Browser-Based Utility Tools
Practical Tools Hub
Practical browser-based tools plus clear guides that explain the formulas, formats, assumptions, and limitations behind the results. Choose a tool or learn the method.
Find a Tool
Search all 150 Practical Tools Hub utilities by task, topic, or phrase.
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Online Tools
Clear, practical tools with examples, explanations, privacy information, and documented assumptions or limitations where they matter.
Developer and Data Tools
JSON Formatter
Format, validate, beautify, and minify JSON directly in your browser.
Open tool →JSON Diff Checker
Compare two JSON values structurally.
Open tool →JSON Schema Validator
Validate JSON against a documented practical schema subset locally.
Open tool →JSONPath Tester
Test common JSONPath property, index, and wildcard expressions locally.
Open tool →Regex Tester
Test regular expressions against sample text and inspect matching results.
Open tool →CSV to JSON Converter
Convert comma, semicolon, tab, or pipe-delimited data into structured JSON.
Open tool →CSV Splitter
Split CSV rows into smaller chunks locally for easier handling.
Open tool →CSV Merger
Merge two CSV datasets with matching headers in your browser.
Open tool →CSV Validator
Check CSV structure, quoted fields, and row/column consistency locally.
Open tool →JSON to CSV Converter
Convert an array of flat JSON objects into CSV with explicit flattening limitations.
Open tool →XML to JSON Converter
Convert well-formed XML to a documented JSON representation locally.
Open tool →XML Formatter & Validator
Validate and format XML locally.
Open tool →JSON to XML Converter
Convert valid JSON into a documented generic XML representation.
Open tool →YAML to JSON Converter
Convert the supported YAML subset into JSON locally.
Open tool →YAML Formatter & Validator
Validate and format YAML locally.
Open tool →JSON to YAML Converter
Convert valid JSON into conservative readable YAML-style output.
Open tool →UUID Generator
Generate random UUID v4 identifiers locally with the browser Web Crypto API.
Open tool →Password Generator
Generate strong random passwords locally with the browser Web Crypto API.
Open tool →Password Strength Checker
Inspect password structure locally without transmitting the password.
Open tool →Hash Generator
Generate SHA-256, SHA-384, or SHA-512 hexadecimal digests locally.
Open tool →JWT Decoder
Decode JWT header and payload data locally without verifying or executing the token.
Open tool →Subnet Calculator
Calculate IPv4 network, mask, broadcast, address count, and host range from CIDR input.
Open tool →QR Code Generator
Create a QR code from text or a URL with client-side browser generation.
Open tool →SQL Formatter
Pretty-print SQL locally with multiple common dialect options.
Open tool →SQL Minifier
Conservatively remove SQL comments and redundant whitespace without execution.
Open tool →JavaScript Formatter
Format common JavaScript source locally without executing it.
Open tool →JavaScript Minifier
Conservatively reduce JavaScript comments and whitespace without executing source.
Open tool →Markdown to HTML Converter
Convert a practical subset of Markdown into HTML source locally.
Open tool →Markdown Formatter
Normalize and format Markdown text locally for readability.
Open tool →CSS Minifier
Remove CSS comments and redundant whitespace locally.
Open tool →CSS Formatter
Pretty-print CSS locally without executing or requesting external assets.
Open tool →HTML Formatter & Minifier
Format or conservatively minify HTML locally.
Open tool →URL Parser
Parse an absolute URL into protocol, host, path, query, fragment, and more.
Open tool →Slug Generator
Turn a title or phrase into a lowercase URL-friendly slug locally.
Open tool →URL Encoder / Decoder
Encode or decode URL components locally without requesting the URL.
Open tool →Base64 Encoder / Decoder
Encode Unicode text to Base64 or decode Base64 back to text locally.
Open tool →Unix Timestamp Converter
Convert Unix seconds to UTC date/time and back.
Open tool →Number Base Converter
Convert exact nonnegative integers among bases 2 through 36.
Open tool →ASCII Converter
Convert between text and ASCII character codes locally.
Open tool →Student and Education Tools
GPA Calculator
Calculate GPA from course grades and credit hours.
Open tool →Weighted GPA Calculator
Calculate weighted and unweighted GPA using credits, grade points, and course-specific weighting.
Open tool →Final Grade Calculator
Calculate the score needed on a final exam to reach a target course grade.
