verifydump

Overview

verifydump is a command-line checker for compressed CHD and RVZ disc images matched against Redump Datfiles. It suits emulator users who want to validate preserved collections and are comfortable setting up command-line dependencies. Its narrow focus is useful, but the required conversion tools make it less convenient than a self-contained desktop app.

Key features

Supply a Redump Datfile, zipped or otherwise, followed by compressed dump files or folders. verifydump converts each image to the format described by the Datfile, adjusts it to Redump conventions, and checks the result. That lets users check compressed images without keeping a converted copy as their working file.

CHD verification requires MAME’s chdman and binmerge; RVZ verification requires DolphinTool. The relevant tools must be installed and available in the system PATH, so setup is part of using verifydump, not a one-time optional extra. It says it leaves users’ files unchanged and stops checking an individual dump when it finds an error. For troubleshooting, --verbose provides more detailed output.

Some Redump cue metadata cannot be represented in CHD. Users can supply original cue files with --extra-cue-source, or allow cue mismatches with --allow-cue-file-mismatches. The former helps retain cue context when checking; the latter accepts a mismatch, so it is the wrong choice when exact cue metadata is essential.

Verification creates temporary converted files and deletes them afterward. The project suggests using a RAM drive for frequent checks or large collections to reduce SSD writes. That is a practical consideration for heavy use, while occasional checks do not call for the same storage workaround.

Pricing

verifydump is free: the open-source command-line tool costs nothing. There is no free trial because no paid plan is needed. Its MIT License makes it a straightforward choice for users seeking a no-cost checker, though the price does not remove the effort of installing the format-specific dependencies.

Platforms

verifydump supports Windows, macOS, and Linux. Windows users can use the project’s executable; Linux and macOS users can install through pipx or another Python package installation method. The package requires Python 3.10 or later and below 3.16. The latest release is v1.0.1, with bug fixes and compatibility updates for newer tool versions.

Who it's for

This is best for people who keep compressed disc images for emulator use and want to compare them with Redump preservation data. It is a good fit for technically comfortable users with the relevant conversion utilities already installed, or willing to configure them. Users looking for a graphical library manager or a checker that avoids external tool setup should look elsewhere.

Pros and cons

• Focused verification: checks compressed CHD and RVZ images against Redump Datfiles without requiring users to maintain converted copies.
• Originals remain untouched: the tool says it does not modify user files, reducing risk to the source collection.
• Platform coverage: Windows, macOS, and Linux are supported, with a Windows executable and Python installation routes for the other systems.
• External dependencies: CHD and RVZ each need separate tools on the system PATH, adding setup and maintenance work.
• Temporary conversion writes: checks create and delete temporary files, which can mean extra SSD writes for frequent or large-scale verification.
• Cue metadata caveat: some Redump cue information cannot be represented in CHD, so users may need original cue files or must accept mismatches.

Alternatives

For broader ROM collection workflows, compare ROM Management Software. Igir is another free option for Windows, macOS, Linux, and self-hosted use, with no stated usage or collection-size limit; choose it when those broader platforms and collection flexibility matter more than verifydump’s specific CHD/RVZ-to-Redump check. OxyROMon is free across Linux, macOS, Windows, web, API, and self-hosted platforms, with no paid tiers or stated usage limits, making it worth considering when a wider platform mix is the priority.

RomM is a free-forever option with Android, iOS, web, API, desktop, and self-hosted platforms and no paid features; pick it when that platform breadth matters more than verifydump’s focused verification. ROMSorter is free and MIT-licensed for Linux, macOS, and Windows, though its current release is Win-x64 only. RomForge is a free MIT-licensed desktop app for Linux, macOS, and Windows. ROMie is free to download and use on Linux, macOS, and Windows, with no paid plans stated.

RomVault offers a free plan and is freemium, while ClrMamePro is freeware; consider either as another free option if you are comparing ROM-management tools rather than seeking verifydump’s specific compressed-image check.

Verdict

Choose verifydump if you want a free, cross-platform command-line way to check compressed CHD or RVZ images against Redump and can install the required tools. Its strongest reason to choose it is that it checks the converted data while leaving the compressed originals alone. Look elsewhere if you want a broader collection-management workflow or do not want to manage dependencies and temporary conversion files.