Free online tools
A growing set of free, no-sign-up tools that run entirely in your browser — nothing to install, nothing uploaded. Built by the team behind SubSpend.
Subscription tools
Get a handle on what you pay for — no sign-up, no bank connection.
Subscription Cost Calculator
Add your subscriptions and see your real monthly and yearly total in seconds.
Try toolMonthly vs Annual Calculator
Compare monthly and annual pricing to see which actually saves you money.
Try toolFree Trial End Date Calculator
Find the exact day a free trial converts to paid — and when to cancel.
Try toolEveryday calculators
Fast, free calculators for the numbers that come up all the time.
Percentage Calculator
Find a percentage of a number, or what % one number is of another.
Try toolDiscount Calculator
See the sale price and how much you save on any discount.
Try toolTip Calculator
Work out the tip, total, and per-person amount on any bill.
Try toolLoan Calculator
Estimate the monthly payment, total interest, and cost of a loan.
Try toolAge Calculator
Find your exact age in years, months, and days from a birth date.
Try toolBMI Calculator
Find your BMI and weight category from height and weight.
Try toolUnit Converter
Convert length, weight, temperature, volume, area, and speed.
Try toolCompound Interest Calculator
Project how savings grow with compound interest and regular deposits.
Try toolCalorie Calculator
Estimate daily calories, BMR, and TDEE for your goals.
Try toolMortgage Calculator
Estimate your monthly mortgage payment, interest, and total cost.
Try toolScientific Calculator
Trig, logs, exponents, roots, and more — a full scientific calculator.
Try toolSales Tax Calculator
Add or remove sales tax / VAT and see the tax amount and total.
Try toolMacro Calculator
Get your daily protein, carb, and fat targets in grams for your goal.
Try toolDate Difference Calculator
Count the days, weeks, months, and business days between two dates.
Try toolTime Zone Converter
Convert a date and time between world time zones, DST-aware.
Try toolFraction Calculator
Add, subtract, multiply, and divide fractions — simplified instantly.
Try toolPregnancy Due Date Calculator
Estimate your due date, trimester dates, and how far along you are.
Try toolDays Until Calculator
Count down the exact days until any date — birthday, deadline, or vacation.
Try toolDate Calculator (Add or Subtract)
Add or subtract days, weeks, months, and years from any date.
Try toolRatio Calculator
Simplify a ratio, solve A:B = C:?, or split a total by any ratio.
Try toolWater Intake Calculator
Estimate your daily water needs from weight, exercise, and climate.
Try toolElectricity Cost Calculator
See what any appliance costs to run per day, month, and year from watts and your kWh rate.
Try toolBody Fat Calculator
Estimate your body fat percentage from tape measurements — no calipers or scans needed.
Try toolBudget Calculator
Split your take-home pay into needs, wants, and savings with the 50/30/20 rule.
Try toolRetirement Savings Calculator
Project your retirement nest egg and the yearly income it could provide.
Try toolHeart Rate Zone Calculator
Find your 5 training zones and your zone 2 range from your age.
Try toolTime Card Calculator
Total your weekly hours worked and pay from clock-in and clock-out times.
Try toolProfit Margin Calculator
Turn cost and price into profit margin, markup, and gross profit instantly.
Try toolAspect Ratio Calculator
Find an image or video's aspect ratio and resize it without stretching.
Try toolPace Calculator
Find your running pace, finish time, or distance — in km or miles.
Try toolGPA Calculator
Add your grades and credits to get your GPA on the 4.0 scale.
Try toolTime Duration Calculator
Find the hours and minutes between any two times or dates.
Try toolGrade Calculator
Weight your assignments, then see what you need on the final.
Try toolTest Grade Calculator
The classic easy grader — questions and wrong answers to a grade.
Try toolText & writing tools
Count, clean, and reformat text in your browser.
Word Counter
Count words, characters, sentences, and reading time as you type.
Try toolCase Converter
Switch text between UPPERCASE, lowercase, Title, and Sentence case.
Try toolSlug Generator
Turn any title into a clean, SEO-friendly URL slug.
Try toolLorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words.
Try toolDeveloper & data tools
Format, encode, and convert data — nothing leaves your device.
JSON Formatter
Beautify, minify, and validate JSON — nothing leaves your browser.
Try toolBase64 Encode / Decode
Encode text to Base64 or decode it back — right in your browser.
Try toolURL Encode / Decode
Percent-encode text for URLs or decode it back to readable text.
Try toolUUID Generator
Generate random v4 UUIDs — one or many, instantly.
Try toolUnix Timestamp Converter
Convert Unix timestamps to dates and back — in seconds or milliseconds.
Try toolRegex Tester
Test regular expressions live with match highlighting and capture groups.
Try toolHash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
Try toolAI Token Cost Calculator
Estimate LLM API costs from token counts and your own per-million prices.
Try toolGenerators
Generate what you need on the spot, securely in your browser.
Password Generator
Generate strong, random passwords with options you control.
Try toolColor Converter
Convert colors between HEX, RGB, and HSL with a live preview.
Try toolCSS Gradient Generator
Build linear or radial CSS gradients and copy the code.
Try toolColor Palette Generator
Build harmonious color palettes from any base color and copy the hex codes.
Try toolColor Contrast Checker
Check a color pair's contrast ratio against WCAG AA and AAA.
Try toolRandom Number Generator
Generate random numbers in any range, with or without duplicates.
Try toolPassword Strength Checker
Test a password's strength, entropy, and estimated crack time — nothing uploaded.
Try toolInvoice Generator
Build a professional invoice and download or print it as a PDF.
Try toolPomodoro Timer
Focus in 25-minute sprints with automatic breaks.
Try toolOnline Stopwatch
Start, pause, and record lap splits down to 1/100th of a second.
Try toolCountdown Timer
Set any duration, hit start, and get an alarm at zero.
Try toolImage tools
Compress and optimize images right in your browser — nothing uploaded.
Image Compressor
Shrink JPG, PNG, and WebP images — quality you control, nothing uploaded.
Try toolImage Resizer
Resize images to any dimensions — aspect ratio locked, nothing uploaded.
Try toolImage Format Converter
Convert images between PNG, JPG, and WebP — quality you control, nothing uploaded.
Try toolImage Cropper
Crop images to any size or ratio by dragging — nothing uploaded.
Try toolReady to take control of your subscriptions?
Track every subscription, catch renewals before they hit, and stop paying for what you don't use — no bank connection required.
- No bank connection required
- No credit card to start
- Works in any country & currency
- Reminders before every charge
- One-time pricing, no recurring fee
- 30-day money-back guarantee