Free chess tools
Professional utilities for players, coaches and tournament organizers. Free to use, no account required. Sign in to save your work across devices.
Tournament Manager
Swiss and round-robin pairings, live standings, crosstable and a shareable results page.
- Swiss (Dutch-style) and round-robin pairings
- Buchholz, Sonneborn-Berger and more tie-breaks
- Live shareable results page and CSV export
- Saved to your account or this browser
Rating Toolkit
Elo rating change, performance rating, score planner and a saved rating history.
- FIDE formula with the 400-point cap
- Planner: the score you need to hit a target
- Performance rating from the FIDE table
- Rating history chart saved to your account
PGN Studio
Merge, clean, filter, validate and analyse PGN files, and keep collections in your account.
- Real move validation, errors reported
- Strip comments, clocks, variations and NAGs
- Filter, de-duplicate, sort; export PGN, CSV, FEN list
- Opening and player statistics
Chess Clock
Multi-stage time controls, Fischer, Bronstein, delay and hourglass. Works offline.
- FIDE-style multi-stage controls (e.g. 40/90+30)
- Fischer, Bronstein, delay and hourglass
- Undo, move log, low-time alerts, sound, fullscreen
- Saved presets; works offline
Diagram Studio
Build positions, add arrows and highlights, then export PNG or share a link.
- Drag-and-drop board editor with FEN validation
- Arrows, highlights, flip and board colours
- PNG export up to 2000px, no watermark
- Shareable link and embed code