Free Online Calculators & Tools
36 fast, free tools for finance, developers and everyday life. No sign-up. No uploads. Everything runs right in your browser.
All tools
Mortgage Calculator
Estimate your monthly mortgage payment, total interest and payoff schedule.
Loan Calculator
Calculate monthly payments for car loans, personal loans and any installment loan.
Compound Interest Calculator
See how your money grows with compound interest and regular contributions.
VAT Calculator
Add or remove VAT from any price instantly.
Tip Calculator
Split the bill and calculate the perfect tip in seconds.
Investment Calculator
Project portfolio growth with compound returns and monthly investing.
JSON Formatter
Format, validate and minify JSON with precise error location.
Base64 Encoder / Decoder
Encode and decode Base64 strings with full UTF-8 support.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes in your browser.
UUID Generator
Generate random v4 UUIDs — one or in bulk, with one-click copy.
Regex Tester
Test regular expressions live with match highlighting and capture groups.
Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps.
Diff Checker
Compare two texts line by line and highlight every addition and deletion.
Markdown Editor
Write Markdown on the left, see it rendered live on the right.
JWT Decoder
Decode any JSON Web Token to inspect its header, payload and expiry.
URL Encoder / Decoder
Percent-encode or decode URLs and query-string values instantly.
JSON to CSV Converter
Convert JSON arrays to CSV and CSV back to JSON — both directions.
Color Converter
Convert between HEX, RGB, HSL and HSV with live preview and contrast ratios.
Percentage Calculator
X% of Y, what percent X is of Y, and percentage increase/decrease.
Age Calculator
Calculate your exact age in years, months and days from your birth date.
Date Difference Calculator
Days between two dates, plus add or subtract days from any date.
BMI Calculator
Calculate your Body Mass Index with metric or imperial units.
Calorie Calculator
Daily calorie needs with the Mifflin-St Jeor equation and activity level.
Random Number Generator
Random integers in any range — single, bulk, or unique without repeats.
Time Zone Converter
Convert any date and time between world time zones instantly.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.
Countdown Timer
Count down to any date and time with live days, hours, minutes and seconds.
QR Code Generator
Create QR codes for URLs, text or Wi-Fi and download as PNG.
Password Generator
Strong random passwords with custom length and character sets.
Word Counter
Count words, characters, sentences and reading time as you type.
Image Compressor
Compress JPG, PNG and WebP images locally — files never leave your device.
PNG to JPG Converter
Convert PNG images to JPG with custom quality and background color.
Unit Converter
Convert length, weight and temperature units instantly.
Merge PDF
Combine multiple PDF files into one — free, private, in your browser.
Split PDF
Extract pages or page ranges from a PDF into a new file.
Image Resizer
Resize JPG, PNG and WebP images to exact pixels or a percentage.