Overview

OxyROMon is a free, Rust-based command-line ROM organizer for people who want to validate and maintain collections against recognized databases. Its archival-first approach is the draw; the command-line workflow and DAT-based setup make it a poor fit for anyone seeking a polished, browser-led library manager.

It supports original and lossless ROM formats, and can create exports in popular lossy formats without changing the archival files. That separation suits collectors preparing playable copies for other systems while keeping a lossless collection intact.

Key features

OxyROMon covers the core collection workflow in one CLI: import ROMs and DATs, validate and check files, convert and export them, and purge files. Hash verification and integrations with No-Intro and Redump for consoles, and MAME or FBNeo for arcade systems, make it a practical choice for database-driven verification. No-Intro DAT handling checks for updates but does not download the files; Redump DATs can be downloaded and updated, so maintaining those sources takes different amounts of manual work.

Logiqx DAT files extend support across console, computer, and arcade systems. Collections can be sorted by region, in 1G1R mode, or both, while arcade sets can be organized by BIOS, parent, and clone relationships. Multi-disc games can be represented with generated M3U playlists. These options are useful for varied archives, but they presume a user comfortable working with DATs and command-line operations.

Settings live in SQLite, with global defaults and per-system overrides. The optional server adds a web UI for browsing collections, managing settings, and importing ROMs and DATs, plus a GraphQL endpoint at /graphql. It defaults to loopback, but URL imports can reach hosts the server can access; keep it local unless you understand the exposure. The README also identifies automatic No-Intro DAT downloads, merged arcade sets, and additional web UI actions as unfinished work.

Pricing

OxyROMon is free: 0.00 USD per free. There is no paid tier or stated usage cap, so its main trade-off is operational rather than financial: users bring the command-line and DAT workflow, and No-Intro DAT files still need to be obtained separately.

Platforms

OxyROMon supports Linux, macOS, and Windows, with API, self-hosted, and web options through its optional server. The CLI is the primary interface; the web UI is an additional way to manage and browse a collection, not a replacement for the underlying archive workflow.

Who it's for

Choose OxyROMon if you manage ROM archives and need validation, sorting, conversion, or exports for external systems such as EverDrive or ODE. It is less suitable if you want metadata scraping or a browser-first experience: metadata scraping is not supported, and the documented workflows center on the CLI and DAT files.

Pros and cons

Pro: Original and lossless files remain untouched when creating lossy exports, preserving a clean archival source.
Pro: Console, computer, and arcade coverage combines with region and 1G1R sorting and arcade set organization.
Pro: Validation, hash checks, conversion, export, purge, and M3U generation cover substantial archive-maintenance needs.
Con: No-Intro update checks do not fetch DAT files, leaving that part of upkeep to the user.
Con: The CLI and DAT-centered design demand more technical comfort than a browser-led collection manager.
Con: Exposing the optional server beyond loopback requires caution because URL imports can access hosts reachable by the server.

Alternatives

Compare ROM Management Software if you want to consider the wider category. Igir is another free option for Linux, macOS, Windows, and self-hosted use, with no stated usage or collection-size limit. RomM may suit readers who want broader device coverage including Android and iOS, and a free-forever offering with no paid features.

verifydump is a narrower alternative when the job is verifying .chd and .rvz images against Redump Datfiles. RomForge is a free desktop app for Linux, macOS, and Windows. ROMie is free to download and use on Linux, macOS, and Windows. ClrMamePro is a free option for Linux and Windows. JRomManager and Nearcade are also free alternatives, with web and self-hosted platform options.

Verdict

OxyROMon is a strong fit for technically comfortable collectors who want archival-safe exports and database-backed control over a varied ROM collection without paying for the tool. Its breadth of validation and organization workflows is the main reason to choose it; look elsewhere if you need metadata scraping, less DAT upkeep, or a more accessible browser-first manager.

	OxyROMon	ROM Librarian
Free plan	Yes	Yes
Free trial	No	No
Paid from	Free	Free
Platforms	api, Linux, macOS, self-hosted, Web, Windows	Linux, Windows
Free plan	Yes
Metadata scraping	No
Hash verification	Yes	Yes
Archive support	advanced	advanced
Supported platforms	Linux, macOS, Windows	Windows, Linux
Duplicate detection		Yes
File renaming		Yes

OxyROMon vs ROM Librarian

OxyROMon

ROM Librarian