Free online tools
Fast, private, no signup — every tool runs right in your browser.
Popular
Workflows
Image Compressor
Compress JPG, PNG & WebP online — free, no signup.
Password Generator
Create strong, random passwords instantly.
Word Counter
Count words, characters, sentences & reading time.
Tip Calculator
Calculate tips and split the bill instantly.
Unit Converter
Convert length, weight, volume & temperature.
Percentage Calculator
Percentages, discounts & percent change.
Case Converter
Change text to UPPER, lower, Title & more.
2FA Code Generator
TOTP authenticator codes — 100% local & private.
QR Code Generator
Create QR codes for links, text, Wi-Fi & more.
Base64 Encode / Decode
Encode and decode Base64 text instantly.
JSON Formatter
Format, validate & minify JSON.
UUID Generator
Generate random UUID v4 identifiers.
Salary Calculator
Convert hourly wage to annual salary and back.
Sales Tax Calculator
Add or remove sales tax from any amount.
Loan Calculator
Estimate monthly loan & mortgage payments.
Color Converter
Convert between HEX, RGB and HSL.
Timestamp Converter
Convert Unix timestamps to human dates.
Hash Generator
SHA-1, SHA-256 and SHA-512 hashes.
URL Encoder / Decoder
Percent-encode and decode URLs.
JWT Decoder
Decode JWT header and payload.
Lorem Ipsum Generator
Generate placeholder text fast.
BMI Calculator
Body Mass Index, metric or imperial.
Age Calculator
Exact age in years, months & days.
Random Number Generator
Random integers in any range.
Slug Generator
Turn text into clean URL slugs.
Number Base Converter
Convert binary, octal, decimal & hex.
CSV to JSON
Convert CSV data to JSON and back.
Text Diff Checker
Compare two texts and see changes.
BMR & Calorie Calculator
Basal metabolic rate & daily calories.
Aspect Ratio Calculator
Keep proportions when resizing.
Roman Numeral Converter
Convert numbers to Roman numerals.
Markdown Preview
Write Markdown, see it rendered live.
Countdown Timer
Simple countdown with alert.
Average Calculator
Mean, median, sum, min and max.
Compound Interest Calculator
Grow savings with compound interest.
GPA Calculator
Weighted GPA from grades and credits.
Final Grade Calculator
Score needed on your final exam.
Date Difference Calculator
Days between two dates.
Cooking Converter
Cups, tbsp, tsp, ml & fl oz.
Remove Duplicate Lines
Delete repeated lines from text.
Text Sorter
Sort lines A-Z, Z-A or by length.
Password Strength Checker
Estimate password strength & entropy.
Color Contrast Checker
WCAG contrast ratio for two colors.
Discount Calculator
Final price and how much you save.
Profit Margin Calculator
Profit, margin and markup from cost & price.
Ideal Weight Calculator
Healthy weight range for your height.
Fuel Cost Calculator
Estimate the fuel cost of a trip.
Pace Calculator
Running pace, speed and time.
Regex Tester
Test regular expressions live.
HTML Entity Encoder / Decoder
Encode and decode HTML entities.
Text Repeater
Repeat text any number of times.
Reverse Text
Reverse characters, words or lines.
Number to Words
Write numbers in English words.
VAT Calculator
Add or remove VAT at any rate.
EMI Calculator
Monthly loan EMI, interest & total.
Pregnancy Due Date Calculator
Estimate your baby's due date.
Work Hours Calculator
Hours worked and pay from a shift.
Time Calculator
Add or subtract hours, minutes, seconds.
Zakat Calculator
2.5% Zakat on your net assets.
Temperature Converter
Celsius, Fahrenheit and Kelvin.
Day of the Week Calculator
Find the weekday of any date.
Credit Card Validator
Check a card number with Luhn.
Electricity Cost Calculator
Running cost of any appliance.
Rent Split Calculator
Split rent fairly between roommates.
Number Formatter
Add thousands separators & decimals.
Body Fat Calculator
Estimate body fat with the Navy method.
Water Intake Calculator
How much water to drink daily.
Savings Goal Calculator
Monthly amount to hit your goal.
Simple Interest Calculator
Interest and total from P, r and t.
GCD & LCM Calculator
Greatest common divisor & LCM.
Word Frequency Counter
Count how often each word appears.
Find and Replace Text
Replace text, with regex option.
Remove Line Breaks
Strip or replace line breaks.
Morse Code Translator
Translate text to Morse and back.
Binary Translator
Convert text to binary and back.
CSS Gradient Generator
Build CSS gradients visually.
UTM Link Builder
Build trackable campaign URLs.
