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Tools in this directory come from 658+ source sites — from established names like Calculator.net and Omni Calculator to specialised single-purpose tools.
onlinetools.com/number
Online Number Tools is the OnlineTools.com sub-site for number sequences, matrix operations, primality, fractions, base conversion, and arithmetic operations.
onlinepngtools.com
Online PNG Tools is a focused suite of 400+ browser-based PNG utilities — conversions, alpha-channel operations, colour manipulation, sizing, effects, and logo/icon/signature tooling.
onlinetools.com/random
Online Random Tools is the OnlineTools.com sub-site for randomness — shuffling, generating random numbers, dates, IPs, UUIDs, passwords, and picking winners.
onlinetsvtools.com
onlinetsvtools.com hosts Base64 to TSV, a simple online tool for converting base64 encoded data into tab-separated values (TSV) format.
onlinetexttools.com
Online Text Tools is a focused 200+ collection of single-purpose text manipulation utilities — splitting, joining, sorting, randomizing, formatting, encoding, and analysing text in every conceivable way.
onlinetools.com/utf8
Online UTF-8 Tools is the OnlineTools.com sub-site for UTF-8 encoding — base conversions, code-point handling, case operations, and cross-encoding utilities.
onlinetools.com/unicode
Online Unicode Tools is the OnlineTools.com sub-site for Unicode — encoding conversion, code-point handling, grapheme operations, and homoglyph (spoofing) tools.
onlinewebdevtools.com
Online Web Dev Tools is a domain hosting various web development utilities. One tool offered is Base64 to Hexadecimal converter for encoding and decoding tasks in web development.
onlinexmltools.com
Online XML Tools is a focused collection of XML-specific utilities — formatting, validation, conversion to JSON / CSV / YAML / TSV, encoding, and inline editing.
onlineyamltools.com
Online YAML Tools is a focused collection of YAML-specific utilities — formatting, validation, conversion to JSON / XML / CSV / TSV, encoding, and inline editing.
online-convert.com
online-convert.com hosts BMP to PNG Converter, a tool for converting bitmap images to PNG format online.
onlinecalculator.com
OnlineCalculator.com is a site offering various online calculators and converters, including a Barrels to Liters Volume Converter.
onlinecompress.net
onlinecompress.net provides online video compression tools to help users reduce file sizes without compromising quality.
onlineconversion.com
OnlineConversion.com hosts a variety of online conversion tools, including an Astronomical Unit Calculator, Barometric Pressure Conversion, Base converter, and more. These tools help users convert units across different measurement systems for scientific, engineering, and everyday use.
onlinetoolkit.co
OnlineToolkit.co hosts a range of useful online tools for various needs. Currently featuring an Average Rating Calculator to help with averaging scores or ratings efficiently.
onlinetools.com
onlinetools.com hosts a collection of image and data conversion tools, including Base64 to JSON converter and BMP to Base64 encoder.
onlycalculators.com
OnlyCalculators.com hosts a variety of useful online calculators, including an Associative Property Calculator, BC to AD Converter, Ballistic Coefficient Calculator, and Beta Distribution Calculator. These tools help users with mathematical and conversion tasks efficiently.
openpsychometrics.org
openpsychometrics.org hosts a collection of psychological assessment tools designed to help individuals understand themselves better and explore career options through personality quizzes and other assessments.
orbit2x.com
Orbit2x provides navigation-focused web utilities for coordinate and route calculations.
pdfcandy.com
PDF Candy offers a friendly free-tier PDF toolbox covering editing, merging, splitting, security, compression, OCR-style operations, and page rearrangement.
pdf24.org
PDF24 is a genuinely free PDF toolbox with 25+ tools for merging, splitting, compressing, converting, signing, redacting, and OCR — all running with no file size limits or signup required.
pagespeed.web.dev
PageSpeed Insights from Google measures real-world performance of a web page on mobile and desktop, with Core Web Vitals scores and optimisation suggestions.
pampers.com
Pampers.com hosts useful tools for parents, including a Baby Percentile Calculator to help track growth and development.
parentcalc.com
ParentCalc.com hosts a Baby Formula Calculator to help parents determine the right amount of formula for their baby based on weight and feeding frequency.
payscale.com
PayScale offers salary reports to help people understand earning potential and market pay. ([payscale.com](https://www.payscale.com/salary?utm_source=openai))
pearson.com
Pearson.com hosts a variety of educational calculators, including the Beer-Lambert Law Calculator, Atom Economy Calculator, Average Atomic Mass Calculator, and Avogadro's Number Calculator, designed to assist with scientific calculations.
pedalscience.com
Pedal Science is a website dedicated to helping cyclists improve their performance with various tools. Their Bike Speed Calculator allows users to input their cadence and wheel size to determine their speed in miles per hour, aiding in training and racing preparation.
peditools.org
PediTools is peditools.org hosts a collection of essential health and wellness tools for parents, including a Baby Percentile Calculator to help monitor your child's growth.
pelletpath.com
Pellet Path is a resource for shooting enthusiasts, offering tools like the Ballistic Coefficient Calculator to help users improve their accuracy and performance in pellet shooting.
phuoc.us
Phuoc's Portfolio Visualizer is a site hosting an Asset Allocation Calculator & Visualizer to help users optimize their investment portfolios.
