Text Tools
Word Counter
Count words, characters, sentences, and paragraphs instantly.
Use tool →Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
Use tool →Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
Use tool →Text Diff Checker
Compare two texts and see the differences highlighted.
Use tool →Find and Replace
Find and replace text with support for regular expressions.
Use tool →Duplicate Line Remover
Remove duplicate lines from text, keeping unique entries only.
Use tool →Line Sorter
Sort lines of text alphabetically, numerically, or by length.
Use tool →Text Cleaner
Remove extra whitespace, blank lines, and clean up messy text.
Use tool →Morse Code Translator
Translate text to Morse code and Morse code back to text.
Use tool →Emoji Picker & Search
Search and copy emojis with one click.
Use tool →Text-to-Speech
Convert text to spoken audio using your browser. Choose voice, speed, and pitch.
Use tool →Developer Tools
JSON Formatter & Validator
Format, validate, and minify JSON with syntax highlighting.
Use tool →Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text.
Use tool →URL Encoder / Decoder
Encode or decode URLs and query strings.
Use tool →HTML Entity Encoder / Decoder
Encode special characters to HTML entities or decode them back.
Use tool →Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.
Use tool →UUID Generator
Generate random UUIDs (v4) in bulk with one click.
Use tool →Regex Tester
Test regular expressions with real-time match highlighting.
Use tool →Markdown Preview
Write Markdown and see a live HTML preview side by side.
Use tool →Color Converter
Convert colors between HEX, RGB, and HSL with a live preview.
Use tool →JWT Decoder
Decode and inspect JSON Web Tokens securely in your browser.
Use tool →JSON to TypeScript
Generate TypeScript interfaces from JSON data automatically.
Use tool →Cron Expression Parser
Parse cron expressions and see the next scheduled run times.
Use tool →JSON Path Finder
Paste JSON and click any value to see its JSONPath.
Use tool →Converters
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Use tool →Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Use tool →CSV to JSON Converter
Convert CSV data to JSON and JSON arrays to CSV format.
Use tool →Unit Converter
Convert between common units of length, weight, temperature, and more.
Use tool →Roman Numeral Converter
Convert between Roman numerals and decimal numbers.
Use tool →Text to Binary Converter
Convert text to binary and binary back to text.
Use tool →Generators
Password Generator
Generate strong, random passwords with customizable options.
Use tool →Slug Generator
Convert any text into a URL-friendly slug.
Use tool →Random Number Generator
Generate random numbers, pick from ranges, and roll dice.
Use tool →Image Resizer
Resize images in your browser. No upload to any server.
Use tool →Typing Speed Test
Test your typing speed and accuracy with a timed typing challenge.
Use tool →QR Code Generator
Generate QR codes from any text or URL instantly.
Use tool →WiFi QR Code Generator
Generate a QR code to share your WiFi password instantly.
Use tool →Favicon Generator
Create a simple favicon from text or emoji. Download as 32x32 PNG.
Use tool →Screen Resolution Checker
Check your screen resolution, viewport size, pixel ratio, and display info.
Use tool →Calculators
Percentage Calculator
Calculate percentages: what is X% of Y, percentage change, and more.
Use tool →Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Use tool →BMI Calculator
Calculate your Body Mass Index and see which category you fall into.
Use tool →Tip Calculator
Calculate tip amount and split the bill between multiple people.
Use tool →Aspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens.
Use tool →Timers
CSS Tools
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor and copy the code.
Use tool →CSS Box Shadow Generator
Create CSS box shadows visually and copy the code.
Use tool →Meta Tag Generator
Generate HTML meta tags for SEO, social media, and more.
Use tool →Color Palette Generator
Generate beautiful, harmonious color palettes with one click.
Use tool →Why DevToolBox?
DevToolBox brings together 51 everyday utilities — text manipulation, developer converters, calculators, timers, and design helpers — in one fast, free place. No accounts, no installs, no limits: open a tool, use it, get on with your work.
Every tool runs 100% in your browser. Your JSON payloads, passwords, images, and texts are processed locally by JavaScript and never uploaded to any server. That makes these tools safe for confidential client work, private documents, and sensitive data — you can even use most of them offline once the page has loaded.
The collection grows based on what people actually need: if a tool is missing, tell us and we will consider building it. Popular starting points include the JSON Formatter, the Password Generator, the Word Counter, and the QR Code Generator. For guides and tips, browse the blog.