Free · No sign-up · Runs in your browser
UNSEEN OFFERS — Simple tools for everyday tasks.
UNSEEN OFFERS is a free collection of fast, browser-based tools for the calculations and small tasks you run into every day — discounts and sale prices, percentages and profit margins, dates and times, unit conversions, text helpers, generators and developer utilities. Every tool works instantly, with no signup and nothing to install.
73 tools, 8 categories
Calculators, converters, timers, text and developer tools in one place.
Instant results
Tools run in your browser and respond the moment you type — no waiting, no page reloads.
Private by default
Most tools process your inputs on your device. Nothing you type is sent to a server unless a tool says so.
Free, no signup
Every tool is free to use for personal and commercial work. No account, no paywall, no clutter.
8 categories
Browse by category
Pick a category to explore every tool inside.
Shopping
Calculate discounts, sale prices, savings and unit costs before you buy.
7 toolsFinance
Percentages, profit margins, taxes, VAT and loan payments in seconds.
12 toolsDate & Time
Age, date differences, countdowns, time zones and business days.
11 toolsMath
Basic and scientific calculators, fractions, ratios, GCD and LCM.
8 toolsConverters
Convert length, weight, temperature, area, volume, speed and more.
12 toolsText
Count words, change case, sort lines, generate slugs and clean up text.
8 toolsGenerators
Passwords, QR codes, UUIDs, usernames, colors and hashes on demand.
8 toolsDeveloper
Format and validate JSON, Base64, URLs, JWTs, timestamps and regex.
10 toolsMost used
Popular tools
Start with the ones people reach for most.
Discount Calculator
Calculate the final price after a percentage discount and see how much you save.
Open toolUnit Price Calculator
Compare prices per unit (per kg, per litre, per item) to find the best value.
Open toolPercentage Calculator
Calculate a percentage of a number, and the percentage one number is of another.
Open toolVAT Calculator
Add or remove VAT from a price using any VAT rate.
Open toolLoan Calculator
Calculate monthly loan payments and total interest from amount, rate and term.
Open toolAge Calculator
Calculate exact age in years, months and days from a birth date.
Open toolBasic Calculator
A simple calculator for addition, subtraction, multiplication and division.
Open toolLength Converter
Convert between metres, kilometres, miles, feet, inches and more.
Open toolTemperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Open toolThe two-minute version
How it works
01
Pick a tool
Search for what you need or open a category. Every tool has its own page with a short explanation.
02
Type your numbers
Results update as you type. Nothing is uploaded: the calculation happens in your browser.
03
Copy the result
Copy the answer in one click, and use the formula and worked examples on the page to check it.
Quick links
What people use most
Jump straight to the calculator, converter or generator you came for.
- Countdown timer
1 to 60 minute timer with alarm, or count down to New Year
- Military time converter
24-hour to 12-hour AM/PM and back, with a full chart
- Random number generator 1-10
Quick ranges 1-4, 1-10, 1-100, or any range you set
- Mixed fraction calculator
Fractions, mixed numbers and whole numbers, simplified
- Tax and bonus calculator
22% federal, Social Security, Medicare and state
- Income tax calculator Nevada
No state income tax: 2026 federal tax and take-home pay
- CA income tax calculator
2026 California and federal tax, SDI and paychecks
- EST to CST converter
Eastern to Central Time, always 1 hour behind
- GMT to Eastern time converter
5 hours behind in winter, 4 in summer
- Convert time to decimal
7 h 45 min = 7.75 hours, for timesheets
- Online Base64 decoder tool
Decode Base64 to readable UTF-8 text
- Instagram and TikTok username generator
Aesthetic, TikTok, gamer and Japanese styles
- Wedding color palette generator
Sage and blush, dusty blue, burgundy and gold
- Unit price calculator
Price per ounce, pound, kg or item
- Profit margin calculator
Gross profit and margin from revenue and cost
- How long will my savings last
Years of withdrawals with returns and inflation
- Online character count
With and without spaces, words and lines
- Time zone converter
Convert time zones worldwide with daylight saving
From the blog
Latest guides
Short, practical answers to real questions — each linked to a free tool.
Guide
How Do You Show the Word Count on Google Docs?
Find the word count in Google Docs from the Tools menu or with Ctrl + Shift + C, keep a live counter on screen while you type, and count only part of a document.
Read the guideGuide
How Do You Calculate Gross Profit?
Gross profit is revenue minus the cost of goods sold. The formula, worked examples for a shop and a service business, gross margin and the mistakes to avoid.
Read the guideGuide
How Do You Read and Convert Military Time?
Military time counts the hours from 00 to 23. The two conversion rules, a full chart, how to pronounce it and what happens at midnight.
Read the guideFAQ
Frequently asked questions
Are the tools on UNSEEN OFFERS free?
Yes. Every calculator, converter and generator is free for personal and commercial use, with no account and no download.
Is my data safe?
The tools run in your browser. What you type into a calculator, a text tool or a decoder is processed on your device and is not sent to a server.
How accurate are the calculators?
They use exact unit definitions, the IANA time zone database and the official 2026 IRS and California tax figures. Each page shows the formula and worked examples so you can check the result.
Do the tools work on phones?
Yes. Every page is built for small screens and works in any modern mobile browser.
Every tool, one place.
73 free tools across 8 categories. No account, no download, nothing to install.
Browse all tools