Text Tools
13
Word Counter
Count words, characters, sentences, paragraphs and estimate reading time.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, and more.
Remove Duplicate Lines
Remove duplicate lines from text with options to sort and trim whitespace.
Lorem Ipsum Generator
Generate placeholder lorem ipsum text — paragraphs, words, or sentences.
Text Diff
Compare two text blocks and highlight added, removed, and unchanged lines.
Character Counter
Count characters with limit presets for Twitter, SMS, meta tags, and more.
Speech to Text
Speak into your microphone and see words transcribed instantly. Browser-based.
Text to Binary
Encode text as binary (0s and 1s) or decode binary back to text.
Diff Checker
Advanced two-column text diff with LCS-based comparison and color highlights.
Text Summarizer
Automatic extractive text summarizer — picks the key sentences from any text.
Reading Level Analyzer
Calculate Flesch-Kincaid readability score and grade level for any text.
Slug Generator
Convert any text to a clean URL-friendly slug with custom separator and case.
HTML Entity Encoder
Encode or decode HTML entities (named, decimal, or hex) instantly.
Converters
13
Unit Converter
Convert length, weight, temperature, area, and speed between units instantly.
Color Converter
Convert between HEX, RGB, HSL, and HSV color formats with live preview.
Base64 Encoder/Decoder
Encode or decode Base64 strings and files instantly.
JSON Formatter
Validate, format, and minify JSON with syntax highlighting.
Currency Converter
Convert between 37 currencies with up-to-date exchange rates.
Timestamp Converter
Convert Unix timestamps to readable dates and vice versa.
CSV ↔ JSON Converter
Convert between CSV and JSON formats instantly.
JSON to CSV
Convert a JSON array to a downloadable CSV file with custom delimiters.
URL Parser
Break any URL into components: protocol, host, path, query params, and hash.
Number Formatter
Format numbers with commas, decimals, and currency symbols for any locale.
Currency Converter (Offline)
Convert 30+ currencies using built-in static reference rates. Works offline.
HTML to Markdown
Convert HTML to clean Markdown syntax instantly in your browser.
Markdown to HTML
Convert Markdown to HTML with a live rendered preview. Powered by Marked.js.
PDF Tools
5
Image Tools
8
Compress Image
Compress PNG and JPEG images to reduce file size.
Resize Image
Resize images to any dimensions with aspect ratio lock.
Convert Image
Convert images between PNG, JPG, and WebP formats.
Crop Image
Crop images with a drag-to-select tool — precise and instant.
Image Flipper
Flip images horizontally or vertically in one click. Download as PNG or JPG.
Image Rotator
Rotate images by 90°, 180°, or any custom angle. Download as PNG or JPG.
Base64 to Image
Decode a base64 string to a viewable image. Supports all image types.
Image Metadata Viewer
View image dimensions, file size, type, aspect ratio, and megapixels.
Dev Tools
15
QR Code Generator
Generate QR codes from any URL or text. Download as PNG.
Password Generator
Generate strong random passwords with custom length and character sets.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.
Regex Tester
Test regular expressions with live match highlighting and group details.
UUID Generator
Generate v4 UUIDs in bulk with format options.
Markdown Preview
Write Markdown and see a live rendered HTML preview side by side.
URL Encoder / Decoder
Encode or decode URL strings instantly.
Random Number Generator
Generate random numbers with custom range, count, and format options.
JWT Decoder
Decode JWT tokens and inspect header, payload, and expiry. Client-side only.
Cron Expression Builder
Build or explain cron expressions visually with plain-English descriptions.
Meta Tag Generator
Generate complete SEO meta tags including OG and Twitter cards.
Open Graph Tag Generator
Generate OG tags with a live social media card preview.
Robots.txt Generator
Generate robots.txt files with common rules for crawlers and AI bots.
.htaccess Generator
Generate Apache .htaccess rules for redirects, HTTPS, caching, and security.
SVG Viewer
Paste SVG code and see the rendered preview. Download as SVG or PNG.
