Toolcroft

Free, browser-only tools.

668+ calculators, converters, generators, and utilities. Every tool runs entirely on your device: nothing is uploaded.

Financial Calculators

63 tools

Loans, mortgages, savings, taxes, and other money calculators.

Tip Calculator Loan Calc Discount Calc Sales Tax Calculator Mortgage Calculator Compound Interest Calculator Retirement Auto Loan Savings Goal ROI Calculator Profit Margin Salary ↔ Hourly Tax Bracket Estimator Cost-of-Living Comparison Break-Even Calculator Debt Payoff Calculator Net Worth Calculator Emergency Fund Calculator DCA Calculator Inflation Calculator Budget Planner NPV / IRR Calculator Investment Fee Calculator Electricity Bill CAGR Calculator Unit Price Comparison Mortgage Points Calculator Refinance Calculator Rent vs. Buy Lease vs. Buy Bond Yield Calculator Options Pricer 401(k) Calculator Roth vs Traditional IRA RMD Calculator Position Size Calculator Crypto P&L Calculator Hourly ↔ Salary SE Tax Calculator CC Payoff Capital Gains Stock Average Stock Split Present Value Future Value Annuity HSA / FSA Commission Cash Counter Amortization Schedule APR APY Converter CD Ladder Calculator 529 College Savings Calculator Estate Calculator FIRE Calculator Gross-Up Calculator Lakh-Crore Converter Loan Comparison P/E & Graham Number Rent Affordability Salary Comparison Subscription Analyzer Zakat Calculator

Math Calculators

63 tools

Percentages, fractions, statistics, geometry, and number theory.

Percentage Roman Numeral Converter Statistics Quadratic Solver Fractions GPA Calculator Final Grade Triangle Solver Right Triangle Calc Slope Calculator Distance Formula Permutations & Combinations Probability Calculator Decimal to Fraction Scientific Calculator Ohm's Law Calculator Matrix Calculator Prime Number Tools GCD & LCM Calculator Fibonacci Generator Scientific Notation Converter Number to Words Polynomial Solver Linear System Solver Derivative Calculator Integral Calculator Big Number Calculator Modular Arithmetic Continued Fraction Converter Sequence Detector Vector Calculator Complex Number Calculator Circle Calculator Ellipse Calculator Polygon Calculator 3D Shape Calculator Pythagorean Calculator Midpoint / Distance Calculator Truth Table Ratio Calculator Sig Figs Z-Score Confidence Interval Log Calculator Trig Calculator Unit Circle Birthday Paradox Bitwise Calculator Collatz Visualizer Dice Probability Distribution Calculator Fourier Series Visualizer Fractal Explorer Function Grapher Conway's Game of Life Linear Regression Magic Square Generator Number Theory Explorer Pascal's Triangle Poker Odds Spirograph Tower of Hanoi Venn Diagram

Health & Fitness

49 tools

Body composition, fitness, and pace calculators.

BMI Calculator BMR Calculator Macros Habit Tracker Pet Age Calculator Steps to Distance Calorie Burn Water Intake Calculator Sleep Cycle Calculator Blood Pressure Checker BAC Calculator Ideal Weight Calculator Ovulation Calculator Waist-to-Hip Ratio VO2 Max Calculator Lean Body Mass Calculator Wilks Score Calculator Race Time Predictor Treadmill Pace Converter Calorie Tracker Period / Cycle Tracker Workout Volume Calculator Pace Calculator HR Zone Calculator 1RM Calculator Body Fat Calculator Due Date Calculator Swim Pace Cycling Power A1C Calculator Breathing Exercise Alcohol Units Calculator Baby Formula Calculator Biological Age Estimator Body Frame Calculator Fasting Timer FTP Zones Calculator Glycemic Load Calculator Growth Percentile Calculator Heat Index Calculator Pet Food Calculator Pregnancy Weight Gain Calculator Running Cadence Calculator Sleep Tracker SPF Calculator Sweat Rate Calculator UV Index Calculator Waist-Height Ratio Wind Chill Calculator

Date & Time

38 tools

Timezones, age, durations, countdowns, and timers.

