mfsr is a command-line tool for batch replacing multiple strings across multiple files.
It also supports character encoding conversion, newline code conversion, and BOM (Byte Order Mark) control.
Built with .NET 10 Native AOT as a standalone executable — no .NET runtime required.
Publisher’s description
What is mfsr?
mfsr is an open-source terminals & cli tool program for Windows from motoi-tsushima. It is written in C#.
Installation and requirements
Official installers exist for 64-bit as Portable. It runs without installation (portable).
Updates and version history
The current version is 1.1.2.0, released on October 2, 2026. 5 versions are listed since March 17, 2026, each with links to its own installer files. The last update is less than a month old.
Project description on GitHub: “rmsmf の .NET Core 版です。”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
- Updated in the last two months
Cons
- No native ARM64 build
In short: mfsr is an open-source terminals & cli tool tool for 64-bit PCs.
Is mfsr 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:
8AE0DD399EE681327D72349A4CED6407014A4A5DBCD7F8FE3DE17CFF2A31F160· 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 5 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 1.1.2.0Latest | October 2, 2026 | — | 64-bit ZIP |
| 1.1.1.0 | August 10, 2026 | — | 64-bit ZIP |
| 1.1.0.0 | August 1, 2026 | — | 64-bit ZIP |
| 1.0.5.0 | May 9, 2026 | — | 64-bit ZIP |
| 1.0.3.1-beta.1 | March 17, 2026 | — | 64-bit ZIP |
Install from the command line
Silent install ›winget install --id motoi-tsushima.mfsr -eRelated guide: How to use winget: install and update apps
Information
- Publisher
- motoi-tsushima
- Category
- Terminals & CLI tools
- Licence
- MIT
- Price
- Free
- Source code
- github.com/motoi-tsushima/mfsr
- Written in
- C#
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- Portable
- Version
- 1.1.2.0
- Released
- October 2, 2026
- Added to the catalogue
- March 17, 2026
- Versions listed
- 5
- Website
- snow-stack.net
- winget ID
- motoi-tsushima.mfsr
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is mfsr free?
Yes. mfsr is open-source software under the MIT licence.
Is mfsr 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 mfsr 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 mfsr run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of mfsr?
The versions page lists all 5 versions with links to their official installer files, back to March 17, 2026.
Can I use mfsr without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to mfsr?
PowerShell, QPDF, Oh My Posh, fzf and yq. The alternatives page compares them.
