Token counter
Count tokens for AI models, with a real tokenizer
All tools
71 free tools that run in your browser, sorted by what they do.
AI 7
Prompt cost estimator
Estimate what AI API calls will cost
LLM latency calculator
Estimate how long an AI response takes
System prompt builder
Build a clear system prompt, section by section
AI image prompt formatter
Turn your idea into a tidy image prompt
Readability checker
See how easy your text is to read
Tokens per second visualizer
See how fast an AI model writes at any speed
Finance 11
GST calculator
Add or remove GST at the current rates
EMI calculator
Work out your monthly loan payment and total interest
Loan calculator
Work out loan payments and what extra payments save
Mortgage calculator
Work out your monthly mortgage payment
Compound interest calculator
See how money grows with compound interest
SIP calculator
Estimate what a monthly investment could grow to
FD calculator
Work out the maturity amount of a fixed deposit
PPF calculator
Work out the maturity amount of a PPF account
Inflation calculator
See what money will cost and buy in the future
Discount calculator
Work out the sale price and how much you save
Tip calculator
Work out a tip and split the bill
Health 3
BMI calculator
Work out your body mass index, with Asian cut-offs
BMR calculator
Estimate how much energy your body uses at rest
Calorie calculator
Estimate how many calories you need each day
Maths 5
Percentage calculator
Six everyday percentage sums, all on one page
Unit price calculator
Compare pack sizes to find the best value
Roman numeral converter
Convert between numbers and Roman numerals
Number to words converter
Write a number in words, in lakh and crore or millions
Random number generator
Pick random numbers, with or without repeats
Date and time 7
Age calculator
Work out your exact age in years, months and days
Date difference calculator
Count the days, weeks and working days between dates
Date add and subtract calculator
Add or subtract days, weeks, months or years from a date
Time zone converter
Convert a time between time zones
Working days calculator
Count working days between two dates
Week number calculator
Find the ISO week number of any date
Countdown timer
Count down to any date, and share it
Converters 8
Length converter
Convert between metric and imperial lengths
Weight converter
Convert between kilograms, pounds, ounces and more
Volume converter
Convert litres, gallons, cups and more, US and UK
Area converter
Convert square feet, square metres, acres and more
Speed converter
Convert km/h, mph, knots and metres per second
Energy converter
Convert joules, calories, kilowatt-hours and more
Temperature converter
Convert between Celsius, Fahrenheit and Kelvin
Data storage converter
Convert bytes, MB, GB and TB, decimal and binary
Text 9
Word counter
Count words, characters, sentences and reading time
Case converter
Change text to upper, lower, title or sentence case
Text reverser
Reverse letters, words or lines
Lorem ipsum generator
Make placeholder text for designs and mock-ups
Fancy text generator
Turn text into bold, italic, cursive and other styles
Text diff
Compare two texts and see what changed
Remove line breaks
Join broken lines into clean paragraphs
Remove duplicate lines
Clean a list by removing repeated lines
Find and replace
Replace words in text, with optional regex
Developer 12
JSON formatter
Format and check JSON without changing your data
Unix timestamp converter
Convert Unix timestamps to dates
Base64 encoder and decoder
Encode and decode Base64, with full UTF-8 support
URL encoder and decoder
Encode and decode URLs and read query strings
HTML entity encoder
Encode and decode HTML entities
YAML to JSON converter
Convert between YAML and JSON both ways
JWT decoder
Read a JSON Web Token without sending it anywhere
Regex tester
Test regular expressions with live highlights
UUID generator
Make v4 and v7 UUIDs in your browser
CSV to JSON converter
Convert between CSV and JSON both ways
Cron expression explainer
Read a cron expression in plain English
Unicode escape converter
Convert text to and from \uXXXX escapes
Security 3
Password generator
Make a strong random password in your browser
Password strength checker
See how hard a password is to crack
Hash generator
Make MD5 and SHA hashes, and compare them
Creator and SEO 6
QR code generator
Make a QR code for a link or text
Social character counter
Check your post against each network’s limit
Read time estimator
Estimate reading and speaking time
Engagement rate calculator
Work out your social media engagement rate
Slug generator
Turn a title into a clean URL slug
Color converter
Convert colours between HEX, RGB, HSL and more
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Free online tools for everyday jobs
QuickToolz has 71 free online tools: calculators for GST, EMIs and loans, unit converters, word counters, JSON formatters, password generators and AI token counters. Each one gives you the answer straight away and shows how it got there.
Are QuickToolz tools really free?
Yes. Every tool is free to use, with no sign-up and no limit on how often you use it.
Do I need to install anything?
No. Every tool runs in your web browser, on a phone or a computer.
Is what I type private?
Yes. The tools work in your browser, so your numbers and text stay on your device.
How accurate are the results?
Results show up to two decimal places, and each tool explains its formula. We check tools against published sources, and our finance and health tools are reviewed by a named person.
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