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Every tool you need,
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ToolStack is a collection of 108 free online tools covering finance, health, mental wellbeing, productivity, PDF editing, and more — all running privately in your browser. No accounts, no paywalls, no tracking.

Browse all 108 tools ↓ About ToolStack
At a glance
108Free tools
8Categories
0Accounts needed
100%Browser-based
No signup No ads No downloads Private
Browse by category
💰
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Finance & Business
Budgets, mortgages, tax, invoices & FIRE planning
24 TOOLS
💪
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Health & Fitness
BMI, macros, calories, sleep, yoga & body metrics
20 TOOLS
🧠
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Mental Health
Journals, mood tracking, breathing & CBT tools
17 TOOLS
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Home & Family
Meal plans, chores, grocery lists & family budget
5 TOOLS
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PDF Tools
Merge, split, rotate, extract & convert PDFs
6 TOOLS
🖥️
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Developer
CSS generators, colour picker, JSON & converters
6 TOOLS
⏱️
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Productivity
Pomodoro, countdowns, meeting cost & grades
4 TOOLS
⚡
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Utilities
Unit converters, calculators, QR codes & more
14 TOOLS
Search all tools
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💰 Finance & Business · 24 tools
View hub →
FIRE & Financial Independence
🔥
FIRE Calculator
Financial independence number, years to retirement, and savings milestones
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📊
Savings Rate Calculator
Your savings rate and how it affects years to financial independence
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🌴
Retirement Calculator
Nest egg projections and on-track check for comfortable retirement
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📈
Compound Interest Calculator
Investment growth with reinvested returns and additional contributions
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Budgeting & Savings
📋
Budget Planner
Monthly income vs expenses breakdown with savings tracking
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🎯
Savings Goal Calculator
Time and contributions needed to reach any savings target
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💎
Net Worth Calculator
Assets minus liabilities — know exactly where you stand
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🏦
Debt Payoff Calculator
Avalanche vs snowball payoff plans with total interest saved
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Loans, Mortgages & Property
🏡
Mortgage Calculator
Monthly payments, amortisation schedule and total interest paid
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💳
Loan Calculator
Monthly repayments and full loan cost for any amount and rate
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🔑
Rent vs Buy Calculator
True cost comparison of renting versus buying a home over time
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Tax & Salary
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Income Tax Calculator
Estimate your tax liability by income bracket and filing status
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⏰
Salary to Hourly Calculator
Convert annual salary to hourly, daily, weekly, and monthly rate
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💵
Net Salary Calculator
Take-home pay after tax, NI, pension and student loan deductions
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Business & Invoicing
📑
Invoice Generator
Professional printable invoices with line items and tax
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📝
Quote & Estimate Generator
Client-ready quotes and estimates with itemised pricing
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Receipt Generator
Printable receipts for cash sales and transactions
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Pay Stub Generator
Employee pay stub with gross pay, deductions and net pay
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⚖️
Break-Even Calculator
Units and revenue needed to cover fixed and variable costs
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📉
Profit Margin Calculator
Gross and net margins from revenue and cost figures
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🕐
Hourly Rate Calculator
Freelance and consultant rate based on income goals and hours
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VAT Calculator
Add or remove VAT at any rate including reverse calculation
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💱
Currency Converter
Live exchange rates between major world currencies
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🌍
Time Zone Converter
Convert times across world time zones for scheduling
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🍽️
Bill Split Calculator
Split bills equally, by percentage, or by individual items
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More Finance Tools
🏠
Mortgage Overpayment Calculator
See how much interest and years you save by overpaying your mortgage
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💼
Freelance Project Estimator
Break work into tasks, set your rate, and get a professional quote range
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🏦
Loan Eligibility Estimator
Estimate how much you could borrow based on income, debts and credit score
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📊
Net Worth Tracker
Log assets and liabilities, save monthly snapshots and chart your wealth over time
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📋
Invoice Template Generator
Build professional invoices with live preview and one-click print to PDF
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💪 Health & Fitness · 20 tools
View hub →
Body Metrics
⚖️
BMI Calculator
Body Mass Index with healthy weight range guidance
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🔥
TDEE Calculator
Total daily energy expenditure based on activity level
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🥗
Macro Calculator
Protein, carb and fat targets for your goals and activity
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📉
Calorie Deficit Calculator
Daily calorie deficit needed to reach your target weight
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🏃
Calorie Burn Calculator
Calories burned by 50+ activities using MET values
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🎯
Ideal Weight Calculator
Healthy weight range estimates using multiple formulas
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📏
Body Fat Calculator
Estimated body fat percentage from measurements
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📅
Ovulation Calculator
Fertile window and ovulation dates from your cycle length
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🤰
Due Date Calculator
Pregnancy due date, trimester milestones and key dates
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Performance, Sleep & Habits
🏋️
One Rep Max Calculator
Estimated 1RM from reps and weight using multiple formulas
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👟
Running Pace Calculator
Pace, time, and distance calculations for any run
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💧
Water Intake Calculator
Daily hydration target based on weight and activity level
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😴
Sleep Calculator
Optimal bedtimes based on sleep cycles and wake time
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📓
Mood & Sleep Tracker
Daily log of mood, sleep quality and wellbeing patterns
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✅
Habit Tracker
Build streaks and consistency for any daily habit
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🌬️
Breathing Exercise Timer
Timed breathing patterns for relaxation and focus
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Yoga
🧘
Beginner Yoga Guide
Foundational poses and sequences for yoga beginners
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🤸
