Developer Tools

Free browser-based tools to speed up your development workflow. No signup, fully offline-compatible.

Workflow

ATS Resume Checker

Verify if your resume is optimized for Applicant Tracking Systems by comparing keywords vs a job description.

Utilities

Cron Expression Builder

Visual cron expression builder with a plain-English translation and schedule validator.

Formatting

SQL Query Formatter

Format and beautify messy SQL queries with dialect-specific syntax (PostgreSQL, MySQL, SQLite).

Formatting

Code to Image Converter

Turn code snippets into polished PNG images with themes, line numbers, window chrome, and export controls.

Formatting

JSON Formatter / Validator

Format, validate, minify, sort, and inspect JSON payloads locally in your browser.

Workflow

GitHub README Generator

Generate a beautiful, modern GitHub profile README with markdown badges, stats, and skill icons.

Utilities

Chmod Calculator

Interactive numeric and symbolic Unix permission converter with visual checkboxes.

Utilities

.gitignore Generator

Choose your languages, frameworks, or IDEs to instantly generate a combined .gitignore file.

Workflow

Open Graph Previewer

Enter social meta tags manually or paste HTML to preview cards side-by-side for Twitter, LinkedIn, WhatsApp, etc.

Utilities

Regex Explainer

Paste any regular expression pattern and get a plain-English, line-by-line breakdown of its parts.

Finance

H-1B Salary Benchmarker

Benchmarking tool using USCIS H-1B salary disclosure data to check salary ranges for engineers.

Finance

Freelance Rate Calculator

Calculate your target freelance hourly or project rate based on expenses, target hours, and savings.

Workflow

Tech Stack Questionnaire

Input project type, team size, and timeline to receive a recommended software architecture.

Workflow

Tech Stack Decision Matrix

Evaluate technologies mathematically against criteria that matter to your business to avoid hype-driven development.

Security

Dockerfile Linter

Verify your Dockerfiles against best practices and security rules using a client-side parsing engine.

Utilities

SSH Config Generator

Visual generator for SSH configuration blocks (~/.ssh/config) with proxy jumps and key management.

Workflow

API Status Page Aggregator

Real-time status tracking for major APIs and developer services on a single dashboard.

Formatting

Semver Diff Explainer

Compare two version strings under semantic versioning and see a plain-English diff of the changes.

How it works

Developer Tools guide and FAQ

Developer Tools on Toolplex is a focused collection of browser-based utilities for users who need fast, practical help without installing software or creating an account. The category groups related calculators, generators, validators, formatters, checkers, and reference tools so that common tasks are easy to find from one place. Each page is designed to open quickly, explain its purpose clearly, and keep the actual tool experience visible instead of hiding it behind a landing page.

The tools in this category are built for repeated use across desktop, tablet, and mobile screens. A user may open a tool beside a code editor, during a study session, while reviewing a document, or from a phone when they only need a quick calculation or validation. For that reason, Toolplex favors compact controls, readable results, responsive grids, and privacy notes that explain how the page handles input. Whenever possible, the work happens locally in the browser.

This category page is also designed as a navigation and discovery surface. The descriptions help users understand which tool matches their task before opening it. As the product improves, each tool will receive stronger validation, better examples, clearer assumptions, FAQ sections, and deeper explanatory content. The goal is to make the category useful both for people who know exactly what they need and for people who are comparing related tools.

Toolplex tools are productivity helpers, not replacements for professional judgment. Developer and security tools should be tested in the target environment. Finance, medical, education, business, and legal tools should be verified against official sources where the result matters. The category structure, explanatory text, and FAQs are meant to make those boundaries clear while still giving users a quick and useful starting point.