eval.bar is a free, open-source chess analysis application that focuses on making engine analysis legible and visually informative. Upload a PGN or paste a game, and the tool generates an interactive evaluation graph alongside move-by-move commentary, highlighting mistakes, inaccuracies, and strong moves with visual cues.

The interface is designed to make it easy to compare engine evaluations across the game and jump to the critical moments where the advantage changed hands. It supports local Stockfish analysis in the browser, meaning no server-side processing is required.

eval.bar is free and open source. It is a good lightweight alternative to game review tools on larger platforms for players who want fast, clean post-game analysis without signing up for a service.