Developer & AI Tools
Free, privacy-focused online utilities for software engineers, fullstack developers, and AI prompt designers. No signup or download required.
Popular & High-Searched Utilities
JSON Formatter & Validator
Prettify, format, validate, and minify JSON strings with real-time error syntax highlighting.
AI Prompt Optimizer & Refiner
Transform basic prompts into structured, few-shot, and chain-of-thought system prompts.
Base64 Encoder & Decoder
Instantly encode plain text to Base64 or decode Base64 back to readable UTF-8 strings.
AI Token Counter & Cost Estimator
Calculate token counts and estimate API inference costs for GPT-4o, Claude 3.5, Gemini 1.5, and Llama 3.
JWT Token Decoder & Inspector
Decode and inspect JSON Web Token (JWT) headers, claims, payload JSON, and expiration dates.
AI Code Explainer & Architecture Reviewer
Analyze complex code snippets to generate step-by-step logic explanations, Big-O complexity, and review notes.
All 100 Tools Directory
JSON Formatter & Validator
Prettify, format, validate, and minify JSON strings with real-time error syntax highlighting.
AI Prompt Optimizer & Refiner
Transform basic prompts into structured, few-shot, and chain-of-thought system prompts.
Base64 Encoder & Decoder
Instantly encode plain text to Base64 or decode Base64 back to readable UTF-8 strings.
AI Token Counter & Cost Estimator
Calculate token counts and estimate API inference costs for GPT-4o, Claude 3.5, Gemini 1.5, and Llama 3.
JWT Token Decoder & Inspector
Decode and inspect JSON Web Token (JWT) headers, claims, payload JSON, and expiration dates.
AI Code Explainer & Architecture Reviewer
Analyze complex code snippets to generate step-by-step logic explanations, Big-O complexity, and review notes.
Regex Tester & Matcher
Test regular expressions against sample text with live capture groups, flags, and match highlights.
AI Regex Generator from Plain English
Describe your text matching pattern in natural language and receive an optimized regular expression.
UUID / GUID Generator (v4 & v7)
Generate cryptographically random UUID v4 and timestamp-ordered UUID v7 strings in bulk.
AI SQL Query Generator from Natural Language
Translate plain English business questions into performant SQL queries with table schema awareness.
URL Encoder & Decoder
Percent-encode and decode URLs and URI query parameters compliant with RFC 3986.
AI Git Commit Message Generator
Generate Conventional Commit messages (`feat:`, `fix:`, `refactor:`) from diffs or change descriptions.
HTML Entity Encoder & Decoder
Convert special characters into HTML entities (&, <, >) and decode entities to characters.
AI Docblock & Function Documentation Generator
Generate standard PHPDoc, JSDoc, and Python docstrings from method signatures and code bodies.
MD5, SHA-256 & Hash Generator
Calculate cryptographic checksums: MD5, SHA-1, SHA-256, and SHA-512 hashes.
AI Fake Data & JSON Payload Generator
Generate realistic fake user profiles, ecommerce orders, and relational JSON arrays for testing.
SQL Query Formatter & Beautifier
Format, indent, and uppercase keywords in MySQL, PostgreSQL, and SQLite queries.
AI Unit Test Case Generator
Generate PHPUnit, Pest, and Jest unit and feature tests with mock assertions and edge cases.
CSS Minifier & Formatter
Compress CSS files to save bandwidth or unminify compressed CSS for editing.
AI Code Refactoring & Modernizer
Suggest modern PHP 8.4 / ES2024 refactoring patterns to improve readability and eliminate code smells.
JavaScript Formatter & Beautifier
Format and beautify obfuscated or compressed JavaScript code blocks.
AI System Prompt Builder & Persona Architect
Build robust system prompts with roles, guardrails, step-by-step reasoning, and strict output formats.
Markdown to HTML Live Previewer
Write Markdown copy with live real-time HTML preview and one-click HTML copy.
AI Text Summarizer & TL;DR Extractor
Condense lengthy technical documentation, meeting notes, and articles into bulleted key takeaways.
Slug & URL Permalink Generator
Convert article titles and strings into SEO-friendly, clean URL slugs with custom delimiters.
AI Cron Schedule Generator from Plain English
Convert plain English sentences into accurate 5-field cron syntax expressions.
HEX, RGB, HSL & CMYK Color Converter
Convert color values between HEX, RGB, RGBA, HSL, HSLA, and CMYK with color previews.
AI Error & Stack Trace Debugger
Paste Laravel, Node, Python, or SQL stack traces to get root-cause analysis and exact code fixes.
