Developer Tools Collection
Essential tools for developers, programmers, and webmasters. All tools work directly in your browser with no server-side processing. From code formatters to speed tests, we've got you covered.
Formatters
Format and beautify code for better readability and debugging.
JSON Formatter
Format, validate, minify, and beautify JSON with syntax highlighting and error detection.
HTML Formatter
Format, prettify, and beautify HTML code with proper indentation and validation.
SQL Formatter
Format, beautify, and prettify SQL queries with proper indentation and keyword capitalization.
Calculators & Math Tools
Solve everyday math problems from basic arithmetic to loan calculations.
Calculator
Basic, Scientific, Unit Converter, Loan Calculator, and BMI Calculator. Free online math solver.
PopularTip Calculator
Calculate restaurant tips, split bills among friends. Custom tip percentages and tax exclusion. Free online tip calculator.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule for any loan. Free mortgage and loan calculator.
BMI Calculator
Calculate Body Mass Index with health category classification. Supports metric and imperial units.
Encoders & Decoders
Encode and decode data for safe transmission and storage.
Base64 Encoder
Encode and decode Base64 strings. Supports standard and URL-safe variants.
URL Encoder
Encode and decode URLs for safe transmission. Handles special characters.
Generators
Generate hashes, identifiers, QR codes, and expressions for development tasks.
QR Code Generator
Create QR codes for URLs, text, WiFi, email, SMS, vCards. Download as PNG.
Password Generator
Generate strong passwords with NIST compliance checking and entropy analysis.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 checksums instantly.
UUID Generator
Generate UUID v1, v4, and v7 identifiers. Bulk generation supported.
Cron Generator
Create and validate cron expressions. See next execution times.
Converters
Convert between different formats, timestamps, and representations.
Timestamp Converter
Convert between Unix timestamps and human-readable dates. Shows current time.
Color Picker
Convert between HEX, RGB, and HSL color formats with live preview.
Word Counter
Count words, characters, sentences with readability scores and keyword density analysis.
Time Zone Converter
Convert time between cities worldwide. See current time in multiple locations instantly.
Unit Converter
Convert between 100+ units across 10 categories. Length, weight, temperature, volume, speed - exact calculations.
NewImage Compressor
Reduce image file size without losing quality. JPG, PNG, WebP support. Privacy-first client-side processing.
Image Resizer
Resize images to exact dimensions for social media and web. No upload - privacy-first browser processing.
NewAI-Powered Tools
Smart tools powered by AI that understand context and nuance.
Grammar Checker
AI grammar checker that explains why errors are wrong. Learn grammar rules, not just corrections.
Math Solver
AI-powered math solver. Enter any equation and get step-by-step solutions.
Text to Speech
Free text to speech with browser voices & AI voices. English and Chinese. No signup required.
NewNetwork & Internet Tools
Speed tests, IP lookup, and network utilities for developers.
Speed Test
Free internet speed test. Check your download speed, upload speed, and latency instantly in your browser.
NewIP Address Lookup
Find your public IP, geolocation, ISP info. Verify VPN and check network settings.
DNS Lookup & WHOIS
Query DNS records (A, AAAA, MX, NS, SOA) and domain registration info. AI cannot do this.
NewSSL Certificate Checker
Scan any website for TLS security, certificate validity, and vulnerabilities. Get grade A+ to F. AI cannot test real SSL.
NewFinance Tools
Real-time financial data tools that AI chatbots cannot provide. Live prices, conversion, and market data.
Crypto Price Tracker
Live cryptocurrency prices for 17,000+ coins. 7-day charts, trending coins, market rankings, and instant conversion. AI cannot show live prices.
NewWeather Forecast
Free weather forecast tool. 7-day forecast, hourly details, sunrise/sunset times. AI cannot show real-time weather.
NewCurrency Converter
Convert between 166+ world currencies with live exchange rates. Free online currency calculator.
Document & File Tools
Process, convert, and manipulate PDF files - all in your browser.
PDF Merger
Merge multiple PDF files into one. Privacy-first client-side processing.
PDF Splitter
Split PDF pages or extract page ranges. No upload - privacy-first browser processing.
NewCode Testing
Test and decode tokens, patterns, and expressions.
Regex Tester
Test regular expressions with real-time matching and capture group display.
JWT Decoder
Decode and verify JSON Web Tokens. Inspect claims, validate format.
YAML Validator
Validate and format YAML syntax with error detection and line-by-line highlighting.
Online Timer & Stopwatch
Pomodoro, Interval Timer, Countdown, Stopwatch. AI cannot replace real-time timing for work and fitness.
NewWhy DevTools Hub?
Privacy First
All processing happens in your browser. No data is sent to any server. Your code never leaves your device.
Always Free
No signup, no limits, no premium tier. Every tool is completely free forever.
Fast & Reliable
Powered by Cloudflare's global CDN. Your tools load instantly from anywhere in the world.
Problem Solvers
From "What is my IP?" to "How fast is my internet?" - we solve real problems developers face daily.