LCOV Viewer

A browser-based tool for viewing LCOV code coverage reports in an intuitive interface.

TLDR

See online LCOV viewer at kunalshah.github.io/lcov-viewer

LCOV Viewer is mobile friendly but view it on Desktop for the best experience.

What is this?

Tools like Bun and Flutter generate code coverage reports in LCOV format, which is great for machines but difficult for humans to read.

This viewer transforms the LCOV code coverage report into an easy-to-navigate, intuitive visual interface.

With this HTML viewer, LCOV report can be viewed in a Tree View, or a List view.

• In the Tree View, report is organized in a tree format to easily see code coverage by folder(s).

• In the List View, you can sort code coverage by Name, by High to Low Coverage, by Low to High Coverage, and by Total Lines

How to use it

Online (easiest)

Visit kunalshah.github.io/lcov-viewer and upload your LCOV file directly in your browser.

No installation or setup required!

Your code coverage report stays completely in your browser.

Offline

Download index.html or clone this repository and open index.html in your browser or serve through a static file server like nginx.

The entire viewer is contained in a single HTML file, so it works completely offline.

Features

• ✨ No dependencies – Everything runs in your browser
• 🔒 Privacy-friendly – Your coverage data never leaves your machine
• 📦 Self-contained – Just one HTML file
• 🎨 Clean interface – Easy to navigate and understand your coverage

License

This project is free to use for any purpose. No attribution required. Enjoy!