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