HTTP Status Codes
Look up any HTTP status code.
Scientific Notation Converter
Convert to and from scientific notation.
Data Storage Converter
Bytes, KB, MB, GB, TB and more.
Speed Converter
mph, km/h, m/s, knots.
Area Converter
Sq ft, sq m, acres, hectares.
Angle Converter
Degrees, radians and gradians.
CSS Box Shadow Generator
Design box shadows visually.
Color Shades Generator
Tints and shades of any color.
Random Picker
Pick a random item from a list.
Dice Roller
Roll any number of dice online.
Coin Flip
Flip a virtual coin — heads or tails.
Leap Year Checker
Is a year a leap year?
SIP Calculator
Mutual fund SIP returns & maturity value.
FD Calculator
Fixed deposit maturity & interest.
PPF Calculator
Public Provident Fund growth over 15 years.
GST Calculator
Add or remove GST at any rate.
ROI Calculator
Return on investment & annualized ROI.
Net Worth Calculator
Total assets minus liabilities.
Break-Even Calculator
Units to sell to break even.
Currency Converter
Convert between 150+ world currencies.
Ovulation Calculator
Estimate your fertile window.
Macro Calculator
Daily protein, carbs & fat targets.
Heart Rate Zone Calculator
Target training zones from your age.
Calories Burned Calculator
Estimate calories burned by activity.
Stopwatch
Online stopwatch with laps.
Pomodoro Timer
Focus with 25/5 work-break cycles.
Time Zone Converter
Compare times across cities.
Business Days Calculator
Working days between two dates.
Hijri Date Converter
Convert Gregorian ↔ Islamic dates.
Japanese Era Converter
Convert Gregorian ↔ Japanese era (和暦).
Online Notepad
A quick notepad that auto-saves.
ROT13 & Caesar Cipher
Encode and decode shift ciphers.
NATO Phonetic Alphabet
Spell words with Alpha, Bravo, Charlie.
Fancy Text Generator
Cool Unicode fonts for social media.
Remove Extra Spaces
Trim and collapse extra whitespace.
User Agent Parser
Detect browser, OS and device.
HTML Minifier
Shrink HTML by removing whitespace.
CSS Minifier
Compress CSS by removing whitespace.
Image to Base64
Convert an image to a Base64 data URI.
CPF / CNPJ Validator
Validate Brazilian CPF and CNPJ numbers.
IBAN Validator
Check IBAN checksum and country length.
HRA Calculator
House Rent Allowance exemption (India).
Gratuity Calculator
End-of-service gratuity (India & UAE).
THR Calculator
Tunjangan Hari Raya allowance (Indonesia).
Scientific Calculator
Trig, logs, powers & roots online.
13th Month Salary Calculator
Pro-rated 13th salary / aguinaldo.
401(k) Calculator
Project US retirement savings growth.
Fraction Calculator
Add, subtract, multiply & divide fractions.
To-Do List
A private to-do list that auto-saves.
Sleep Calculator
Best bedtime & wake-up times.
Image Resizer
Resize images by width, height or ratio.
Typing Speed Test
Measure your typing speed in WPM.
Alarm Clock
Set an online alarm with a sound.
Monthly Calendar
Browse & print any month.
Habit Tracker
Track daily habits & streaks.
Event Countdown
Live countdown to any date.
Emoji Picker
Browse & copy emojis and symbols.
Meeting Cost Calculator
See what a meeting really costs.
Invoice Generator
Free invoice & quote maker (print/PDF).
Wi-Fi QR Code Generator
Let guests scan to join your Wi-Fi.
Text to Speech
Read any text aloud with browser voices.
Expense Tracker
Log daily spending, see totals by category.
Unit Price Calculator
Compare price per unit to find deals.
Text Encrypt / Decrypt
Password-protect text with AES-256.
Cron Expression Parser
Explain cron & see the next runs.
Wheel Spinner
Spin a wheel to pick a random winner.
Random Group Generator
Split a list of names into random teams.
Subscription Cost Calculator
Add up what your subscriptions really cost.
Readability Score Checker
Flesch reading ease & grade level.
ISBN Validator
Check ISBN-10 and ISBN-13 check digits.
GSTIN Validator
Validate an Indian GST number & checksum.
Chile RUT Validator
Validate a Chilean RUT/RUN check digit.
Mexico CURP Validator
Validate a Mexican CURP & check digit.
Mexico RFC Validator
Validate a Mexican RFC structure.
Argentina CUIT / CUIL Validator
Validate a CUIT/CUIL check digit.
South Africa ID Validator
Validate a South African ID number.
Poland PESEL Validator
Validate a Polish PESEL check digit.
