Free online tools for developers, designers & everyday users — runs entirely in your browser, no data shared.
Format, validate, and minify JSON data instantly. Beautify messy JSON with proper indentation.
Encode text or files to Base64 and decode Base64 strings back to plain text.
Encode URLs for safe transmission or decode encoded URLs to readable format.
Generate strong, secure, random passwords with custom length and character options.
Count words, characters, sentences, and paragraphs in your text instantly.
Convert colors between HEX, RGB, HSL, and HSV formats instantly.
Generate QR codes for URLs, text, emails, and phone numbers instantly.
Convert any image (PNG, JPG, GIF, SVG, WebP) to a Base64 data URL instantly. Copy and embed directly in HTML or CSS.
Upload an image and click anywhere to pick its exact color. Get HEX, RGB, and HSL values instantly.
Calculate your Body Mass Index instantly. Supports metric and imperial units with healthy range chart.
Calculate your exact age in years, months, and days from your date of birth. Find days to next birthday.
Calculate tip amount and split the bill between friends. Choose tip % and number of people.
Convert length, weight, temperature, area, and volume between all common units instantly.
Calculate percentages, find what % one number is of another, or compute percentage change.
Calculate monthly loan EMI for home, car, or personal loans. See total interest, amortization schedule and breakdown.
Generate random numbers in any range. Includes dice roller, coin flip, and lucky number picker.
Online stopwatch with lap times, countdown timer, and Pomodoro productivity timer. Works instantly in browser.
Format, validate, and minify JSON data instantly. Beautify messy JSON with proper indentation.
Generate unique UUIDs (v4) instantly. Generate single or bulk UUIDs.
Convert Unix timestamps to human-readable dates and vice versa.
Convert numbers between binary, octal, decimal, and hexadecimal bases.
Test and debug regular expressions with live match highlighting.
Generate QR codes for URLs, text, emails, and phone numbers instantly.
Generate Lorem Ipsum placeholder text for your designs and layouts.
Generate a favicon from text or emoji instantly. Download as PNG in multiple sizes for your website.
Generate random numbers in any range. Includes dice roller, coin flip, and lucky number picker.
Calculate your Body Mass Index instantly. Supports metric and imperial units with healthy range chart.
Calculate your exact age in years, months, and days from your date of birth. Find days to next birthday.
Calculate tip amount and split the bill between friends. Choose tip % and number of people.
Calculate percentages, find what % one number is of another, or compute percentage change.
Calculate monthly loan EMI for home, car, or personal loans. See total interest, amortization schedule and breakdown.
Everything you need, nothing you don't
Every tool runs live in your browser. No loading screens, no servers, no waiting.
Your data stays on your device. We never collect, store, or transmit your input.
No paywalls, no account, no limits. Use every tool unlimited times, forever.
Guides & tips to help you get more done
Learn how to format, validate, and beautify JSON data online...
A curated list of the most useful free online developer tools — JSON formatter, CSS minifier, regex tester, text diff, Markdown preview, and more. No signup needed.