piday.org
Pi Day hosts a focused collection of 20+ math calculators centred around geometry, financial math, and academic grading — a mix of high-school and college-level reference tools.
picsart.com
Picsart.com hosts a variety of image and graphic editing tools, including a Banner Size Calculator to help users determine optimal dimensions for their designs.
pigly.com
Pigly.com hosts financial calculators including a Balloon Payment Calculator and Bank Reconciliation Calculator to help manage personal finances effectively.
pinetools.com
PineTools is a collection of free online tools across math, colours, text, numbers, dates, images, randomness, programming, and video — a multi-category Swiss Army knife.
pineify.app
Pineify.app hosts a suite of financial planning tools including the Beta Stock Calculator and Asset Allocation Calculator & Visualizer to help users manage their investments effectively.
pipeng.com
pipeng.com hosts Pipeng Toolbox, offering practical tools like a Baume to Specific Gravity Density Converter for various applications.
pixedra.com
An online utility platform offering free SEO and web maintenance tools. ([pixedra.com](https://www.pixedra.com/301-redirect-generator?utm_source=openai))
playbacktimer.com
PlaybackTimer.com hosts video speed calculators tailored for various media formats like videos, YouTube clips, and audiobooks, allowing users to adjust playback speeds easily.
plummerindustries.com
Plummer Industries is a resource for mechanical engineers and DIY enthusiasts. It hosts a Belt Length Calculator to help determine the correct belt length for pulley systems.
pokopiaisland.com
Pokopia Island is a platform hosting various construction and planning tools designed for users looking to design and plan their projects efficiently. Their Pokopia Build Planner offers a suite of features tailored to simplify building and renovation processes.
policybazaar.com
Insurance and financial product marketplace with educational articles and calculators for retirement planning. It hosts multiple pension-related tools and guides. ([policybazaar.com](https://www.policybazaar.com/life-insurance/pension-plans/articles/atal-pension-yojana-calculator/?utm_source=openai))
portfolio-rebalancer.app
Portfolio Rebalancer.app provides an Asset Allocation Planner Calculator to help users determine and adjust their investment portfolio for optimal risk and return.
portfoliotoolbox.com
Portfolio Toolbox provides browser‑based investing tools including an asset class returns chart. ([portfoliotoolbox.com](https://portfoliotoolbox.com/asset-classes.html?utm_source=openai))
postman.com
Postman API Network (Microsoft Graph Workspace) is a platform offering tools for developers to manage and test Microsoft Graph APIs, with Azure AD PowerShell Generator as an example of its capabilities.
powerstream.com
PowerStream.com hosts a Battery Size Calculator tool, helping users determine optimal battery sizes for various applications.
pregnancycalculatorai.com
Pregnancy Calculator AI is a site offering various tools to help with pregnancy planning and tracking. Their BBT Calculator helps users determine their fertile window by analyzing basal body temperature data.
pregnancychancecalculator.com
Pregnancy Chance Calculator is a website that provides tools to help couples predict their chances of conception based on basal body temperature (BBT). It includes a BBT calculator to track and analyze fertility trends.
princetonreview.com
Princeton Review is an educational website offering various resources and tools to help students, including a Career Personality Quiz designed to assist with career exploration and planning.
prioritybicycles.com
prioritybicycles.com provides useful tools for cyclists, including a Bike Fit Calculator to help determine the optimal fit for your bicycle.
producercalc.com
producercalc.com hosts BPM Calculator, an online tool to help you calculate beats per minute for various purposes like music production and dance.
progressive.com
Progressive.com hosts an Auto Depreciation Calculator to help estimate the value of vehicles over time.
propercalculators.com
Multi-category calculator and converter site covering chemistry, physics, finance, and more. ([propercalculators.com](https://propercalculators.com/))
punnettsquares.com
punnettsquares.com hosts tools for genetic calculations, including a Baby Eye Color Calculator to predict the possible eye colors of offspring based on parents' eye colors.
quadient.com
Quadient.com hosts an Average Collection Period Calculator tool to help businesses determine how long it takes to collect payments from customers.
quickminitools.com
Quick Mini Tools is a free online tools site with calculators across categories like physics. Its pages provide interactive inputs and explanations for each tool. ([quickminitools.com](https://quickminitools.com/physics/attenuation-calculator))
quickconver.com
Unit conversion website offering calculators for common measurement categories like pressure, length, and temperature. ([quickconver.com](https://www.quickconver.com/atm-to-psi/?utm_source=openai))
quicktooly.com
QuickTooly.com hosts a collection of useful tools for various tasks, including a Basal Area Calculator to help with forestry and land management calculations.
qxmd.com
qxmd.com hosts a BASDAI Score Calculator, which helps in assessing the severity of bone and joint pain in rheumatoid arthritis patients.
random.org
RANDOM.ORG generates true random numbers from atmospheric noise — used since 1998 for lotteries, games, gambling, security, statistics, and academic research.
rfwireless-world.com
rfwireless-world.com hosts RF Wireless World, a site providing tools for RF design and engineering. It offers calculators like the Bandwidth Delay Product Calculator and Balanced Attenuator Calculator to assist with RF signal analysis.