EPUB Fixer VS git-sizer

• Fixes EPUB Validation Errors
  The tool is designed to detect and correct common EPUB file errors, such as invalid XML, broken metadata, or malformed structure, which helps ensure the file passes validation by tools like EPUBCheck.
• User-Friendly Interface
  Many EPUB repair tools of this type offer a simple, straightforward interface that allows users without technical expertise to fix their EPUB files without needing to understand XML or EPUB specifications.
• Time-Saving
  Automating error detection and correction saves significant time compared to manually editing EPUB files, which typically requires unzipping the file and editing XML/XHTML code by hand.
• Improves Compatibility
  By fixing structural and formatting issues, the tool can help ensure that EPUB files display correctly across different e-readers and platforms, such as Kindle, Apple Books, and Kobo.
• Accessibility for Non-Developers
  Authors, publishers, and self-publishers without coding knowledge can use the tool to resolve technical issues in their ebooks without hiring a developer.

• Comprehensive Repository Analysis
  git-sizer analyzes many different dimensions of a Git repository including commit count, tree size, blob size, history depth, and reference counts, providing a holistic view of repository health and potential scaling issues.
• Easy to Use
  The tool is simple to run with minimal setup—just execute it within a git repository—and it produces clear, human-readable output that highlights potential problem areas without requiring complex configuration.
• Identifies Performance Bottlenecks
  It helps identify specific issues that could degrade Git performance, such as excessively large blobs, deep history, large trees, or too many references, which is valuable before migrating or scaling repositories.
• Open Source and Maintained by GitHub
  Being an official GitHub project, it benefits from credibility, community trust, and ongoing maintenance, and it is well documented with clear explanations of what each metric means.
• Useful for Pre-Migration Checks
  It's particularly helpful for teams migrating repositories to new platforms or consolidating repos, as it flags potential issues that could cause problems during migration or with hosting providers' limits.

Possible disadvantages

• No Automatic Remediation
  git-sizer only identifies and reports issues but does not offer any built-in tools or automated processes to fix problems like large blobs or excessive history depth—users must use separate tools like BFG Repo-Cleaner or git-filter-repo.
• Output Can Be Overwhelming for Beginners
  While detailed, the output includes many metrics and threshold levels that may be confusing for users unfamiliar with Git internals, requiring some learning curve to fully interpret results.
• Limited to Local Analysis
  The tool analyzes a local clone of the repository, so it requires users to have a full local copy of the repo (or at least enough history) to get accurate results, which can be time-consuming for very large repositories.
• No Real-Time Monitoring
  It functions as a one-time analysis tool rather than providing continuous or real-time monitoring of repository health, requiring manual reruns to track changes over time.
• Command-Line Only Interface
  The tool lacks a graphical user interface, which may be less accessible for users who prefer visual dashboards or are less comfortable with command-line tools.

Tracking EPUB Fixer since Jul 2026.

• how to keep github repos small?

  Also there’s a cool project from GitHub you can use to help understand the size of git’s objects in your git repo https://github.com/github/git-sizer. This might help you determine what the best cloning strategy could be. Source: almost 5 years ago