Open tool →Test Grade Calculator
Convert points earned and possible into a percentage and optional letter grade.
Open tool →Statistics Calculator
Calculate mean, median, mode, range, variance, standard deviation, and quartiles.
Open tool →Confidence Interval Calculator
Calculate two-sided confidence intervals for a mean using t or z critical values.
Open tool →Weighted Average Calculator
Calculate a weighted mean from values and their relative weights.
Open tool →Z Score Calculator
Calculate a standard score from a raw value, mean, and standard deviation.
Open tool →P-Value Calculator
Calculate z or Student t tail probabilities for supported hypothesis-test statistics.
Open tool →Percentage Calculator
Calculate percent-of, ratio percentages, and percentage change with clear formulas.
Open tool →Percent to Fraction Converter
Convert decimal percentages into simplified fractions locally.
Open tool →Scientific Notation Converter
Convert ordinary numbers to E notation and inspect scientific-notation values.
Open tool →Scientific Calculator
Evaluate arithmetic, powers, roots, logarithms, and trigonometric functions.
Open tool →Logarithm Calculator
Calculate logarithms for any valid positive base, plus natural and common logs.
Open tool →Significant Figures Calculator
Count and round significant digits using deterministic decimal rounding.
Open tool →Ratio Calculator
Simplify positive whole-number ratios and see the equivalent decimal value.
Open tool →LCM Calculator
Calculate the least common multiple of two or more positive integers.
Open tool →Combination Calculator
Calculate n choose r combinations for unordered selections.
Open tool →Probability Calculator
Calculate simple probability from favorable and total equally likely outcomes.
Open tool →Permutation Calculator
Calculate ordered selections nPr with exact integer arithmetic.
Open tool →GCD Calculator
Calculate the greatest common divisor of two or more whole numbers.
Open tool →Prime Factorization Calculator
Break a positive integer into prime factors with exponent notation.
Open tool →Proportion Calculator
Solve a simple proportion in the form A/B = C/X with transparent cross multiplication.
Open tool →Fraction Calculator
Add, subtract, multiply, and divide fractions with simplified results and decimal output.
Open tool →Mixed Number Calculator
Convert mixed numbers and improper fractions in either direction.
Open tool →Decimal to Fraction Calculator
Convert a finite decimal into a simplified fraction.
Open tool →Pythagorean Theorem Calculator
Solve a right triangle when any two side lengths are known.
Open tool →Slope Calculator
Calculate the slope between two coordinate points.
Open tool →Midpoint Calculator
Calculate the Cartesian midpoint between two coordinate points.
Open tool →Distance Formula Calculator
Calculate straight-line Cartesian distance between two points.
Open tool →Quadratic Formula Calculator
Solve a quadratic equation with real or complex numeric roots.
Open tool →Citation and Writing Tools
APA Citation Generator
Create basic APA-style reference and in-text citation suggestions.
Open tool →MLA Citation Generator
Create MLA 9 Works Cited entries and in-text citation suggestions.
Open tool →Chicago Citation Generator
Create Chicago 18 Notes and Bibliography or Author-Date citation suggestions.
Open tool →Citation Format Checker
Review common structural patterns in APA 7, MLA 9, and Chicago 18 citations.
Open tool →Character Counter
Count Unicode code points, ordinary-space-excluded characters, and UTF-16 code units locally.
Open tool →Word Counter
Count words, characters, characters without whitespace, and lines using a clear browser-local rule.
Open tool →Word Frequency Counter
Count and rank frequent words in text.
Open tool →Text Cleaner
Trim line edges, collapse repeated spaces or tabs, and optionally remove blank lines.
Open tool →Remove Duplicate Lines
Remove duplicate lines while preserving first occurrence.
Open tool →Sort Lines Alphabetically
Sort pasted lines ascending or descending.
Open tool →Line Counter
Count total, non-empty, and blank logical lines in pasted text.
Open tool →Text Diff Checker
Compare text blocks line by line.
Open tool →Reverse Text
Reverse text by Unicode code point locally.
Open tool →Reading Time Calculator
Estimate reading time from word count and an adjustable reading speed.
Open tool →Sentence Counter
Estimate sentence count with a transparent punctuation-based rule.
Open tool →Paragraph Counter
Count plain-text paragraph blocks using a transparent blank-line rule.
