Choose your race
Practice solo or challenge another developer in a live match.
CodeRacer — real-time algorithm racesThink fast.Code faster.
Go head-to-head on algorithm challenges, submit before your opponent, and turn every match into measurable progress.
Free to playInstant judging3 languages
Live synchronization
See the race unfold as it happens
Isolated evaluation
Run every solution against judge cases
Competitive rating
Track progress with every ranked match
How it works
From ready to ranked in three moves.
Pick your difficulty, enter the arena, and submit a passing solution before the other racer. No setup, no ceremony—just code.
Solve under pressure
Write in JavaScript, Python, or Go while the clock keeps moving.
Claim the finish
Pass every judge case first and watch your competitive record grow.
Everything you need to race better.
Focused tools for fast feedback, fair competition, and consistent practice.
Real-time racing
See your opponent progress live while every second raises the stakes.
Focused challenges
Practice algorithm and data-structure problems across three difficulty levels.
Competitive ladder
Turn ranked wins into rating gains and track your place on the leaderboard.
Open source
Inspect the codebase, suggest an improvement, or help build the next feature.
Fast feedback
Run against judge cases and get clear results without leaving the arena.
Your language, your pace
Solve every challenge in JavaScript, Python, or Go with tailored starter code.
Built in public
Always moving forward.
CodeRacer is open source and actively evolving. Follow the latest improvements or help shape the next release.
Explore the repositoryRecent Updatesrecent 5 commits
Your next rival is waiting.
Join the arena, choose a challenge, and find out how fast you really think.
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