JSON Diff
Compare two JSON objects and see added, removed, and changed keys highlighted.
DNS Lookup
Query DNS records (A, MX, TXT, NS, CNAME) for any domain via Cloudflare API.
HTTP Status Codes
Searchable reference of all HTTP status codes with descriptions and use cases.
Color Scheme Generator
Generate complementary, triadic, and analogous palettes from any hex color.
CSS Animation Builder
Visual CSS keyframe animation builder with presets and live preview.
Table Generator
Paste CSV or fill a grid to export as HTML table, Markdown, or JSON.
Barcode Generator
Generate Code128, EAN, UPC, and more barcodes as SVG or PNG.
JSON ↔ YAML Converter
Convert between JSON and YAML formats in both directions.
CSS Variables Builder
Define CSS custom properties visually and copy the :root{} block.
Image Compressor
Compare image compression at different quality levels with file size stats.
API Response Formatter
Prettify, format, and search raw JSON or XML API responses.
Git Cheatsheet
Interactive searchable Git command reference with examples and categories.
Calculators
9
BMI Calculator
Calculate your Body Mass Index with metric and imperial support.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Percentage Calculator
Calculate percentages, percentage of a value, and percentage change.
Text Repeater
Repeat any text a custom number of times with separator options.
Image Color Picker
Click anywhere on an image to pick and copy the exact color.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule.
Tip Calculator
Calculate tips and split bills between any number of people.
Scientific Calculator
Full scientific calculator with trig, logarithms, memory, and history.
Number to Words
Convert numbers to words in English — cardinal, ordinal, and currency.
Creative
8
Color Palette Generator
Generate harmonious color palettes — complementary, analogous, triadic, and more.
Favicon Generator
Create favicons from text or emoji — download as ICO or PNG.
Morse Code Translator
Translate text to Morse code and back, with audio playback.
Text to Speech
Convert text to speech with voice, rate, and pitch controls.
Pomodoro Timer
Boost productivity with the Pomodoro technique — work, break, repeat.
Random Quote Generator
Get random inspirational quotes. 100+ built-in quotes, works offline.
Typing Speed Test
Test your WPM and accuracy with a 1, 2, or 3 minute typing test.
Font Pair Preview
Preview Google Fonts combinations for headings and body text.
Code Tools
10
SQL Formatter
Format, beautify, and minify SQL queries with syntax highlighting.
HTML Formatter
Format, beautify, minify, and validate HTML with syntax highlighting.
Binary Converter
Convert between decimal, binary, hexadecimal, and octal instantly.
Image to Base64
Convert images to Base64 strings or data URIs, and decode back.
XML Formatter
Format, validate, and minify XML with syntax highlighting.
CSS Minifier
Minify and beautify CSS with size reduction stats.
JS Minifier
Minify JavaScript to reduce file size.
Roman Numeral Converter
Convert numbers to Roman numerals and back.
Whitespace Cleaner
Remove extra spaces, empty lines, and clean up messy text.
EXIF Viewer
View hidden metadata from photos — camera, date, GPS location.
Utilities
17
Stopwatch & Timer
Stopwatch with lap times and countdown timer with alarm.
Word Frequency Counter
Analyze text and find the most frequently used words.
ASCII Art Generator
Convert text to ASCII art with 8 different font styles.
IP Lookup
Find location, ISP, and details for any IP address.
Screen Resolution Checker
Check your screen size, viewport, browser, and device info.
Aspect Ratio Calculator
Calculate and convert aspect ratios for any dimensions.
CSS Gradient Generator
Create beautiful CSS gradients visually and copy the code.
Box Shadow Generator
Generate CSS box shadows visually with live preview and presets.
Color Blindness Simulator
See how images look to people with different types of color blindness.
Pixel Art Creator
Draw pixel art on a grid with fill, erase, and undo tools.
Color Contrast Checker
Check WCAG color contrast ratios (AA/AAA) for web accessibility.
Color Mixer
Mix two colors together and get the resulting hex, RGB, and HSL values.
