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

Money & bills

Home & everyday life

Health, fitness & family

School, study & classroom tools

Weighted Grade Calculator

Add class categories and weights to see your current grade as a weighted percentage.

Open calculator

Time Duration Calculator

Find the time between two dates or add/subtract days, hours, minutes, and seconds from a specific date and time.

Open tool

Universal Unit Converter

Convert between units of length, weight, volume, temperature, speed, area, pressure, data, and more in a clean, mobile-friendly interface.

Open tool

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.

Open tool

Interactive Periodic Table

Explore all 118 elements with category filters, property maps, and detailed atomic data in a fully interactive table.

Open tool

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.

Open calculator

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.

Open explorer

Punnett Square Generator

Generate single-gene and dihybrid Punnett squares with genotype and phenotype ratios, plus step-by-step explanations and exportable results.

Open generator

Algorithm Visualizer (Sorting + Searching)

Visualize sorting algorithms and binary search with step-by-step playback, speed control, and counters for comparisons and swaps.

Open visualizer

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.

Open simulator

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.

Open explorer

DNA Sequence Explorer

Visualize DNA sequences, codons, and amino acids with an interactive viewer and exportable charts and tables.

Open tool

Solar System Orbit Simulator

Watch the planets circle the Sun in real time and tap each one to explore orbital periods, distances, and temperatures.

Open simulator

Team Randomizer

Split a class, roster, or group into fair random teams in seconds.

Open tool

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.

Open builder

PDF Signature & Form Filler

Sign PDFs and add basic text form fields directly in your browser. No upload, fully client-side.

Open tool

Email Signature Generator

Build a professional HTML email signature with your details, links, and logo, then copy the HTML or export a PNG preview.

Open generator

Regex Playground (Tester + Highlighter)

Test regex patterns with highlighted matches, capture groups, presets, and a beginner-friendly token explanation panel.

Open playground

JSON Linter & Formatter

Validate and format JSON locally, then copy or download the result with no data sent to a server.

Open tool

Diff Checker

Compare two blocks of text or code, highlight additions and deletions, and download a simple diff.

Open tool

QR Code Generator

Build QR codes for links, Wi‑Fi networks, and messages, customize colors, and download a PNG with optional branding.

Open tool

Random Password Generator

Generate strong random passwords with custom character sets and a quick strength estimate, all in your browser.

Open generator

Binary / Decimal / Hex / Octal Converter

Convert between binary, decimal, hexadecimal, and octal, and visualize bits and place values. Perfect for computer science students.

Open tool

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.

Open tool

Design & visual tools

Creative & fun

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.