LifeHackToolbox: fast, free everyday calculators.
LifeHackToolbox is a small set of simple tools you can use right in your browser. Everything here is free, requires no signup, and is designed to feel modern and easy to use on both phone and desktop.
- Free with no account or signup
- Modern, focused interface
- Works great on phones and laptops
Browse tools
Math & converters
Function Grapher (Interactive)
Graph functions like x^2 and sin(x) with pan/zoom, intercepts, a value table, shareable links, and PNG export.
Matrix Calculator & Visualizer
Matrix multiplication, transpose, determinant, inverse, and solving Ax=b with keyboard-friendly editing plus JSON/CSV export.
Probability Simulator (Coin/Dice/Cards)
Compare theoretical probability vs simulation with histograms and convergence charts, plus CSV export and branded PNG snapshots.
Statistics Explorer (Charts + Summary)
Paste numbers or upload CSV to compute mean/median/std dev, quartiles, IQR outliers, plus histogram and box plot with CSV and PNG exports.
Money & bills
Hourly to Salary Paycheck & After-Tax
Convert between hourly and salary pay and see your estimated take-home pay after taxes by state.
Mortgage Payoff & Amortization
Estimate your monthly payment, see a full payoff schedule, and explore how extra payments can reduce interest and shorten your mortgage term.
Receipt Bill Splitter
Enter receipt items, pick who ordered what (or who is sharing), and let the tool split the bill with tax and tip included. Everything runs on your device.
Rent vs Buy Calculator
Compare renting versus buying a home with full monthly cost breakdown, net worth over time, and a clear break-even year under your assumptions.
Home & everyday life
Random Meal Generator
Stuck on what to eat? Get a random meal idea filtered by diet and calories.
Smoothie Macro Calculator
Build a custom smoothie and see total calories, protein, carbs, and fat.
Paint Coverage Calculator
Estimate how many gallons of paint you need for one or more rooms, including doors, windows, ceilings, and coats.
Grass Seed Coverage Calculator
Estimate how many bags of grass seed you need. Supports top brands, new lawns, reseeding, and custom mixes.
How Long to Freeze?
Pick a food, freezer type, and frozen-on date to see how long it's recommended to keep it frozen and when quality starts to drop.
Health, fitness & family
Baby Kick Counter
Count and time baby movements in a calm, mobile-friendly tracker. Includes recent session history. Not medical advice.
Body Progress Tracker
Log your weight and measurements, see BMI and calorie estimates, and track progress toward your goals over time.
Workout Tracker
Log your strength and cardio sessions, track lifts over time, and export your training log as CSV or shareable charts.
Baby Name Generator
Explore boy, girl, and neutral names by origin and meaning, then randomize first and middle names with your last name.
Baby Genetic Predictor
Predict your baby's height, eye color, and hair color with beautiful data-driven visualizations.
Life Expectancy Explorer
Estimate your remaining years of life by age, sex, country, and lifestyle, with survival curves and risk visualizations.
School, study & classroom tools
Weighted Grade Calculator
Add class categories and weights to see your current grade as a weighted percentage.
Time Duration Calculator
Find the time between two dates or add/subtract days, hours, minutes, and seconds from a specific date and time.
Universal Unit Converter
Convert between units of length, weight, volume, temperature, speed, area, pressure, data, and more in a clean, mobile-friendly interface.
Unit Circle Calculator & Trig Explorer
Explore the unit circle with an interactive trig calculator. See angles in degrees and radians, and view sine, cosine, and tangent values with exact trig ratios.
Interactive Periodic Table
Explore all 118 elements with category filters, property maps, and detailed atomic data in a fully interactive table.
Molecular Weight (Molar Mass) Calculator
Parse formulas like Ca(OH)2 and Al2(SO4)3 to calculate total molar mass and percent composition with exports to JSON and CSV.
Cell Structure Explorer (Interactive)
Click organelles on an interactive animal cell diagram, search terms, and quiz yourself with a study mode that tracks your best score.
Punnett Square Generator
Generate single-gene and dihybrid Punnett squares with genotype and phenotype ratios, plus step-by-step explanations and exportable results.
Algorithm Visualizer (Sorting + Searching)
Visualize sorting algorithms and binary search with step-by-step playback, speed control, and counters for comparisons and swaps.
Projectile Motion Simulator
Plot and animate projectile motion with gravity presets and optional air resistance, plus time of flight, range, max height, and CSV/PNG exports.
Scale of the Universe Explorer
Smoothly zoom from subatomic sizes to galaxies and the observable universe, with search, favorites, a guided tour, and exportable snapshots.
DNA Sequence Explorer
Visualize DNA sequences, codons, and amino acids with an interactive viewer and exportable charts and tables.
