Development Utilities

Everyday developer utilities: cron expression builder, Dockerfile and .gitignore generators, mock data, slug and meta tag tools, Tailwind helpers and more.

38 free tools — no ads, no sign-up, everything runs in your browser.

CHANGELOG Generator

Write a clean, consistent CHANGELOG entry in the Keep a Changelog format from grouped Added, Changed, Deprecated, Removed, Fixed, and Security notes

Chmod Calculator

Calculate Linux file permissions (777, 755 etc) easily.

Credit Card Validator

Validate credit card numbers with the Luhn algorithm and detect the issuing network

Cron Expression Builder

Build and validate cron expressions with visual interface and presets

CSS/JS Minifier

Minify your CSS and JavaScript code to reduce file size.

Database Connection String Builder

Build and URL-encode connection strings for PostgreSQL, MySQL, MongoDB, Redis and SQLite from a simple form — with JDBC and key/value variants

Date Calculator

Calculate the difference between two dates or add/subtract days, weeks, months and years

Docker Compose Builder

Build a valid docker-compose.yml from a visual form — services, images, ports, volumes, environment variables, restart policies and dependencies

Docker Run to Compose Converter

Convert a docker run command into a docker-compose.yml service definition with full flag support

Dockerfile Builder

Visual Dockerfile generator with multi-stage builds, common base images, .dockerignore, and best practices for Node.js, Python, Go, Rust, and more.

Environment Variable Encoder/Decoder

Encode, decode, and format environment variables for secure deployment

Git Commit Message Builder

Build conventional commit messages with type, scope, body, and breaking changes. Follow commitlint standards and generate properly formatted commits.

GitHub Actions YAML Generator

Generate GitHub Actions workflow YAML with triggers, jobs, and steps through a visual form

Gitignore Generator

Build a .gitignore from 55+ official github/gitignore templates — pick your languages, frameworks, editors and OSes and get a deduplicated file.

GZip Compressor

Compress and decompress text with gzip, deflate, or deflate-raw

HTML Editor

Online HTML editor with live preview. Write HTML, CSS, and JavaScript and see the results in real-time.

HTML Minifier

Minify HTML by stripping comments and collapsing whitespace, while preserving pre/code/script/style content

HTML Table Generator

Convert CSV data into a clean, semantic HTML table

Hyperlink Generator

Build HTML <a> tags visually — href, target, rel, accessibility and class attributes

JSON to Go Struct

Convert JSON into Go structs with correct types and JSON struct tags. Handles nested structures and slices for fast Go model scaffolding.

JSON to TypeScript

Convert JSON into TypeScript interfaces instantly. Infers types, handles nested objects and arrays, and generates clean, ready-to-use type definitions.

Lorem Ipsum Generator

Generate placeholder text in multiple styles for design and development

MIME Type Detector

Detect MIME types from file content, extensions, or data URIs. Includes magic number detection, common file signatures, and browser compatibility info.