Lorem Ipsum Dummy Text Generator
Generate custom paragraphs, sentences, or word counts of Latin dummy placeholder text.
AI SEO Meta Description & Title Generator
Generate high-CTR, character-bounded meta titles and meta descriptions from page summaries.
Unix Timestamp & Date Converter
Convert Unix epoch timestamps (seconds/milliseconds) to human-readable dates and vice-versa.
AI GitHub README & Documentation Generator
Create structured GitHub README files with installation, features, architecture, and badge sections.
Text & Code Diff Comparison Tool
Compare two text blocks side-by-side or inline to highlight additions, deletions, and diffs.
AI Dockerfile & Container Config Generator
Generate multi-stage, production-ready Dockerfiles and docker-compose configurations.
Secure Password & Token Generator
Generate strong, cryptographically secure passwords and API tokens with entropy metrics.
AI OpenAPI / Swagger Spec Generator
Generate OpenAPI 3.0 / Swagger YAML and JSON specifications from route and parameter descriptions.
Bcrypt Hash Generator & Verifier
Generate and verify standard 60-character Bcrypt ($2y$) password hashes.
AI Variable & Function Name Suggester
Generate clean, semantic, and idiomatic naming suggestions for functions, classes, and variables.
Cron Expression Parser & Visualizer
Parse 5-field cron syntax into human-readable schedules with next execution dates.
AI Tailwind CSS Class Suggester
Convert UI design descriptions or raw CSS styles into clean, responsive Tailwind CSS utility classes.
HTML to Markdown Converter
Convert raw HTML markup, tables, and links back into clean GitHub Markdown.
AI Microservice Architecture Planner
Generate microservice domain boundaries, event bus schemas, and database strategies for SaaS products.
XML Formatter & Syntax Validator
Format and validate XML documents, sitemaps, and SOAP payloads with tree indentation.
AI Database Schema & Migration Designer
Design normalized relational database schemas and Laravel migrations from entity descriptions.
YAML to JSON & JSON to YAML Converter
Convert configuration files seamlessly between YAML and JSON formats.
AI Code Converter (Python, PHP, JS, Go)
Translate algorithms, functions, and logic across PHP, Python, JavaScript, TypeScript, and Go.
Number Base Converter (Binary, Octal, Hex, Dec)
Convert numbers across Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hex (Base 16).
AI Few-Shot Prompt Example Generator
Generate high-precision input-output pairs to train prompt completions and prevent hallucinations.
HTTP Status Code Lookup & Guide
Interactive lookup and technical explanation of 1xx, 2xx, 3xx, 4xx, and 5xx HTTP response codes.
AI Code Security & Vulnerability Auditor
Scan code snippets for OWASP Top 10 vulnerabilities (SQL injection, XSS, insecure deserialization).
cURL Command to Code Converter
Convert raw cURL requests into PHP (Guzzle/cURL), JavaScript (Fetch/Axios), and Python.
AI Prompt Injection Guardrail Builder
Create defensive prompt wrapper instructions to prevent jailbreaks and malicious input attacks.
User Agent String Inspector
Parse User-Agent strings to extract browser version, OS, rendering engine, and device type.
AI Release Changelog & Newsletter Drafter
Convert raw commit logs and pull request summaries into user-friendly product release notes.
String Case Converter (Camel, Snake, Kebab)
Convert text and variable names between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.
AI Blog Headline & Hook Generator
Generate high-performing headline variations and opening hooks for tech articles and tutorials.
Word, Character & Byte Counter
Real-time word counter, character count (with/without spaces), paragraphs, bytes, and reading time.
AI Technical Interview Question Generator
Generate seniority-tailored interview questions, coding challenges, and evaluation rubrics.
IP Subnet & CIDR Calculator
Calculate IP address ranges, subnet masks, broadcast IPs, and total usable hosts from CIDR notation.
AI Agile User Story & Acceptance Criteria Builder
Generate Agile user stories with Given-When-Then acceptance criteria from feature descriptions.
QR Code Generator
Generate high-resolution SVG and PNG QR codes for URLs, WiFi credentials, and plain text.
AI Cyclomatic Complexity & Clean Code Analyzer
Analyze cognitive complexity, deep nesting, and recommend early returns and guard clauses.
CSS Box Shadow Visual Designer
Visually design multilayer CSS box-shadows and copy production-ready CSS code.
AI GraphQL Schema & Query Builder
Generate GraphQL types, query resolvers, and mutation schemas from entity definitions.
CSS Gradient Palette Builder
Create smooth linear and radial CSS gradients with multiple color stops and angle controls.