Solar System Orbit Simulator
Watch the planets circle the Sun in real time and tap each one to explore orbital periods, distances, and temperatures.
Team Randomizer
Split a class, roster, or group into fair random teams in seconds.
Work, docs & developer tools
Resume Builder
Create an ATS-friendly resume in your browser with no login, then export it to PDF, Word, plain text, or Markdown.
PDF Signature & Form Filler
Sign PDFs and add basic text form fields directly in your browser. No upload, fully client-side.
Email Signature Generator
Build a professional HTML email signature with your details, links, and logo, then copy the HTML or export a PNG preview.
Regex Playground (Tester + Highlighter)
Test regex patterns with highlighted matches, capture groups, presets, and a beginner-friendly token explanation panel.
JSON Linter & Formatter
Validate and format JSON locally, then copy or download the result with no data sent to a server.
Diff Checker
Compare two blocks of text or code, highlight additions and deletions, and download a simple diff.
QR Code Generator
Build QR codes for links, Wi‑Fi networks, and messages, customize colors, and download a PNG with optional branding.
Random Password Generator
Generate strong random passwords with custom character sets and a quick strength estimate, all in your browser.
Binary / Decimal / Hex / Octal Converter
Convert between binary, decimal, hexadecimal, and octal, and visualize bits and place values. Perfect for computer science students.
HEIC to JPG & Image Converter
Convert HEIC, JPG, PNG, and WEBP images directly in your browser with optional max file size and quality controls. Nothing is uploaded.
Design & visual tools
Creative & fun
Online Piano Keyboard
Play a virtual piano in your browser using your mouse or QWERTY keyboard across multiple octaves.
Custom Dice Roller & RPG Dice Simulator
Roll d4, d6, d8, d10, d12, and d20 dice with modifiers, animations, and roll history. Perfect for DnD and tabletop RPGs.
Online Beat Maker
Build drum patterns with a 16-step sequencer for kick, snare, hi-hats, and bass. Runs entirely in your browser using the Web Audio API.
Pixel Drawing Grid & Graph Paper
Draw pixel art and graph paper designs with an adjustable grid, color picker, undo/redo, and PNG export, all in your browser.
What is LifeHackToolbox?
LifeHackToolbox is a growing collection of fast, practical, free everyday calculators and interactive tools you can use directly in your browser. The goal is simple: remove friction from small decisions and common tasks that people deal with every week. Instead of hunting through ad-heavy sites, downloading apps, or signing up for accounts, you can open a tool, get the answer, and move on.
Everything on the site is designed to be browser-based and private. Tools run on your device, not on a backend server. There is no login required, and the site is built around the idea that you should be able to solve a problem without giving away personal data. Some tools may store small preferences or history using your browser's local storage for convenience, but LifeHackToolbox does not need accounts to be useful.
A toolbox for math, science, finance, and design
The tools are intentionally diverse because real life is diverse. One day you might need a finance check like a rent vs buy comparison; another day you might need a conversion for a recipe, a homework assignment, or a DIY project. LifeHackToolbox groups tools into categories so you can browse quickly and find what you need:
- Money & bills: quick calculators for real-world decisions like paycheck estimates, budgeting tradeoffs, or mortgage planning.
- School and science: tools for learning and exploration, such as number base conversions, unit conversion, DNA and periodic table references, and interactive visualizers.
- Work and documents: browser-native utilities like a resume builder, PDF signer, diff checker, QR generator, and formatters for structured text.
- Design and creative tools: utilities for colors, images, and lightweight creative experimentation like pixel grids and browser-based instruments.
Built for speed, clarity, and mobile use
A good calculator is not just correct—it is also easy to use on a phone, easy to understand, and honest about what it can and cannot do. LifeHackToolbox focuses on clean layouts, readable inputs, and outputs that explain themselves. Many tools include charts or visualizations when they make the result easier to interpret, and every tool page includes a plain-English section explaining how the calculator works, common edge cases, and why the concept matters.
When a tool relies on assumptions, those assumptions are shown directly in the UI. When a result is an estimate rather than a fact, the tool says so. The point is clarity: you should be able to understand the direction of the answer and what would change it, not just copy a number out of a box.
Mission: make everyday problem-solving feel effortless
LifeHackToolbox exists because the internet is full of tools that are technically useful but unpleasant to use—slow pages, intrusive popups, confusing interfaces, and forced sign-ups. This site is built with the opposite philosophy: fast, focused tools that respect your time. Whether you are planning your finances, studying for a class, preparing documents, building something at home, or just exploring out of curiosity, the mission is to give you a dependable set of small utilities that feel good to use.
If you are new here, the best way to start is to browse the categories above and open whatever matches your current need. The site is meant to be revisited: a practical, evolving toolbox you can rely on whenever a small calculation or conversion comes up.