All tools
81 free tools from GetHubApps — calculators, converters, generators and developer utilities. Everything runs in your browser; nothing you type is sent anywhere.
All Free Tools
81 toolsCalculators
Scientific Calculator
Trig, logs, powers, roots and factorials, with memory and calculation history.
Percentage Calculator
Find a percentage of a number, work out a percentage change, or reverse-solve for the total.
Loan EMI Calculator
Estimate your monthly EMI, total interest, and total payment for any loan.
E-Commerce Seller Profit & Fee Calculator
Calculate and compare marketplace referral fees, shipping, GST, and net profit margins across Amazon, Flipkart, and Meesho.
Age Calculator
Calculate exact age in years, months, and days from a date of birth.
Compound Interest Calculator
See how your investment grows over time with compounding returns.
GST & Sales Tax Calculator
Add tax to a price or strip it back out of a tax-inclusive total.
SIP Calculator
See what a monthly SIP or lumpsum investment could grow to over time.
Date Calculator
Count the days between two dates, or add and subtract time from a date.
Tip Calculator & Bill Splitter
Work out the tip and split the bill evenly, down to the cent.
Discount Calculator
Find the sale price and what you actually save — including stacked coupons.
Time Duration Calculator
Hours between two times, minus breaks — or add and subtract time.
Fuel Cost Calculator
Work out what a trip costs in fuel, and split it between passengers.
Aspect Ratio Calculator
Resize while keeping the ratio — with presets for video, social and OG images.
Mortgage Calculator
Estimate your monthly mortgage payment, including taxes, insurance and HOA fees.
Simple Interest Calculator
Work out simple interest and the total payable on a principal, rate and time.
Gold Rate Calculator
Live gold, silver and platinum prices in your currency, with a calculator for any weight and purity.
Jewel Loan Calculator
See how interest on a gold loan grows day by day and month by month, plus your eligible loan amount.
TNEB Bill Calculator
Tamil Nadu electricity bill from units or meter readings, price per unit, and the effect of a tariff hike.
GPA Calculator
Calculate your GPA from course grades and credit hours, on any grading scale.
Fitness
BMI Calculator
Check your body mass index and see which healthy-weight range you fall into.
Gym Workout Planner
Build a routine from 1,324 exercises — pick your muscles, equipment and session length.
Calorie Calculator (TDEE)
Estimate your daily calories for losing, maintaining, or gaining weight.
Food
Fashion
Converters
Unit Converter
Convert between length, weight, temperature, and volume units instantly.
Currency Converter
Convert between world currencies using live exchange rates.
Case Converter
Convert text to uppercase, lowercase, title case, or sentence case.
Number to Words Converter
Spell any number out in words — including cheque-ready currency wording.
Roman Numeral Converter
Convert numbers to Roman numerals and back, with a symbol-by-symbol breakdown.
Time Zone Converter
Compare a time across cities worldwide, with daylight saving handled for you.
Number Base Converter
Convert between binary, octal, decimal, hex and any base from 2 to 36.
Markdown to HTML Converter
Write or paste Markdown and get clean, ready-to-use HTML — with a live preview.
File Size Converter
Convert between bytes, KB, MB, GB and TB — decimal or binary.
Image to Base64 Converter
Convert an image to a Base64 data URI, or decode one back into an image.
Tamil Family Relationship Finder
Chain relations like Wife's Mother's Brother to find what to call them in Tamil, Telugu, Malayalam, Hindi and English.
Generators
Floor Plan Creator & Drawing Tool
Design custom 2D home floor plans based on your plot dimensions. Drag and drop rooms, mark live measurements, and calculate area in real time.
QR Code Generator
Turn any link or text into a downloadable QR code in seconds.
Password Generator
Create strong, random passwords with custom length and character rules.
AI Resume Editor & Builder
Create, edit, and optimize ATS-friendly resumes with AI suggestions, auto-fix, photo upload, customizable themes, and private browser storage.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words.
UUID Generator
Generate UUID v4, sortable UUID v7, or short Nano IDs in bulk.
Random Name Generator
Generate random names for people, usernames, or teams — one or a hundred at a time.
Color Palette Generator
Generate complementary, analogous, triadic, and monochromatic palettes from any colour.
Files
PDF Merger
Combine multiple PDF files into one document, in any order you choose.
Image Resizer & Compressor
Resize images by dimension or percentage and compress them to PNG, JPEG or WebP.
Instagram Image Resizer
Fit any photo to Instagram's post or story size — no cropping, with a colour or blurred background.
Image Color Palette Extractor
Pick exact pixel colours from a photo and pull out its dominant colour palette.
CSV Merger
Combine multiple CSV files into one, matching columns by header name.
Developer
JSON Formatter
Format, validate, and beautify messy JSON with one click.
Text Diff Checker
Compare two versions of text or code and see exactly what changed.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
Unix Timestamp Converter
Convert epoch timestamps to readable dates — and any date back to a timestamp.
Color Converter & Picker
Convert between HEX, RGB, HSL and CMYK, with shades and WCAG contrast checks.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 digests from any text.
URL Encoder / Decoder
Percent-encode or decode URLs, and inspect every part of a query string.
JWT Decoder
Read the header, payload and claims inside any JSON Web Token.
CSV to JSON Converter
Convert CSV to JSON and back, with quoted fields handled properly.
HTML Entity Encoder / Decoder
Escape text for safe HTML, or decode entities back to readable characters.
Cron Expression Parser
Turn a cron expression into plain English — and check it is valid.
Text Line Toolkit
Sort lines, remove duplicates, number them, and top and tail every line.
CSS Gradient Generator
Build linear and radial CSS gradients visually and copy the code.
YAML to JSON Converter
Convert YAML to JSON and back, with indentation and lists handled for you.
HTTP Status Code Lookup
Look up any HTTP status code — what it means and when servers send it.
SEO
Word & Character Counter
Count words, characters, sentences, and reading time as you type.
Meta Tag Generator
Generate SEO and Open Graph meta tags for any page in seconds.
UTM Campaign URL Builder
Tag your links so analytics knows exactly where each visitor came from.
URL Slug Generator
Turn headlines into clean, SEO-friendly URL slugs — one at a time or in bulk.
Robots.txt Generator
Build a valid robots.txt, including opting out of AI training crawlers.
XML Sitemap Generator
Turn a list of URLs into a valid XML sitemap, ready to submit to search engines.
Fun
Dice Roller & Coin Flip
Roll any dice from d4 to d100, or flip a coin — no physical dice needed.
Random Decision Wheel
Can't decide? Spin the wheel and let it pick for you.
Magic 8-Ball
Ask a yes-or-no question and let the magic 8-ball decide.
Rock Paper Scissors
Play rock, paper, scissors against the computer and keep score.
Tic-Tac-Toe
Play tic-tac-toe against a friend or the computer, right in your browser.
Chess
Play a full game of chess against the computer or a friend, right in your browser.
Guess the Number
The computer picks a secret number — guess it in as few tries as you can.
Reaction Time Test
Click as soon as the screen turns green and see how fast your reflexes are.
Would You Rather Generator
Get a random tough choice between two options — great for icebreakers.
Baby Keyboard Lock
Hand the keyboard to your baby — Play Mode for pure colour and sound, or Learn, Word, Read and Quiz modes for letters, numbers and spoken words, full-screen and locked down.