Age Calculator Date Difference Timezone Converter World Clock Pomodoro Timer Countdown Timer Stopwatch Unix Timestamp Converter Working Days Date Add/Subtract Meeting Planner Birthday Countdown Time Duration Calculator Easter Date Calculator Chinese Zodiac Calculator Zodiac Sign Calculator Julian Date Converter Hijri Calendar Converter Hebrew Calendar Converter Holiday Countdown Day of Week Calculator Time Card Calculator Lunar Phase Calculator Sunrise / Sunset Days Since ICS Generator Anniversary Calculator Equinox Calculator Fiscal Quarter Calculator Generation Finder Golden Hour Calculator Haversine Calculator Leap Year Calculator Life Calendar Stargazing Planner Tenure Calculator Tidal Prediction Week Number Calculator

Text Tools

53 tools

Counters, case converters, sorters, and text generators.

Case Converter Lorem Ipsum Word Counter Markdown Preview Sort Lines Remove Duplicates Slug Generator Markdown Editor Find & Replace Fancy Text Generator Word Frequency Counter Reading Level Estimator Morse Code Translator HTML -> Markdown Anagram Solver Text Redactor Text Statistics Whitespace Cleaner Text Indenter Line Number Adder Text Truncator Pig Latin Translator NATO Phonetic Converter Text Similarity Unslugify Tool Reverse Text Text to Speech Emoji Picker Citation Generator Word Cloud Random Words Rhyme Finder Syllable Counter Title Case Upside Down Text Zalgo Text ASCII Text Art Username Generator Name Generator Text to Handwriting Writing Prompts Acrostic Generator Bionic Reading Braille Converter Leet Speak Converter Mnemonic Generator Palindrome Checker Phone Formatter Phonetic Matcher Reading Time Estimator Speed Reading Trainer SWIFT Code Validator Text Summarizer

Color Tools

30 tools

Color converters, palette generators, contrast checkers, gradients.

Color Converter Contrast Checker Palette Generator Gradient Generator Color Blindness Box Shadow Color Name Finder Tints & Shades Color Mixer Color Temperature Color Reference Library CSS Filter Generator CSS Grid Flexbox CSS Animation Bezier Editor Clip Path Border Radius Glassmorphism Neumorphism SVG Blob SVG Patterns CSS Loaders CSS Button Generator CSS Triangle Generator Hue Vision Test Gradient Generator Scroll Playground Scrollbar Styler Toggle Switch Generator

Developer Tools

79 tools

Formatters, validators, encoders, and reference tools for developers.

JSON Formatter Number Base Converter JWT Decoder Regex Tester Text Diff Cron Builder Subnet Calculator UA Parser CSV to JSON JSON to CSV YAML Formatter XML Formatter SQL Formatter HTML Formatter CSS Formatter JS Formatter Resistor Color Code ASCII Table HTTP Status Codes ZIP Creator URL Parser Semver Comparator CSS Specificity JSON ↔ YAML robots.txt Generator Barcode Generator Aspect Ratio Calculator PX ↔ REM/EM PPI Calculator Type Scale Generator JSON Diff Viewer JSON Path Tester JSON Schema Validator TOML ↔ JSON Converter Env File Editor HTTP Header Analyzer MIME Type Lookup UUID Inspector Keypair Generator SVG Optimizer SVG Rasterizer Screen Ruler chmod Calculator .gitignore Generator Markdown Table Unicode String Escaper Query String Cookies Data URI JSON -> TS Markdown TOC Regex Git Commands SQL JOINs CSV Viewer EditorConfig ARIA Reference Bcrypt Generator Box Drawing Generator Storage Inspector CSS Transform Generator CSS Transition Visualizer CSS Variable Extractor cURL Builder Docker Compose Generator Font Preview GitHub Actions Builder Hex Dump Viewer IPv6 Expander JSON ↔ XML JWT Generator Media Query Builder OAuth PKCE Generator PDF Text Extractor Byte-Size Counter Text Shadow Generator ULID Generator Wi-Fi QR Generator

Image Tools

33 tools

Compress, convert, resize, and edit images locally.