Open tool →Reading Level Calculator
Estimate Flesch Reading Ease and Flesch-Kincaid Grade Level with disclosed heuristics.
Open tool →Lorem Ipsum Generator
Generate predictable placeholder paragraphs for layout and interface testing.
Open tool →Case Converter
Convert text to uppercase, lowercase, simple title case, or sentence case.
Open tool →Finance and Money Tools
Inflation Calculator
Compare purchasing power over time using CPI-based inflation adjustment.
Open tool →Compound Interest Calculator
Estimate future value, total contributions, and interest earned over time.
Open tool →Investment Growth Calculator
Project hypothetical future value from an initial balance, monthly contributions, return assumption, and time horizon.
Open tool →Mortgage Payment Calculator
Estimate principal-and-interest payments from user-entered loan assumptions.
Open tool →Amortization Schedule Calculator
Build a fixed-rate principal-and-interest schedule with total interest and balance progression.
Open tool →Loan Payment Calculator
Estimate payments, total paid, and total interest for a fixed-rate amortizing loan.
Open tool →Interest Rate Calculator
Estimate the nominal APR implied by principal, fixed monthly payment, and term.
Open tool →Auto Loan Calculator
Estimate amount financed, monthly payment, and total interest from vehicle financing assumptions.
Open tool →Hourly to Salary Calculator
Convert hourly pay to gross weekly, monthly, and annual equivalents using your schedule assumptions.
Open tool →Pay Raise Calculator
Calculate a pay increase and new gross pay from a raise percentage.
Open tool →Tip Calculator
Calculate tip, total bill, and an equal per-person split from the values you enter.
Open tool →Rent Split Calculator
Split rent equally or by percentage shares among roommates.
Open tool →Bill Split Calculator
Split subtotal, tax, and tip equally among one or more people.
Open tool →Sales Tax Calculator
Calculate tax and total from a subtotal and a tax rate you enter.
Open tool →VAT Calculator
Add or extract VAT using a rate that you provide.
Open tool →Discount Calculator
Calculate savings, sale price, and quantity total from a percentage discount.
Open tool →Unit Price Calculator
Calculate and compare package cost per unit.
Open tool →Profit Margin Calculator
Calculate profit, margin, and markup from selling price and cost.
Open tool →Profit Calculator
Calculate revenue, cost, profit, and profit margin from price, cost, and quantity.
Open tool →Break-Even Calculator
Estimate break-even units and revenue from fixed and variable cost assumptions.
Open tool →ROI Calculator
Calculate gain or loss and simple return on investment.
Open tool →CAGR Calculator
Calculate compound annual growth rate between two endpoint values.
Open tool →Commission Calculator
Calculate sales commission and total compensation from rate and optional base pay.
Open tool →Simple Interest Calculator
Calculate simple interest from principal, annual rate, and time.
Open tool →Everyday Calculators and Converters
Random Number Generator
Generate a random whole number inside an inclusive range directly in your browser.
Open tool →Dice Roller
Roll one or more virtual dice locally with cryptographic randomness.
Open tool →Random Name Picker
Choose one random name or item from a list in your browser.
Open tool →Random Team Generator
Randomly distribute a list into balanced teams in your browser.
Open tool →Coin Flip
Simulate one or many browser-local coin flips with heads/tails counts and percentages.
Open tool →Age Calculator
Calculate completed years of age and elapsed calendar days between two dates.
Open tool →Unit Converter
Convert common distance, mass, and temperature units with transparent conversion factors.
Open tool →Time Duration Calculator
Calculate elapsed hours and minutes between clock times, including overnight intervals.
Open tool →Time Zone Converter
Convert date and clock time between common named time zones using browser time-zone data.
Open tool →World Meeting Planner
Convert one UTC meeting instant into three destination time zones.
Open tool →Business Day Calculator
Count Monday-to-Friday business days and optionally exclude holiday dates you provide.
Open tool →Fuel Cost Calculator
Estimate trip fuel use and cost from your own distance, efficiency, and fuel-price assumptions.
Open tool →Mileage Cost Calculator
Estimate mileage expense from distance and a user-entered cost-per-mile rate.
Open tool →Electricity Cost Calculator
Estimate electricity use and cost from power, hours, days, and your entered energy rate.
Open tool →Design and Accessibility Tools
Color Contrast Checker
Check two sRGB colors against common WCAG AA text-contrast thresholds.
