Daily Performance Chart Update!

Hi everyone,
I’ve been working on a small, completely free, client-side tool that I think some of you might find useful.
It lets you:
• Find common opponents between 1–4 players
• Daily performance history
• Quickly calculates performance or Common Opponent pool performance
• Filter by rated/unrated, tournament-only, exact date range, etc.
• Export the filtered games as PGN
• Everything runs in the browser and caches locally (gets faster over time)
**Live online version (instant, no download, works on phone/tablet/PC)** https://megamate.github.io/Lichess-Performance-Analyzer/

No login, no tracking, no data leaves your computer.
If anyone feels like supporting future updates there’s a small Ko-fi link at the bottom of the page (no pressure at all).
Would love to hear what you think — especially if anything is missing or could be improved.
Thanks!
— Megamate
This tool is not affiliated with, endorsed by, or sponsored by Lichess.org