Utility Tools - Useful Online Utilities for Everyday Use

ComfortSkillz Tools

Calculate, convert, edit, organize and protect files from one place. Browse practical calculators, PDF tools, image tools, text utilities and document security tools built for common tasks.

58+
Tools available
5
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What are you trying to do?

Start with the task instead of searching through a long list. These shortcuts take you directly to the most useful tool groups.

Calculate materials Rebar, stairs, board feet and volume Work with PDFs Merge, split, compress, crop and more Edit images Resize, compress, convert and clean images Calculate something Health, finance, date, time and measurement tools Clean or protect files Metadata, passwords, redaction and security

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Construction PDF Images Calculators Text & Security
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Try a broader search such as PDF, image, calculator, password or date.

Calculators & Converters

22 tools

Age Calculator

Calculate age precisely from birth date to today or another date.

Percentage Calculator

Solve percentages, changes, increases, decreases and discounts.

Discount Calculator

Calculate sale price, savings, tax after discount and reverse price.

Tip Calculator

Calculate tips, total bills and per-person shares.

Date Calculator

Find date differences and add or subtract calendar and business days.

Time Duration Calculator

Calculate elapsed time, breaks, overnight periods and decimal hours.

Universal Unit Converter

Convert common measurement, temperature, data and energy units.

401(k) Calculator

Estimate retirement savings growth from contributions and assumptions.

AARP Investment Calculator

Model investment growth, contributions and long-term returns.

TDEE Calculator

Estimate daily calorie needs from BMR, activity and lifestyle.

Body Fat Calculator

Estimate body fat percentage using supported measurement methods.

BMI Calculator

Calculate body mass index with adult BMI categories and results.

BMR Calculator

Estimate basal metabolic rate with multiple formula options.

Macro Calculator

Estimate protein, carbohydrates, fats and target calorie intake.

Due Date Calculator

Estimate pregnancy due dates using several dating methods.

Height Calculator for Kids

Estimate adult height using child and parent measurements.

Conception Calculator

Estimate conception timing from period, cycle, due-date or ultrasound data.

Bra Size Calculator

Estimate bra size from band and bust measurements with sizing guidance.

AC BTU Calculator

Estimate air-conditioner capacity from room size and key conditions.

Text, Data & Document Security

7 tools

Advanced Word Counter

Count words, characters, sentences and text statistics.

JSON Formatter & Validator

Format, validate, minify and download JSON data.

Password Generator

Create strong random passwords with flexible character controls.

Image Metadata Remover

Remove embedded image properties before sharing photos.

PDF Metadata Remover

Clean PDF author, creator and other document metadata.

Protect PDF With Password

Password-protect PDF documents before sharing.

PDF Redaction

Apply black redactions to sensitive PDF content.

Find the Right Tool Faster

Search by the problem you are trying to solve. For example, type PDF to view PDF tools, image for image editing and conversion tools, or calculator for calculators and measurement tools.

The directory is organized around common tasks rather than technical file types alone. This makes it easier to move from one related task to the next without returning to the main menu.

Construction and measurement

Need to estimate building materials or dimensions? Use the Stair Calculator, Rebar Calculator, Board Feet Calculator or Volume Calculator. These tools are grouped together so users working on one measurement task can move directly to another.

PDF workflows

The PDF collection covers the most common document jobs, including converting images to PDF, combining files, splitting pages, compressing documents, extracting pages, rotating content, removing metadata, repairing files, OCR, password protection and comparison.

Image workflows

Resize, compress, convert, crop, rotate, watermark, blur, remove backgrounds and clean metadata from common image formats.

Frequently Asked Questions

The tools listed on this hub are provided for direct browser-based use. Individual tools can have different file, browser or processing limits, so check the tool page for details.
Start with the construction and measurement group. Stair, Rebar, Board Feet and Volume calculators address different material and dimensional planning problems.
Yes. Use the search box near the top of the page. Search by a tool name, file type or task such as PDF, JPG, JSON, percentage, password, volume or stairs.
Use the task shortcuts near the top of the page. They organize the tools around common goals such as calculating materials, working with PDFs, editing images or protecting documents.
Many ComfortSkillz file tools process files directly in the browser. Processing behavior differs by tool, so read the privacy and processing information shown on the individual tool page before using a sensitive document.

Looking for a specific tool?

Search above or browse the category that matches your task. New calculators and utilities will continue to be added to the collection.

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ComfortSkillz Tools is a growing collection of calculators, converters, document utilities, image tools and practical browser-based tools.
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