Yoga Flexibility Tracker
Track flexibility progress with targeted stretch routines
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🌿
Yoga Sequence Builder
Build and save custom yoga sequences for any level
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More Health Tools
📐
Body Shape Calculator
Find your body type from measurements with style and fitness tips
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💊
Vitamin & Supplement Tracker
Log daily supplements, track streaks and stay consistent
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🥗
Food & Calorie Diary
Log meals, track calories and macros with a built-in food database
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🧠 Mental Health · 17 tools
View hub →
Everyday Wellbeing
🌸
Gratitude Journal
Daily guided gratitude prompts to build a positive mindset
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💆
Self-Care Checklist
Daily and weekly self-care habits to maintain wellbeing
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🕯️
Meditation Timer
Customisable timer with bells for guided meditation sessions
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🌙
Sleep Noise Generator
White, pink, brown and rain noise for better sleep
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Stress, Anxiety & Mood
😮‍💨
Guided Breathing Tool
Box breathing and 4-7-8 techniques for instant calm
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📊
Stress Tracker
Log daily stress levels and identify triggers over time
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✍️
Anxiety Journal
Structured prompts to process and reduce anxious thoughts
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🌊
Panic Grounding Tool
5-4-3-2-1 technique to interrupt panic attacks
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🎭
Mood & Anxiety Journal
Daily mood rating and journalling to track emotional patterns
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👥
Social Anxiety Journal
Reflect on social situations and challenge anxious thoughts
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🌋
Anger Journal
Process anger constructively with guided reflection prompts
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🧩
CBT Thought Record
Cognitive behavioural therapy worksheet to reframe thoughts
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Assessments & Recovery
😮
Burnout Self-Assessment
Identify early signs of burnout and get recovery guidance
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🎯
ADHD Self-Screener
Informal ADHD symptom checklist — not a clinical diagnosis
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💞
Relationship Health Quiz
Reflect on communication, trust and connection
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🏅
Sobriety Tracker
Track sober days, milestones and money saved
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😪
Sleep Debt Tracker
Calculate cumulative sleep debt and recovery schedule
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✨
Journal Prompt Generator
Thoughtful daily prompts for self-reflection, gratitude, anxiety and growth
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📄 PDF Tools · 6 tools
View hub →
📎
Merge PDF
Combine multiple PDF files into a single document
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✂️
Split PDF
Extract pages or split a PDF into separate files
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🗑️
Remove PDF Pages
Delete specific pages from any PDF file
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🔄
Rotate PDF
Rotate pages in a PDF by 90, 180, or 270 degrees
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📝
PDF to Text
Extract plain text content from any PDF document
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🖼️
Image to PDF
Convert JPG, PNG, or WebP images into a PDF file
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🏠 Home & Family · 5 tools
View hub →
🍽️
Meal Planner
Weekly meal planning grid with grocery list generation
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🛒
Grocery List
Organised shopping list by aisle with quantity tracking
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🧹
Chore Chart
Assign and track household chores for the whole family
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🔧
Home Maintenance Tracker
Schedule and log home maintenance tasks and reminders
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👨‍👩‍👧
Family Budget Planner
Household income, shared expenses and savings goals
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📅
Chore Rota Generator
Generate a fair rotating chore schedule for your whole household
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🖥️ Developer · 6 tools
🎨
CSS Gradient Generator
Visual gradient builder with live CSS code output
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🖌️
Colour Picker
Pick colours and get HEX, RGB, HSL, and CSS values
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🪟
Box Shadow Generator
Visual CSS box-shadow builder with live preview
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{ }
JSON Formatter
Format, validate and minify JSON with syntax highlighting
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🔢
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal
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Aa
Text Case Converter
Convert text to UPPER, lower, Title, camelCase, snake_case
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🎨
Colour Contrast Checker
Check WCAG AA and AAA contrast ratios for accessible design
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.*
Regex Tester
Live regular expression tester with match highlighting and group capture
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⏱️ Productivity · 4 tools
🍅
Pomodoro Timer
Focus timer with work and break intervals for deep work
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⏳
Countdown Timer
Count down to any date, event, or deadline
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💸
Meeting Cost Calculator
Real-time dollar cost of a meeting based on attendee salaries
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🎓
Grade Calculator
Weighted grade calculator for assignments, tests, and courses
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📄
Resume Bullet Generator
Build punchy action-driven CV bullets using the XYZ formula
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⚡ Utilities · 14 tools
🍴
Tip Calculator
Calculate tip amount and total per person for any bill
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%
Percentage Calculator
Percentages, increases, decreases, and percentage-of calculations
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📐
Unit Converter
Length, weight, volume, temperature and more
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📅
Date Calculator
Days between dates, add or subtract days, find day of week
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🎂
Age Calculator
Exact age in years, months, and days from date of birth
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🔬
Scientific Calculator
Full scientific calculator with trig, log, and advanced functions
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🎲
Random Number Generator
Generate random numbers within any range with options
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📱
QR Code Generator
Generate QR codes for any URL, text, or contact info
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🔐
Password Generator
Strong random passwords with length and character options
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📄
Word Counter
Word, character, sentence, and paragraph count with reading time
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🔤
Character Counter
Character count with Twitter, SMS, and platform limits
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📖
Readability Checker
Flesch-Kincaid and other readability scores for any text
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🏛️
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers
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🎂
Anniversary & Birthday Countdown
Add special dates and get live countdowns with streak tracking
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