Developer & DevOps for Teacher

20 developer & devops tools hand-picked for Teacher.

Number Base Converter

Number base converter — binary, octal, decimal, hex, and any base 2-36. Bitwise too.
Batch File Rename Planner

Upload a batch, generate safe new filenames with sequence numbers and case rules, then export a CSV plan.
Chinese Idiom Search

800+ everyday chengyu — pinyin, origin, usage.
Go (Golang) Cheatsheet

Go (Golang) cheat sheet — 100+ idiomatic snippets covering syntax, goroutines, channels, generics, errors, stdlib.
JSONPath / JMESPath Query Tester

JSONPath / JMESPath query tester — paste JSON, write a path, see matched values + matched paths highlighted live.
Markdown Cheat Sheet

Markdown syntax cheat sheet — every rule with live preview side by side, GFM + flavors.
Markdown Link Extractor

Upload Markdown and extract inline links, reference links, images, and bare URLs into a local CSV.
Next.js Cheatsheet

Next.js 15 cheat sheet — App Router, Server Components, Server Actions, dynamic routes, with examples and pitfalls.
Office Document Inspector

Inspect DOCX, XLSX, and PPTX package structure for macros, media, embedded objects, custom XML, and size hotspots.
Python Cheatsheet

Python cheat sheet — 100+ idiomatic Python snippets for string, list, dict, file, async, with real examples.
React Hooks Cheatsheet

React hooks cheat sheet — all 17 built-in hooks (useState / useEffect / useMemo / useTransition / useFormStatus...) with real examples and pitfalls.
Regex Cheatsheet

Interactive regex cheat sheet — quick reference for every flavor (JS, Python, PCRE).
Regex Visualizer

Regex visualizer — see your pattern as a railroad diagram + matching state machine, with capture groups highlighted.
Rust Cheatsheet

Rust cheat sheet — 100+ snippets covering ownership, borrowing, lifetimes, traits, async, error handling.
SQL Cheatsheet

SQL cheat sheet — 100+ statements covering SELECT, JOIN, window functions, indexing, MySQL/PostgreSQL/SQLite differences.
Svelte Cheatsheet

Svelte 5 cheat sheet — runes ($state, $derived, $effect), snippets, props, stores, with Svelte 4 comparison.
Text File Cleaner

Upload a text file and remove BOM, null bytes, trailing spaces, and excessive final blank lines locally.
Text File Line Ending Converter

Upload or paste text and convert CRLF, CR, and LF endings to a consistent LF or CRLF output locally.
TypeScript Cheatsheet

TypeScript cheat sheet — 100+ snippets for types, generics, utility types, narrowing, async patterns.
Vue 3 Cheatsheet

Vue 3 cheat sheet — Composition API, reactivity, components, directives, Pinia, with side-by-side Options API comparison.