100+ Free Online Tools
You Should Bookmark
The ultimate collection of free, fast, and private online tools for developers, designers, writers, and everyone. No sign-up. No data collection. Everything runs in your browser.
Every Tool You Need, Organized
Browse 106+ tools across 10 categories. Click any tool to start using it instantly.
Developer Tools(24 tools)
JSON Formatter
Format, validate, and beautify JSON data instantly
Base64 Encoder/Decoder
Encode and decode Base64 strings easily
UUID Generator
Generate random UUIDs (v4) instantly
Password Generator
Generate strong, secure random passwords
JWT Decoder
Decode and inspect JSON Web Tokens
URL Encoder/Decoder
Encode and decode URL strings
HTML Entity Encoder
Encode and decode HTML entities
Regex Tester
Test and debug regular expressions in real-time
CSS Minifier
Minify CSS code to reduce file size
JavaScript Minifier
Minify JavaScript code for production
HTML Minifier
Minify HTML code to reduce page size
SQL Formatter
Format and beautify SQL queries
XML Formatter
Format and validate XML documents
YAML to JSON
Convert between YAML and JSON formats
Timestamp Converter
Convert Unix timestamps to human-readable dates
Cron Expression Generator
Generate and validate cron expressions
Markdown Preview
Write and preview Markdown in real-time
HTML to Markdown
Convert HTML code to Markdown format
Slug Generator
Generate URL-friendly slugs from text
Lorem Ipsum Generator
Generate placeholder text for designs
Text Diff Checker
Compare two texts and find differences
JSON to CSV
Convert JSON data to CSV format
CSV to JSON
Convert CSV data to JSON format
HTTP Status Codes
Quick reference for all HTTP status codes
Text Tools(18 tools)
Word Counter
Count words, characters, sentences, and paragraphs
Case Converter
Convert text between uppercase, lowercase, title case
Text Sorter
Sort lines of text alphabetically or numerically
Remove Duplicate Lines
Remove duplicate lines from text instantly
Text Reverser
Reverse text, words, or lines instantly
Find and Replace
Find and replace text with regex support
Text to Binary
Convert text to binary code and back
Text to ASCII
Convert text to ASCII codes and back
Whitespace Remover
Remove extra whitespace and blank lines
Text Repeater
Repeat text multiple times with separator
Line Counter
Count the number of lines in text
Morse Code Converter
Convert text to Morse code and back
ROT13 Encoder
Encode and decode text with ROT13 cipher
String Length Calculator
Calculate the length of any string
Random String Generator
Generate random strings with custom options
Character Frequency Counter
Count character frequency in text
Number to Words
Convert numbers to written words
Emoji Picker
Search and copy emojis to clipboard
Image Tools(13 tools)
Image Resizer
Resize images to any dimension
Image Compressor
Compress images to reduce file size
Image to Base64
Convert images to Base64 encoded strings
Image Format Converter
Convert images between PNG, JPEG, WebP formats
Image Cropper
Crop images to custom dimensions
Image Rotate & Flip
Rotate and flip images instantly
SVG to PNG Converter
Convert SVG files to PNG images
Favicon Generator
Generate favicons from images or text
Placeholder Image Generator
Generate placeholder images with custom sizes
Image Color Picker
Pick colors from any uploaded image
Image Filters
Apply filters like grayscale, sepia, blur to images
Image Watermark
Add text or image watermarks to photos
Image Background Remover
Remove background from images instantly
PDF Tools(4 tools)
Color Tools(8 tools)
Color Converter
Convert colors between HEX, RGB, HSL formats
Color Palette Generator
Generate beautiful color palettes
CSS Gradient Generator
Create beautiful CSS gradients visually
Color Picker
Pick any color and get all formats
Color Contrast Checker
Check color contrast for accessibility (WCAG)
Random Color Generator
Generate random colors with one click
Color Shades Generator
Generate tints and shades of any color
Tailwind Color Finder
Find the closest Tailwind CSS color
Converter Tools(10 tools)
Length Converter
Convert between meters, feet, inches, miles
Weight Converter
Convert between kg, pounds, ounces, grams
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin
Data Size Converter
Convert between bytes, KB, MB, GB, TB
Number Base Converter
Convert between decimal, binary, hex, octal
Roman Numeral Converter
Convert between Roman and Arabic numerals
Speed Converter
Convert between mph, km/h, knots, m/s
Time Converter
Convert between seconds, minutes, hours, days
Angle Converter
Convert between degrees, radians, gradians
Energy Converter
Convert between joules, calories, BTU, kWh
Math & Calculator(10 tools)
Percentage Calculator
Calculate percentages, increases, and decreases
Discount Calculator
Calculate sale prices and savings
BMI Calculator
Calculate your Body Mass Index
Age Calculator
Calculate exact age from date of birth
Tip Calculator
Calculate tips and split bills easily
Loan Calculator
Calculate monthly payments and interest
Random Number Generator
Generate random numbers in any range
Prime Number Checker
Check if a number is prime
GCD & LCM Calculator
Calculate greatest common divisor and least common multiple
Scientific Calculator
Full-featured scientific calculator
SEO Tools(8 tools)
Meta Tag Generator
Generate SEO meta tags for your website
Open Graph Generator
Generate Open Graph tags for social sharing
Sitemap Generator
Generate XML sitemaps for your website
Robots.txt Generator
Generate robots.txt files for your site
Keyword Density Checker
Analyze keyword density in your content
Google SERP Preview
Preview how your page looks in Google search
Heading Structure Checker
Analyze heading structure of your content
Schema Markup Generator
Generate JSON-LD schema markup
Security Tools(5 tools)
Social Media(6 tools)
Twitter/X Character Counter
Count characters for Twitter/X posts
UTM Link Builder
Build UTM tracking links for campaigns
Hashtag Generator
Generate relevant hashtags for your content
Social Media Preview
Preview how links look on social media
YouTube Thumbnail Preview
Preview your YouTube thumbnails
Social Media Image Resizer
Resize images for all social platforms
Why Developers Choose WebToolsBox
100% Privacy
Every tool processes data in your browser. Nothing is uploaded to any server. Your data stays on your device.
No Sign-Up
No accounts, no emails, no passwords. Just open any tool and start using it immediately.
Lightning Fast
Client-side processing means instant results. No waiting for server responses or file uploads.
Mobile Friendly
Every tool works perfectly on phones, tablets, and desktops. Responsive design for all screen sizes.
Always Free
No premium plans, no feature limits, no trial periods. Every tool is 100% free forever.
Always Updated
New tools added regularly. Existing tools improved based on community feedback.
Frequently Asked Questions
Are all tools on WebToolsBox free?
Yes, all 100+ tools are completely free. No hidden fees, no premium tiers, no credit card required.
Is my data safe when using online tools?
Absolutely. All tools process data entirely in your browser using JavaScript. Your data never leaves your device — nothing is uploaded to any server.
Do I need to create an account?
No. Every tool works instantly without any registration, login, or email verification.
Can I use these tools on my phone?
Yes. All tools are fully responsive and work perfectly on mobile phones, tablets, and desktops.
How often are new tools added?
We add new tools regularly based on community feedback and developer needs. Check back often for the latest additions.
Ready to Boost Your Productivity?
Bookmark WebToolsBox and access 100+ free tools whenever you need them. New tools added every week.
Start Using Free Tools