Image Compressor Format Converter Image Resizer Image to Base64 Favicon Generator Meme Generator Image Cropper Image Color Picker Whiteboard EXIF Viewer Color Extractor Image Watermark Image Rotator / Flipper Image Histogram Pixel Art Badge Maker BlurHash Generator Dither Tool Duotone Generator EXIF Remover Halftone Generator Image Border Adder Image Redactor Image Splitter Noise Texture Generator OG Image Generator Particle Playground Photomosaic Generator Posterize Tool QR Code Customizer Signature Pad SVG Path Editor SVG Sprite Generator

Miscellaneous

33 tools

Specialty calculators and small utilities.

Concrete Calculator Paint Calculator Fuel Cost MPG Calculator Notes Typing Speed Test Flashcard Creator Tile Calculator Lumber Calculator Roof Pitch Calculator Wallpaper Calculator Mulch Calculator Gravel Calculator Fence Calculator Drywall Calculator Carpet Calculator Grass Seed Calculator Firewood Calculator Stair Calculator Ramp Slope Calculator Tally Counter Priority Matrix vCard Generator Bracket Generator Chore Chart Day Planner Decision Matrix Kanban Board Meeting Cost Calculator Mind Map Packing List Generator Ranked Choice Calculator Tier List Maker

Science & Engineering

31 tools

Chemistry, physics, and electronics calculators - molar mass, ideal gas law, projectile motion, half-life, LED resistors, voltage dividers, and more. All run in your browser.

Carbon Footprint Molar Mass Molarity Ideal Gas Law Density Projectile Motion Free Fall Wavelength & Frequency Half-Life LED Resistor Voltage Divider Wire Gauge (AWG) Battery Life BTU Calculator Pool Calculator Periodic Table Logic Gates Physics Constants Capacitor Code Decibel Calculator Doppler Calculator Hooke's Law Kinetic Energy Lens Calculator NE555 Calculator Op-Amp Calculator Pendulum Calculator pH Calculator Reynolds Number Snell's Law Specific Heat

Games & Puzzles

41 tools

Word game helpers, dice rollers, score cards, and puzzle tools - all running locally in your browser with no server required.

Sudoku Solver Wordle Helper Scrabble Score Word Unscrambler Crossword Solver Chess Clock D&D Dice Roller Mad Libs Yahtzee Score Card Sudoku Maze Generator Word Search Sliding Puzzle Memory Match 2048 Minesweeper Hangman Tic-Tac-Toe Connect Four Cube Timer Cryptogram Aim Trainer Blind Spot Test Block Stacker Brick Breaker Checkers Game Chess Game Ear Training Game Lights Out Mental Math Quiz N-Back Game Nonogram Puzzle Number Memory Game Pong Game Reaction Time Test Simon Says Snake Game Solitaire Game Stroop Test Whack-a-Mole Word Ladder

Camera, Mic & Media

48 tools

Free, browser-based camera, microphone, and speaker tools - QR/barcode scanners, webcam and screen recorders, mic test, decibel meter, spectrum analyzer, and more. Everything runs on your device and is never uploaded.

QR Code Scanner Barcode Scanner Webcam Test Webcam Mirror Photo Booth Webcam Recorder Screen Recorder Document Scanner Camera Color Picker Camera Heart Rate Motion Detector Teleprompter Microphone Test Decibel Meter Spectrum Analyzer Audio Oscilloscope Voice Recorder Speech to Text Speaker Test Hearing Test Noise Generator Binaural Beats ASCII Art Camera BPM Detector Chord Progressions Chroma Key Tool Circle of Fifths Beat Sequencer DTMF Tone Generator Face Landmark Detector Guitar Chord Diagrams Isochronic Tones Light Meter Photo Filters Pixel Sorter Posture Reminder PD Measurer Music Scale Reference Screen Eyedropper Steganography Tool Stop-Motion Studio Tilt-Shift Effect Time-Lapse Recorder Tinnitus Masker Virtual Background Virtual Piano Vocal Range Finder Voice Changer

Why browser-only?

Most online utility sites send your data to a server to do the work. That's fine for the operator, but it means a third party briefly holds whatever you typed or dropped in. Toolcroft skips that pattern entirely. Each tool is a small JavaScript program that runs on your machine. There is no backend handling your tool data.

Every release is checked by an automated test that fails the build if a tool makes an unexpected network request. The privacy promise is enforced at the build step, not just written on a page.