Free Online Tools
Fast, free, and no signup required. All tools run in your browser — your data never leaves your device.
Developer Tools
Tools for coding, debugging, and data processing
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly. Paste messy JSON and get clean, indented output.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. Fast, free, and runs entirely in your browser.
URL Encoder / Decoder
Encode or decode URLs with percent-encoding. Handles query strings, special characters, and Unicode.
HTML Entities Encoder / Decoder
Encode special characters to HTML entities or decode HTML entities back to text. Essential for web developers.
Regex Tester & Validator
Test and validate regular expressions with real-time matching. Supports flags, groups, and common patterns.
Text Diff Checker
Compare two texts side by side and see the differences highlighted. Perfect for code review and document comparison.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
JWT Decoder
Decode JWT headers and payloads instantly. Inspect JSON Web Tokens in your browser without verifying or uploading the token.
UUID Generator
Generate random UUID v4 values in bulk. Copy lowercase, uppercase, hyphenated, or compact UUIDs.
Cron Expression Parser
Parse cron expressions into human-readable schedules. See next execution times, common examples, and field descriptions.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases. Real-time conversion with copy and validation.
JSON to CSV Converter
Convert JSON arrays and objects to CSV format. Flatten nested structures, choose delimiters, and export tabular data.
Image to Base64
Convert images to Base64 encoded strings. Generate data URIs, CSS background-image, and HTML img src code.
IP Address Lookup
Look up any IP address for geolocation, ISP, timezone, and more. Auto-detect your own IP instantly.
CSV Viewer & Formatter
View, sort, filter, and format CSV data in an interactive table. Auto-detect delimiters and convert to JSON.
Binary Translator
Binary Translator - Paste binary code (01001001) and instantly read the text, or type text to get binary. Supports 8-bit ASCII. No signup, works in your browser.
Text to Hex Converter
Text to Hex Converter - Type or paste any text and get hexadecimal output instantly. Also decodes hex back to text. Free, no signup required.
JSON to YAML Converter
Convert JSON to YAML and YAML to JSON online. Format, validate, and transform between JSON and YAML with customizable indentation.
Markdown to HTML Converter
Convert Markdown to HTML online. Supports headers, bold, italic, links, code blocks, lists, blockquotes, and more.
Screen Resolution Detector
Detect your screen resolution, viewport size, device pixel ratio, color depth, and orientation instantly in your browser.
Designer Tools
Color pickers, placeholder text, and visual utilities
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats. Pick colors with the visual picker or enter values.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words. Customize length for your design mockups.
Black & White Image Converter
Black and White Image Converter - Upload any photo and convert it to black and white instantly. 4 methods: Luminance, Average, Desaturate, Threshold. Download HD result free.
CSS Gradient Generator
Create beautiful CSS gradients visually. Choose linear, radial, or conic types, pick colors, and copy the CSS code instantly.
Image Resizer
Resize images online for free. Set custom dimensions, lock aspect ratio, choose output format, and download instantly. No signup required.
CSS Box Shadow Generator
Visual CSS box-shadow generator with live preview. Create multiple shadow layers with offset, blur, spread, color, and opacity controls.
CSS Border Radius Generator
Visual CSS border-radius generator with live preview. Control each corner individually with presets for common shapes.
Placeholder Image Generator
Generate custom placeholder images with specific dimensions, colors, and text. Supports PNG, JPEG, and SVG formats.
PX to REM Converter
Convert pixels (px) to rem units and vice versa. Adjust root font size, view conversion table, and copy results instantly.
Security Tools
Password generators and security utilities
Text Tools
Count, analyze, and transform text
Word Counter & Character Counter
Count words, characters, sentences, and paragraphs instantly. Perfect for writers, students, and SEO.
Text Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, kebab-case, and URL slugs.
Remove Duplicate Lines
Remove duplicate lines from text while preserving order or sorting results. Fast cleanup for lists, logs, and pasted data.
Slug Generator
Convert titles and phrases into clean URL slugs. Create lowercase hyphenated slugs for blogs, docs, and product pages.
Markdown Previewer
Write Markdown and see the rendered preview in real time. Supports headings, bold, code blocks, tables, links, and more.
Text Reverser
Reverse text in multiple ways: reverse characters, reverse word order, or reverse each word individually.
Whitespace Remover
Remove leading, trailing, and extra whitespace from text. Clean up spaces, tabs, empty lines, and line breaks online.
Sort Lines
Sort lines of text alphabetically, by length, or randomly. Remove duplicates, trim whitespace, and customize sort options.
Line Number Adder
Add line numbers to text online. Customize start number, separator, padding width, and skip empty lines.
Punctuation Remover
Remove punctuation marks from text online. Selectively remove periods, commas, quotes, exclamation marks, and more.
Find and Replace Text
Find and replace text online with support for case-sensitive matching, whole-word matching, and regex patterns.
Text to Speech
Convert text to speech using your browser's built-in voice engine. Choose voices, adjust speed and pitch, play, pause, and stop.
Everyday Tools
QR codes, unit conversions, and daily utilities
Unit Converter
Convert between length, weight, temperature, speed, and data units. Fast, accurate, and easy to use.
QR Code Generator
Generate QR codes for URLs, text, email, phone numbers, and WiFi. Download as PNG or SVG for free.
Schulte Grid — Attention Training
Train your focus and peripheral vision with the classic Schulte Grid. Click numbers 1 to N in ascending order as fast as you can. Multiple grid sizes from 3×3 to 7×7.
Date Difference Calculator
Calculate the number of days, weeks, months, and years between two dates. Useful for schedules, planning, and deadlines.
Age Calculator
Age Calculator - Enter your date of birth and find your exact age in years, months, and days. See total days lived and countdown to your next birthday. Free and instant.
BMI Calculator
BMI Calculator - Enter your height and weight to calculate Body Mass Index instantly. Metric (kg/cm) and imperial (lbs/ft) supported. See if you are underweight, normal, or overweight.
Percentage Calculator
Percentage Calculator - Calculate any percentage, percent change, or percent of a number in seconds. No formula needed. Just enter numbers and get instant results.
Tip Calculator
Tip Calculator - Enter bill amount, pick tip percent, split between friends. Shows tip amount, total, and per-person cost. Fast restaurant tip splitter.
Compound Interest Calculator
Compound Interest Calculator - See how your money grows with compound interest. Add monthly contributions, pick compounding frequency. Free investment planner.
Loan Calculator
Loan Calculator - Calculate monthly payments for any loan: mortgage, auto, or personal. See total interest and amortization. Enter rate, term, and amount to get started.
GPA Calculator
GPA Calculator - Enter your courses, grades, and credits to calculate GPA instantly. Supports weighted courses and custom grade scales (A=4.0).
Discount Calculator
Discount Calculator - Enter price and discount percent to see your savings and final price. Includes optional tax calculation. Perfect for sale shopping.
Fuel Cost Calculator
Fuel Cost Calculator - Plan your road trip fuel budget. Enter distance, MPG, and gas price to see total cost and cost per mile. Supports liters per 100km too.
Speed Converter
Speed Converter - Convert MPH to KM/h, knots, m/s, Mach, and more instantly. Perfect for driving, aviation, or science unit conversion.
Countdown Timer
Countdown Timer - Pick any date and watch a live countdown with days, hours, minutes, seconds. Great for New Year, birthdays, vacations, and deadlines.
Learn More in Our Blog
Detailed guides on JSON, passwords, QR codes, regex, and more.