable |
| 2.8.3 | July 29, 2026 | — | ARM64 Portable64-bit Portable |
Install from the command line
Silent install ›winget install --id Mockzilla.Mockzilla -echoco install mockzilla -yProgram files (.exe): mockzilla.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Mockzilla
- Category
- Languages & SDKs
- Licence
- MIT
- Price
- Free
- Source code
- github.com/mockzilla/mockzilla
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- Portable
- Version
- 2.8.10
- Released
- August 12, 2026
- Added to the catalogue
- May 22, 2026
- Versions listed
- 17
- Chocolatey downloads
- 608
- GitHub stars
- 111
- GitHub forks
- 6
- Website
- github.com
- winget ID
- Mockzilla.Mockzilla
- Chocolatey package
- mockzilla
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Mockzilla free?
Yes. Mockzilla is open-source software under the MIT licence.
Is Mockzilla safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Mockzilla with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Mockzilla run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Mockzilla?
The versions page lists all 17 versions with links to their official installer files, back to May 15, 2026.
Can I use Mockzilla without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to Mockzilla?
Go Programming Language, LLVM, Deno, CMake and Yarn. The alternatives page compares them.
