Free Developer & Network Tools
35 free browser-based developer utilities — zero tracking, zero server logging, no sign-up required.
Security(4)
JWT Decoder
Decode JSON Web Tokens securely in your browser with header/payload highlighting and expiration check.
Hash Generator
SHA-256, SHA-512, and SHA-1 cryptographic hashing using browser SubtleCrypto API.
Password Generator
Cryptographic high-entropy passwords, API tokens, and secure passphrases.
Password Strength Checker
Test password security privately. Calculates entropy bits, estimated crack time, and weakness flags.
Networking(2)
Subnet & CIDR Calculator
Calculate IPv4 subnet masks, CIDR notation, network address, broadcast address, and host ranges.
What is My IP?
Find your public IP address, ISP details, geographic location, and user-agent string.
Developer Tools(5)
cURL to Code Converter
Convert cURL commands to Python Requests, JavaScript Fetch, Axios, Go, and PHP code.
REST API Tester
Lightweight, browser-based HTTP client. Send GET, POST, PUT, DELETE requests and inspect JSON responses.
Regex Tester & Explainer
Test, debug, and break down Regular Expressions (Regex) in real-time with regex match highlighting.
Error Analyzer
Paste an error message and get a deterministic diagnosis with likely causes and next steps. No AI, nothing sent to a server.
HTTP Status Codes Directory
Searchable dictionary of HTTP status codes (1xx - 5xx) with troubleshooting guides and RFC standards.
DevOps(2)
Formatters(4)
JSON Formatter & Validator
Beautify, validate, format, sort keys, and minify JSON strings with real-time error syntax markers.
SQL Formatter
Format and indent messy SQL queries across PostgreSQL, MySQL, SQLite, and Transact-SQL.
YAML ↔ JSON Converter
Convert configuration files seamlessly between YAML and JSON with instant syntax validation.
SVG to React JSX / TSX
Clean inline SVG code and convert to React JSX, TypeScript TSX, or Vue 3 components.
Encoding(2)
Generators(2)
Calculators(6)
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates, local time, and UTC standard.
Color Converter
Convert colors instantly between HEX, RGB, HSL, and CMYK format strings for web styling.
Scientific Calculator
Browser-based calculator supporting trigonometric functions, logarithms, powers, and roots.
Age Calculator
Calculate exact age in years, months, and days from any birth date, plus total days lived and days to your next birthday.
Percentage Calculator
Find what percent X is of Y, calculate percentage increase/decrease, or find a value from a percentage.
Unit Converter
Convert length, weight, temperature, and digital storage units (bytes to GB/TB) instantly.
Productivity(1)
Text Tools(3)
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time in real-time.
Text Case Converter
Convert text strings to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and Kebab-Case.
Text Diff Checker
Compare two text files or code snippets to highlight line-by-line additions, deletions, and changes.
SEO Tools(4)
Meta Tag Generator
Generate optimized HTML meta tags for Google Search, Facebook Open Graph, and Twitter Cards.
Robots.txt Generator
Build valid robots.txt files to manage search engine crawler access and allow/block specific bots.
XML Sitemap Generator
Generate structured XML sitemaps ready for Google Search Console submission.
Schema Markup Generator
Generate valid JSON-LD schema markup for Articles, FAQs, Organizations, and Products.
No matching tools found
Try searching with a different term like "ip", "json", "hash", or "regex".