Gradient Generator
Build CSS linear, radial, and conic gradients visually with color stops.
Border Radius Generator
Design custom CSS rounded corners visually with live preview.
Flexbox Playground
Explore CSS flexbox properties visually and copy the generated CSS.
Password Strength Checker
Test password strength with detailed analysis and suggestions. Client-side only.
Screen Color Picker
Pick any color from your screen using the EyeDropper API. Chrome/Edge only.
Time & World
3
Finance & Business
10
Invoice Generator
Create professional printable invoices with client details and line items.
Compound Interest
Calculate investment growth with compound interest and a year-by-year chart.
VAT Calculator
Add or remove VAT at configurable rates with EU country quick presets.
ROI Calculator
Calculate return on investment percentage and annualized CAGR.
Break-Even Calculator
Find how many units you need to sell to cover your costs.
Budget Planner
Track monthly income and expenses with a pie chart. Auto-saved locally.
Discount Calculator
Calculate sale price, savings, and find what discount was applied.
Salary Calculator
Estimate net take-home pay after tax with hourly/daily/monthly breakdown.
Markup Calculator
Calculate selling price and profit margin from cost and markup percentage.
Currency Converter (Offline)
Convert between 16 major currencies. Works offline with indicative rates.
Health & Fitness
8
Macro Calculator
Get daily calorie and protein/carb/fat targets based on your goals.
Water Intake Calculator
Find your optimal daily water intake based on weight and activity level.
Sleep Calculator
Find optimal sleep/wake times based on 90-minute sleep cycles.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Heart Rate Zones
Calculate 5 training zones using the Karvonen formula for your age.
Ideal Weight Calculator
Find your ideal weight range using Hamwi, Devine, and BMI methods.
Calories Burned
Estimate calories burned during 30+ activities using MET values.
Pregnancy Calculator
Find your due date, trimester, weeks along and key pregnancy milestones.
Design Tools
8
Neumorphism Generator
Create neumorphic CSS box-shadow effects with live preview and code.
Glassmorphism Generator
Design glass-effect cards with backdrop blur and transparency controls.
CSS Timing Function
Visual cubic-bezier editor to create custom CSS transition easing curves.
Tailwind Colors
Full Tailwind CSS color palette — click to copy hex or class name.
CSS Box Model
Interactive CSS box model visualizer showing content, padding, border, margin.
Shadow Generator
Build multi-layer CSS box-shadow effects with live preview.
Text Gradient
Generate CSS gradient text effects with custom colors and angle.
Button Generator
Design CSS buttons visually with live preview and copy CSS/HTML.
Productivity
7
Email Signature Generator
Create a professional HTML email signature and copy to clipboard.
Resume Builder
Build a professional resume online and download as printable HTML.
Meeting Notes
Structured meeting notes template with agenda, attendees, and action items.
Checklist Maker
Create and manage checklists with local save and markdown export.
Pomodoro Pro
Enhanced Pomodoro timer with custom durations, sessions, and sound alerts.
Random Name Generator
Generate realistic names by gender and nationality for testing and mockups.
Placeholder Images
Generate placeholder image URLs from picsum.photos at any size.
Math & Science
5
Statistics Calculator
Mean, median, mode, std dev, variance, and distribution chart from a data set.
Matrix Calculator
Add, subtract, multiply 2×2 and 3×3 matrices. Find determinant, inverse, transpose.
Prime Generator
Generate primes up to N, check primality, and factorize numbers.
Advanced Unit Converter
Convert data, speed, pressure, energy, power, and frequency units.
Number Base Converter
Live convert between decimal, binary, hex, octal, and any base 2–36.
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ToolHub is a free collection of 100+ online utilities covering text processing, unit conversions, PDF tools, image editing, calculators, code formatters, developer tools, CSS generators, and more. Whether you need to count words, compress a PDF, decode a JWT, check password strength, or generate robots.txt — every tool is instant and completely free. No account needed, no limits, no cost.