Image Cropper
Crop images online to any size.
Image Format Converter
Convert between JPG, PNG and WebP.
HEIC to JPG
Convert iPhone HEIC photos to JPG — free, private.
Image Watermark
Add a text watermark to images.
Citation Generator
APA, MLA & Chicago citations.
Dimensional Weight Calculator
Volumetric & billable shipping weight.
Clothing Size Converter
US, UK, EU & IT clothing sizes.
Shoe Size Converter
US, UK, EU & CM shoe sizes.
BAC Calculator
Estimate blood alcohol content.
Plug & Voltage Guide
Plug types & voltage by country.
CIDR Subnet Calculator
IPv4 network, mask & host range.
SQL Formatter
Format & beautify SQL queries.
Spain DNI / NIE Validator
Validate a Spanish DNI or NIE.
France SIREN / SIRET Validator
Validate a French SIREN or SIRET.
Italy Codice Fiscale Validator
Validate an Italian Codice Fiscale.
PX to REM Converter
Convert px ↔ rem for CSS.
Chmod Calculator
Unix file permissions (octal ↔ rwx).
JSON Diff Checker
Compare two JSON objects by key.
Color Palette Generator
Harmonious color schemes from a base.
CSS Flexbox Generator
Build flex layouts visually.
Fuel Efficiency Converter
MPG, L/100km and km/L.
Ring Size Converter
US, UK, EU, JP & mm ring sizes.
Paint Calculator
How much paint do you need?
Singapore NRIC / FIN Validator
Validate a Singapore NRIC or FIN.
Australia ABN Validator
Validate an Australian ABN.
Image Color Picker
Pick HEX colors from an image.
CSS Grid Generator
Build CSS grid layouts visually.
Tile Calculator
How many tiles do you need?
Concrete Calculator
Concrete volume and bags.
Tire Size Calculator
Tire diameter & circumference.
Syllable Counter
Count syllables in English text.
MAC Address Generator
Random MAC addresses for testing.
Japan My Number Validator
Validate a Japanese My Number.
Thailand National ID Validator
Validate a Thai national ID number.
Barcode Validator (EAN-13 / UPC-A)
Validate EAN-13 and UPC-A barcodes.
Pressure Converter
Pa, bar, psi, atm & mmHg.
Energy Converter
Joule, calorie, Wh & kWh.
Power Converter
Watt, kW, hp & PS.
Query String Parser
URL query string to JSON.
ASCII / Unicode Lookup
Characters to code points.
Remove Accents
Strip diacritics from text.
Fence Calculator
Posts and panels needed.
India PAN Validator
Validate an Indian PAN format.
Germany Steuer-ID Validator
Validate a German tax ID.
ISIN Validator
Validate a securities ISIN.
Image to PDF
Convert JPG/PNG images to a PDF.
PDF to JPG
Convert PDF pages to images.
Compress PDF
Shrink PDF file size — free, private, no upload.
Merge PDF
Combine multiple PDFs into one.
Split PDF
Extract pages from a PDF.
Rotate PDF
Rotate PDF pages 90/180/270°.
PDF Watermark
Stamp text across every PDF page.
PDF Page Numbers
Add page numbers to a PDF.
QR Code Scanner
Read a QR code from an image.
Round Image Corners
Rounded corners or a perfect circle avatar.
Rotate & Flip Image
Rotate, mirror or straighten a photo.
Add Border to Image
White, black or polaroid photo frames.
Blur / Pixelate Image
Censor screenshots — blur or mosaic any area.
SVG to PNG
Vector in, crisp pixels out — at any scale.
Favicon Generator
Any image or letter → full favicon pack.
Screenshot Beautifier
Rounded corners, shadow, any background — or none.
Add Text to Image
Captions, memes and labels — drag into place.
EXIF Viewer & Remover
See what your photo reveals — then strip it.
Image Splitter
Cut one photo into a 3×3 Instagram grid.
One Rep Max Calculator
Estimate 1RM and training percentages.
Barbell Plate Calculator
Load plates for any target weight.
Training Volume Calculator
Sets × reps × weight, by muscle group.
Race Time Predictor
Predict 5K to marathon from a recent race.
VDOT Calculator
Jack Daniels training paces from a race.
Swim Pace Calculator
Pool pace, splits and CSS estimate.
Cycling FTP Calculator
FTP estimate and Coggan power zones.
HIIT Timer
Tabata, EMOM and custom interval timer.
VO2 Max Calculator
Estimate VO2max from a run or heart rate.
Protein Intake Calculator
Daily protein grams by goal and training.
Running Cadence Metronome
Audible steps-per-minute trainer.