Everyday Online Tools

Everyday Online Tools

High-demand browser tools for passwords, QR codes, percentages, age, BMI, units, loans, dates, time zones, images, colors, encoding, UUIDs, and random generators. These tools complement the China sourcing, SEO, creator, and business tools on Mr Kcal Store.

Not sure where to start?

Use the Best Free Online Tools guide to choose the right calculator, converter, QR code tool, image helper, security utility, SEO tool, or China sourcing template for your task.

Password Generator

Create strong random passwords for website accounts, hosting panels, email, Wi-Fi notes, supplier portals, and everyday security.

Percentage Calculator

Calculate percent of a number, percentage change, discounts, markups, and share of total.

Age Calculator

Calculate exact age from a birth date to today or another target date.

BMI Calculator

Estimate body mass index using height and weight in metric or US units.

Unit Converter

Convert common length, weight, temperature, volume, and area units in one simple browser tool.

Loan Calculator

Estimate monthly payment, total interest, and total repayment for a fixed-rate loan.

Mortgage Calculator

Estimate monthly principal and interest for a simple fixed-rate mortgage.

Compound Interest Calculator

Estimate how a starting amount and regular contributions may grow with compound interest.

Date Calculator

Add or subtract days, weeks, months, or years from a date.

Time Duration Calculator

Calculate the duration between two times, including overnight spans.

Time Zone Converter

Compare a date and time across common time zones for meetings, supplier calls, and travel planning.

Base64 Encoder Decoder

Encode text to Base64 or decode Base64 back to readable text.

UUID Generator

Generate random UUID v4 identifiers for development, testing, databases, and notes.

Lorem Ipsum Generator

Generate placeholder words, sentences, or paragraphs for design mockups and draft layouts.

Color Picker

Pick a color and convert between HEX and RGB values.

Random Number Generator

Generate one or many random numbers from a range.

Calorie Calculator

Estimate daily maintenance calories using age, sex, height, weight, and activity level.

Image Compressor

Compress JPG, PNG, or WebP images in your browser for faster pages and smaller uploads.

Image Resizer

Resize an image by width and height, then download the resized version.

PNG to JPG Converter

Convert PNG images to JPG in your browser and choose a background color for transparent areas.

QR Code Generator

Create a static QR code for a URL or text note, preview it, and download it as a PNG.

Browse by tool type

Use these focused hubs to find the right tool faster and continue the workflow.

All Tools A-Z

Browse the complete Mr Kcal Store tool library in one alphabetical index.

All Free Online Tools A-Z

Find every calculator, generator, converter, sourcing tool, SEO utility, image tool, and guide from one page.