Miller is like awk, sed, cut, join, and sort for name-indexed data such as CSV, TSV, and tabular JSON. You get to work with your data using named fields, without needing to count positional column indices.
This is something the Unix toolkit always could have done, and arguably always should have done. It operates on key-value-pair data while the familiar Unix tools operate on integer-indexed fields: if the natural data structure for the latter is the array, then Miller’s natural data structure is the insertion-ordered hash map. This encompasses a variety of data formats, including but not limited to the familiar CSV, TSV, and JSON. (Miller can handle positionally-indexed data as a special case.)
## Features
- Miller is multi-purpose: it’s useful for data cleaning, data reduction, statistical reporting, devops, system administration, log-file processing, format conversion, and database-query post-processing.
- You can use Miller to snarf and munge log-file data, including selecting out relevant substreams, then produce CSV format and load that into all-in-memory/data-frame utilities for further statistical and/or graphical processing.
- Miller complements data-analysis tools such as R, pandas, etc.: you can use Miller to clean and prepare your data. While you can do basic statistics entirely in Miller, its streaming-data feature and single-pass algorithms enable you to reduce very large data sets.
- Miller complements SQL databases: you can slice, dice, and reformat data on the client side on its way into or out of a database. (Examples here and here). You can also reap some of the benefits of databases for quick, setup-free one-off tasks when you just need to query some data in disk files in a hurry.
- Miller also goes beyond the classic Unix tools by stepping fully into our modern, no-SQL world: its essential record-heterogeneity property allows Miller to operate on data where records with different schema (field names) are interleaved.
- Miller is streaming: most operations need only a single record in memory at a time, rather than ingesting all input before producing any output. For those operations which require deeper retention (sort, tac, stats1), Miller retains only as much data as needed. This means that whenever functionally possible, you can operate on files which are larger than your system’s available RAM, and you can use Miller in tail -f contexts.
- Miller is pipe-friendly and interoperates with the Unix toolkit
- Miller’s I/O formats include tabular pretty-printing, positionally indexed (Unix-toolkit style), CSV, JSON, and others
- Miller does conversion between formats
- Miller’s processing is format-aware: e.g. CSV sort and tac keep header lines first
- Miller has high-throughput performance on par with the Unix toolkit
- Not unlike jq (for JSON), Miller is written in portable, modern C, with zero runtime dependencies. You can download or compile a single binary, scp it to a faraway machine, and expect it to work.
Publisher’s description
What is Miller?
Miller by John Kerl is open-source Windows software in the developer utilities category. It ranks 21st by popularity among developer utilities in this catalogue. It is written in Go.
Installation and requirements
The publisher provides Portable installers for 64-bit, ARM64 and 32-bit Windows. It runs without installation (portable).
Updates and version history
The current version is 6.22.0, released on September 25, 2026. The version history goes back to August 31, 2023: 8 releases, all linked to the official files. That is about 2.6 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 9,695 times. The source code on GitHub (johnkerl/miller) has 10,049 stars. Similar programs include WinMerge, jq and x64dbg.
Project description on GitHub: “Miller is like awk, sed, cut, join, and sort for name-indexed data such as CSV, TSV, and tabular JSON”
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
- Updated in the last two months
- Large user base
In short: Miller is an open-source developer utilitie tool for 64-bit, ARM64 and 32-bit PCs.
Is Miller 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:
A8B7F5FE321528D181C771948F631115B9C17A8EBDF1C5809DE835349A9DD304· 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
Security practices (OpenSSF Scorecard)
Automated checks of the johnkerl/miller repository on GitHub by the Open Source Security Foundation, last run on October 19, 2026.
- Actively maintained10
- No dangerous workflows10
- No binaries in the repository10
- Published packages10
- Static code analysis10
- Licence declared9
- Pinned dependencies3
- Code review2
- Restricted token permissions0
- OpenSSF Best Practices badge0
- Security policy0
- Fuzzing0
- Signed releases0
- Branch protection0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 8 versions ›8 versions over 3 years · about 2.6 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 6.22.0Latest | September 25, 2026 | — | ARM64 ZIP64-bit ZIP32-bit ZIP |
| 6.21.0 | August 10, 2026 | — | ARM64 ZIP64-bit ZIP32-bit ZIP |
| 6.20.2 | July 4, 2026 | — | 32-bit ZIPARM64 ZIP64-bit ZIP |
| 6.13.0 | October 5, 2024 | — | 32-bit ZIP64-bit ZIP |
| 6.12.0 | March 18, 2024 | — | 64-bit ZIP32-bit ZIP |
| 6.11.0 | January 26, 2024 | — | 64-bit ZIP32-bit ZIP |
| 6.10.0 | January 2, 2024 | — | 32-bit ZIP64-bit ZIP |
| 6.9.0 | August 31, 2023 | — | 64-bit ZIP32-bit ZIP |
Install from the command line
Silent install ›winget install --id Miller.Miller -echoco install miller -yRelated guide: How to use winget: install and update apps
Also for other systems
brew install millerInformation
- Publisher
- John Kerl
- Category
- Developer utilities
- Licence
- BSD-2-Clause
- Price
- Free
- Source code
- github.com/johnkerl/miller
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- Portable
- Version
- 6.22.0
- Released
- September 25, 2026
- Added to the catalogue
- October 24, 2023
- Versions listed
- 8
- Updates / year
- 2.6
- Chocolatey downloads
- 9,695
- GitHub stars
- 10,049
- GitHub forks
- 248
- Website
- github.com
- winget ID
- Miller.Miller
- Chocolatey package
- miller
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Miller free?
Yes. Miller is open-source software under the BSD-2-Clause licence.
Is Miller 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 Miller 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 Miller run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Miller?
The versions page lists all 8 versions with links to their official installer files, back to August 31, 2023.
Can I use Miller without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to Miller?
WinMerge, jq, x64dbg, Biome and jadx. The alternatives page compares them.
