Code Tools - Formatter / Generator / Config

Online code formatter powered by Prettier. Supports JavaScript, HTML, CSS, SQL formatting and safe minification. Protects string literals from being broken.

Online SQL formatting tool: supports MySQL, PostgreSQL, SQLite, BigQuery dialects. Uppercase/lowercase keywords, configurable indentation. Format or minify SQL statements instantly.

Free online HTML formatter supporting beautify and minify, with adjustable indent size and options to keep comments and blank lines.

Online HTML minification and formatting tool: compress by removing comments and whitespace, or format with proper indentation. Preserves script/style tag contents.

Online CSS minification and formatting tool: compress by removing comments and whitespace, or format with proper layout. Protects string literals.

Free online CSS unit converter supporting px, rem, em, pt, and vw with customizable root font size and viewport width. Processed locally, no uploads.

Online JavaScript minify and format: strip comments, optionally drop console/debugger, compact punctuation; protects strings and regex; shows char/UTF-8 size delta. Runs locally.

Free online JSON to TypeScript interface tool, auto-generate interface and type, supports nested objects and arrays

Free online JSON to Go Struct tool. Auto-generate struct definitions with json tag and omitempty support.

Free online JSON to Java Class tool. Auto-generate POJO classes with getter/setter/Lombok/Jackson annotation support.

Free online Java to JSON converter: paste Java objects or getters/setters and get JSON instantly. Browser-local processing, your code never leaves the machine.

Free online mock data generator with 28 data types, JSON/CSV/TSV/YAML formats, batch generate test data

Generate format-valid synthetic China ID numbers, Unified Social Credit Codes, phones, bank cards, plates, and VINs for QA. Random, checksum-passing, local-only — not for impersonation.

Parse TD1/TD3 machine-readable zones (passports and travel documents): document number, names, birth date, expiry, and per-field check-digit verification. Local-only.

Free online SQL CREATE TABLE statement generator with visual table structure design, supporting MySQL, PostgreSQL, and SQLite.

Free online tool to convert cURL commands to HTTP request code in JavaScript (Fetch/Axios), Python (requests), Java, Go, and more. One-click conversion for quick integration.

Convert HTML to React JSX online. Automatically handles className, htmlFor, camelCase attributes, style objects, events, comments, and self-closing tags. Free, no login, local processing.

Free online Dockerfile generator. Multi-language base images, multi-stage builds, health checks, and COPY instructions. Generate production-ready Dockerfiles instantly.

Convert docker run commands into docker-compose.yml instantly: ports, volumes, env vars, restart policies and networks mapped automatically, with multi-line and --flag=value support. Runs entirely in your browser.

Online XML formatter and minifier: pretty indentation or single-line compression, precise syntax error hints, attribute preservation and escaping. Local processing.

Free online .gitignore generator supporting 20+ languages/frameworks/IDEs. Generate ignore file configurations in one click.

Free online CSS Flexbox generator with visual flex layout property adjustment, real-time preview, and one-click CSS code copying

Free online CSS Grid generator with visual grid layout adjustment, custom row/column gaps, real-time preview, and one-click code copying

Handy Git Cheatsheet for developers: covers basic operations, branch management, remote collaboration, and undo/revert scenarios. Searchable and categorized for quick reference. All local processing.

Handy Docker Cheatsheet for developers: covers image management, container operations, networks and volumes, and Compose. Searchable and categorized for quick reference. All local processing.

Handy Linux Commands Cheatsheet for developers: covers file operations, text processing, process management, and network troubleshooting. Searchable and categorized for quick reference. All local processing.

Online chmod calculator: toggle the rwx permission matrix to get the octal (755), symbolic (rwxr-xr-x) form and the chmod command instantly; or type 755 / rwxr-xr-x to reverse-lookup. Includes setuid/setgid/sticky bits and common permission presets.

Handy SQL Cheatsheet for developers: covers queries, aggregations, joins, subqueries, and window functions. Searchable and categorized for quick reference. All local processing.

Handy Regex Cheatsheet for developers: covers metacharacters, quantifiers, groups, lookarounds, and common patterns. Searchable and categorized for quick reference. All local processing.