Cheat sheets

Quick references you will come back to: HTTP status codes in plain English, a guide to cron symbols, fixes for common cron errors and a library of ready-made schedules for every dialect.

Where it is used: Used when you only need to remember one thing: a port, an HTTP status, a Git undo, a cron symbol, an exception. Searchable and short.

Cheat sheets on BackendBench: Ports cheat sheet (databases, kafka, kubernetes and more); Git cheat sheet by task (undo, rebase, stash, recover); Java exceptions reference (40 exceptions: causes, fixes, examples); Regex: Java vs JavaScript (syntax differences that break patterns); Java 8 to 25 features (what each release added, lts marked); HTTP status codes (searchable, plain-english reference); Cron symbols guide (?, l, w, # and / explained); Cron error fixes (paste the error, find the fix); Schedule library (every common schedule, every dialect). Each one is free, needs no sign-up and runs entirely in your browser, so nothing you enter is uploaded.

Java and HTTP (4)Ops and Git (2)Cron references (3)

Java and HTTP

Exceptions, versions, regex and status codes.

🚨Java exceptions reference40 exceptions: causes, fixes, examples

📅Java 8 to 25 featuresWhat each release added, LTS marked

🔣Regex: Java vs JavaScriptSyntax differences that break patterns

🌐HTTP status codesSearchable, plain-English reference

Ops and Git

Ports and Git undo recipes.

🔌Ports cheat sheetDatabases, Kafka, Kubernetes and more

🌿Git cheat sheet by taskUndo, rebase, stash, recover

Cron references

Symbols, error fixes and ready-made schedules.

📖Cron symbols guide?, L, W, # and / explained

🛠️Cron error fixesPaste the error, find the fix

📚Schedule libraryEvery common schedule, every dialect

Other categories

⏰ Cron & scheduling ☕ Java developer 🗂️ JSON, YAML, XML, CSV & SQL 🧰 Encoders & dev utilities 🚢 DevOps & Kubernetes 🎛️ Frontend & CSS 🔐 Security & IDs 📝 Text tools 🕰️ Date & time 🎨 Color & design 🎯 Play