Useful online tools for everyone
64 tools in one place, so you can stop switching tabs.
Convert, compare, format, and plan in seconds. Most tools run directly in your browser with no signup, no upload flow for core tasks, and clean mobile-friendly pages.
Browse by category
Choose a category below and open the exact tool you need. Each tool has a clear page, practical copy, and one-click actions built for everyday use.
Developer & Data Tools
UUID Generator
Create unique IDs instantly for apps, forms, and automation.
Developer ToolsJSON Formatter & Beautifier
Clean up messy JSON and validate it in one click.
Developer ToolsPython Dict Converter
Convert Python dict and JSON both ways quickly.
Developer ToolsBase64 Encoder Decoder
Encode or decode Base64 text for APIs and configs.
Developer ToolsBase64 to Image Converter
Decode Base64 image strings and download the image file.
Developer ToolsImage to Base64 Converter
Convert PNG/JPG/WebP files into Base64 strings instantly.
Developer ToolsHash Generator
Generate SHA hashes in-browser for checks and verification.
Developer ToolsQR Code Generator
Turn links and text into custom QR codes.
Developer ToolsJWT Decoder
Decode JWT payload details for quick token checks.
Developer ToolsMarkdown Preview
Write Markdown and preview rendered output instantly.
Developer ToolsJSON Compare
Structural diff for JSON documents.
Developer ToolsCron Expression Builder
Build cron schedules and copy valid expressions.
Developer ToolsRegex Tester
Test regex patterns live with flags and match highlights.
Developer ToolsSQL Formatter
Format SQL for readability or minify for compact output.
Developer ToolsCSV to JSON Converter
Convert CSV to JSON and JSON back to CSV.
Developer ToolsPDF Tools
Image Tools
Text Tools
Everyday Utilities
Color Picker
Pick and copy HEX, RGB, and HSL values.
Utility ToolsUnix Timestamp Converter
Convert Unix time, ISO, and date formats.
Utility ToolsWorld Clock
See live time across major cities instantly.
Utility ToolsURL Encoder Decoder
Encode and decode URL text safely.
Utility ToolsWhat Is My IP Address
Check your public IPv4/IPv6 address.
Utility ToolsTimezone Meeting Planner
Find meeting times that work across countries.
Utility ToolsUnit Converter
Convert length, weight, and temperature quickly.
Utility ToolsCurrency Converter
Convert currencies with live reference exchange rates.
Utility ToolsIP from URL
Resolve domain names to A/AAAA IP records.
Utility ToolsPassword Generator
Generate crypto-secure passwords with custom options.
Utility ToolsIP to Location
Look up country, city, timezone, and ISP for a public IP.
Utility ToolsPercentage Calculator
Percent of, ratio, and increase or decrease in one place.
Utility ToolsRandom Number Generator
Pick random integers in a range with optional unique draws.
Utility ToolsMath Calculators
BMI Calculator
Body mass index from height and weight in metric or imperial units.
Math ToolsAge Calculator
Exact age in years, months, and days from your date of birth.
Math ToolsTip Calculator
Restaurant tip and bill splitter with quick percent presets.
Math ToolsLoan EMI Calculator
Monthly installment, total interest, and amortization schedule.
Math ToolsCompound Interest Calculator
Future value and interest earned with multiple compounding options.
Math ToolsDiscount Calculator
Sale price, savings amount, and reverse discount percentage.
Math ToolsScientific Calculator
Sin, cos, tan, log, sqrt, and powers — fully keyboard operable.
Math ToolsAverage Calculator
Mean, median, mode, range, and sum from a list of numbers.
Math ToolsArea & Volume Calculator
Circle, rectangle, triangle, sphere, cylinder, and more shapes.
Math ToolsNumber Base Converter
Binary, octal, decimal, and hex conversions shown simultaneously.
Math ToolsFraction Calculator
Add, subtract, multiply, divide fractions with GCD simplification.
Math ToolsSpeed Distance Time Calculator
Solve for any of the three variables with unit conversion.
Math ToolsGCD & LCM Calculator
Greatest common divisor and least common multiple for up to 10 numbers.
Math ToolsPrime Number Checker
Primality test, primes in a range, and prime factorization.
Math ToolsQuadratic Equation Solver
Solve ax²+bx+c=0 with real and complex roots displayed.
Math ToolsScience Tools
Interactive Periodic Table
All 118 elements with properties, categories, and electron configuration.
Science ToolsMolar Mass Calculator
Parse any chemical formula and compute molecular weight in g/mol.
Science ToolsPhysics Calculator
Kinematics, forces, energy, and wave formulas with solve-for logic.
Science ToolsOhm's Law Calculator
Solve for voltage, current, resistance, or power.
Science ToolsGas Laws Calculator
Boyle's, Charles's, Gay-Lussac's, combined, and ideal gas law.
Science ToolsHalf-Life Calculator
Radioactive decay: find remaining amount, elapsed time, or half-life.
Science ToolsWavelength & Frequency Calculator
Solve wavelength, frequency, wave speed, and period with unit conversion.
Science ToolsDensity Calculator
Solve density, mass, or volume — with common material reference.
Science ToolsResistor Color Code Calculator
4-band and 5-band resistor color code to resistance value and back.
Science ToolspH Calculator
Convert pH, pOH, [H+], and [OH-] with acid/base classification.
Science ToolsFormula Cheatsheet
Quick-reference formulas for math, physics, and chemistry — browse and copy.
Science ToolsWhy people bookmark WebToolz365
Private by default
Core tools run locally in your browser, so your data stays with you.
Fast workflow
No accounts or setup. Open, paste, convert, copy, done.
Always free
No trial locks or hidden upgrades for basic utility tasks.
Works worldwide
Mobile and desktop friendly tools for students, teams, and creators.