Syntaxle

Can you tell Rust from Go by a single snippet? Spot the bug before it ships?

Syntaxle is a daily puzzle game for programmers. Every day there's a new code snippet. Guess which language it's written in, or on some days, find the error hiding in it.

DAILY PUZZLE
You get six guesses. After each guess, five clues tell you how close you are:
• Year released (higher or lower)
• Country of origin
• Object-oriented or not
• Static or dynamic typing
• Compiled or interpreted
Over 45 languages, from Assembly and COBOL to Rust, Kotlin and Elixir.

FIND THE ERROR
Some days bring a bug hunt instead. Read the snippet and pick the real error. You only get one try.

CODE QUEST
Work through five themed levels, from Boot Camp to Expert Mode, at your own pace.

SPEED RUN
Name as many languages as you can against the clock and chase your personal best.

LEVEL UP
• Earn XP for every puzzle you solve
• Build streaks for bonus XP, with streak freezes to protect you on busy days
• Unlock achievements and complete daily quests
• Use hints when you're stuck

LEADERBOARDS
Compete on the global, weekly and Speed Run leaderboards, or add friends by username and see who's on top.

MAKE IT YOURS
Light and dark mode, color themes, colorblind mode, sound effects and optional daily reminders.

SHARE YOUR RESULT
Post your emoji grid without spoiling the answer.

SYNTAXLE PRO
A one-time purchase that unlocks:
• +25% XP on everything you earn
• A free first hint on every puzzle
• Exclusive themes: Dracula, Nord, Sunset and Matrix
• Up to 3 streak freezes
• Every puzzle from the last 30 days
• No ads
• A crown on the leaderboard and a gold profile frame

Prefer to just skip the ads? There's a separate No Ads purchase too.

New puzzle every day at midnight UTC. How long can you keep your streak?