AI Bash & Automation Script Generator
Generate bash deployment scripts, automated database backups, and cron shell utilities.
HTML Meta Tag & OpenGraph Generator
Generate complete SEO meta tags, OpenGraph (Facebook/LinkedIn), and Twitter Card markup.
AI NGINX & Apache Server Config Generator
Generate server block configurations for SSL/TLS, reverse proxies, and gzip compression.
HTML Table to Markdown & JSON Converter
Parse raw HTML `<table>` elements and transform them into Markdown tables and JSON arrays.
AI TypeScript Interface & Type Generator
Generate strict TypeScript interfaces, types, and enums from JSON objects or database models.
SVG Code Minifier & Optimizer
Clean redundant XML namespaces, metadata, and minify SVG vector markup.
AI Markdown Table & Comparison Matrix Builder
Organize unstructured feature lists and metric comparisons into clean Markdown tables.
CSS Flexbox Visual Playground
Interactive CSS flexbox visualizer with justify-content, align-items, and direction controls.
AI Caching Strategy & Performance Advisor
Recommends caching layers (Redis/Memcached), TTL durations, and cache invalidation strategies.
JavaScript Keycode & Event Inspector
Press any key to inspect `event.key`, `event.code`, numeric `keyCode`, and modifier states.
AI Webhook Payload Simulator & Mock Event Creator
Generate realistic webhook JSON payloads for Stripe, GitHub, Shopify, and Slack events.
Duplicate Line Remover & List Sorter
Remove duplicate lines from text lists, sort alphabetically, reverse, and trim whitespace.
AI Transactional Email Template Copywriter
Generate welcome emails, password reset instructions, and subscription renewal copy with variables.
Chmod & Linux Permissions Calculator
Calculate numeric (777, 755, 644) and symbolic (`rwxr-xr-x`) file permissions with checkboxes.
AI Code Comment & PHPDoc Cleaner
Remove obsolete commented-out code blocks and standardize professional inline docstrings.
BEM & CSS Class Formatter
Format and validate Block Element Modifier (BEM) naming conventions for CSS architecture.
AI Web Accessibility (a11y) Evaluator
Evaluate HTML elements for WCAG 2.1 AA compliance, ARIA attributes, and screen reader roles.
JSON Schema Validator & Generator
Generate JSON Schema draft definitions from raw sample JSON and validate data compliance.
AI Semantic SEO Keyword Extractor
Extract high-intent search keywords, LSI terms, and search entities from technical articles.
Hex to ASCII & ASCII to Hex Converter
Convert raw ASCII character text to hexadecimal byte representations and vice-versa.
AI Polyglot Starter Code Generator
Generate starter boilerplate and run commands across PHP, Go, Rust, Python, and TypeScript.
Robots.txt & Sitemap Syntax Checker
Validate search crawler directives in robots.txt and XML sitemap hierarchy syntax.
AI GitHub Actions CI/CD Pipeline Builder
Generate automated `.github/workflows/ci.yml` pipelines for testing, linting, and deployment.
JavaScript & PHP String Obfuscator
Obfuscate sensitive strings into character arrays and hex encoding for safe embedding.
AI Livewire 3 Component Boilerplate Generator
Generate full-stack Livewire 3 component classes with reactive properties, validation, and Blade views.
HTML Favicon Code & Header Generator
Generate complete multi-resolution favicon HTML tags for Apple Touch, Android, and desktop browsers.
AI Localization & i18n Translation Key Generator
Extract hardcoded strings from templates and generate structured translation JSON dictionaries.
URL Parser & Query Parameter Extractor
Deconstruct complex URLs into protocol, host, port, path, and extract query string keys/values.
AI Algorithm Big-O & Complexity Guide
Analyze worst, average, and best-case time and space complexity for algorithms and data structures.
CSS Unit Converter (px to rem, em, %, vh, vw)
Convert pixel (px) values to modern scalable units (rem, em, percentage, viewport units).
AI SaaS Pricing Model & ARPU Calculator
Calculate monthly recurring revenue (MRR), churn impact, and optimal subscription tier pricing.
PHP Array to JSON & JSON to PHP Converter
Convert between PHP associative array syntax (`["key" => "val"]`) and JSON objects.
AI Code De-minifier & Variable Restorer
Unpack minified code bundles and intelligently restore descriptive variable and method names.
Docker Compose to .env Extractor
Parse docker-compose.yml files and extract all declared environment variables into a `.env` template.
AI Prompt Comparison Arena & Benchmarker
Compare two different system prompts side-by-side with dynamic test variables to benchmark quality.