Open tool →HEX to RGB Converter
Convert a HEX color to its RGB channel values in your browser.
Open tool →Color Palette Generator
Generate a deterministic five-color palette from a base HEX color.
Open tool →CSS Gradient Generator
Create and preview two-color linear or radial CSS gradients.
Open tool →Image Aspect Ratio Calculator
Simplify image dimensions to an aspect ratio and calculate proportional sizes.
Open tool →Image Compressor
Compress JPEG, PNG, or WebP images locally.
Open tool →Image Resizer
Resize images to exact pixel dimensions locally.
Open tool →Image Cropper
Crop an exact pixel rectangle from an image locally.
Open tool →Image Format Converter
Convert PNG, JPEG, or WebP formats locally.
Open tool →Image to PDF Converter
Combine images into a browser-local PDF.
Open tool →Merge PDF
Merge multiple PDF files locally.
Open tool →Split PDF
Extract selected pages from a PDF locally.
Open tool →Screen Size Calculator
Calculate ideal physical width and height from diagonal size and aspect ratio.
Open tool →AI, Text, and Productivity Tools
Countdown Timer
Count down to a date, event, deadline, meeting, launch, or personal milestone.
Open tool →Online Stopwatch
Start, pause, resume, and reset elapsed time directly in your browser.
Open tool →Pomodoro Timer
Run configurable focus and break intervals with pause, resume, and reset controls.
Open tool →Work Hours Calculator
Calculate paid daily and weekly hours from start time, end time, unpaid break, and workdays.
Open tool →Time Card Calculator
Calculate daily and weekly paid hours from clock-in, clock-out, and unpaid breaks.
Open tool →Hours to Decimal Calculator
Convert hours and minutes to decimal hours and back.
Open tool →Date Calculator
Calculate days between dates or add and subtract whole calendar days.
Open tool →Week Number Calculator
Find the ISO 8601 week number, week-year, and weekday for a date.
Open tool →Prompt Optimizer
Turn a rough AI prompt into a clearer prompt with role, task, context, and output format.
Open tool →Text Summarizer
Create a shorter summary of pasted text or supported documents with key points and word-count reduction.
Open tool →Featured Guides
Learn the method behind the tools with worked examples, edge cases, limitations, and authoritative references.
APA 7 vs MLA 9 vs Chicago 18
Compare major citation systems using the same source and learn where formatting rules diverge.
Read guide →How to Verify a Citation
Separate source accuracy from formatting and follow a practical field-by-field verification workflow.
Read guide →GPA, Weighted GPA, and Final Grades
Work through the formulas and understand where institutional grading policies change the answer.
Read guide →Mean, Median, Variance, and Standard Deviation
See how location and spread differ, and how outliers change common descriptive statistics.
Read guide →CSV vs JSON
Understand headers, quoted fields, types, missing values, duplicate columns, and nested data.
Read guide →Browse All Practical Guides
Explore the current learning library and new guides as they pass research and public QA.
Open Guides →For Organizations
Explore controlled PTH Embed pilots for publishers, education organizations, agencies, and developer platforms.
For Organizations
See how the embed beta works, what is live today, the privacy model, onboarding steps, and current limitations.
Explore organization options →Publishers
Add selected calculators or technical utilities beside explanatory, tutorial, and reference content.
Explore publisher use cases →Education
Evaluate selected math, statistics, and text utilities for tutoring, learning, and resource pages.
Explore education use cases →Agencies
Evaluate maintained utilities, approved-site controls, and controlled branding for selected client experiences.
Explore agency use cases →Developer Platforms
Embed selected developer utilities or evaluate controlled API access for clear automation use cases.
Explore developer use cases →PTH Embed Beta
Review the current qualified tool set, architecture, privacy model, product boundaries, and beta access path.
Explore PTH Embed →Why use Practical Tools Hub?
Each tool is designed to be practical, transparent, and easy to use. Where formulas, assumptions, data sources, formatting rules, or limitations matter, the individual tool page explains them in plain English.
Many tools are designed to process information directly in your browser where possible. Avoid entering sensitive personal, medical, legal, financial, confidential business, password, API key, or other private data into any online tool unless you understand how that tool handles information.
Learn more about Practical Tools Hub , contact us , browse the Practical Guides , review the Editorial Methodology , or read the Privacy Policy .