All the tools you need,
perfectly calibrated.

Calculate Compound Annual Growth Rate for investments over time.

Visualize how your money grows over time with the power of compound interest. Calculate savings goals and investment returns.

Calculate your monthly payments, total interest, and overall loan cost.

Free mortgage amortization calculator with full monthly schedule, interest breakdown, and extra payment options. Download your amortization table as CSV or Excel instantly.

Calculate Return on Investment (ROI) to measure profitability.

Calculate the percentage gain required to recover from a stock market loss and visualize the mathematical asymmetry.

Convert numbers between Binary, Octal, Decimal, and Hexadecimal systems.

Calculate the power of a number. Raise a base to an exponent (x^y).

Calculate logarithms with any base. Solve for log_b(x) instantly.

Free online percentage calculator with step-by-step solutions. Calculate percentage of a number, percentage increase or decrease, reverse percentage from final value, and find original price before discount. Instant results with formula breakdown.

Convert numbers to scientific notation and round to significant figures.

Find the square root, cube root, or any nth root of a number.

Calculate the number of significant figures in any number.

Professional AES-256 symmetric encryption and decryption utility using secret passphrases.

Process text into Base64 format and decode encoded strings back to UTF-8.

Generate and verify cryptographically secure bcrypt hashes with custom salt rounds.

Generate SHA-256, SHA-512, SHA-3, MD5 and HMAC message digests instantly.

Decode JSON Web Tokens (JWT) to view header, payload, and data claims without sharing your secret.

Quickly generate 128-bit MD5 hashes for simple checksums and legacy data verification.

Generate human-readable but highly secure passphrases using the Diceware method.

Free and fast online URL encoder & decoder tool. Safely percent-encode special characters like $ to %24 for URIs, APIs, and web development.

Generate high-entropy, cryptographically secure random passwords and secrets for your applications.

Generate secure 256-bit SHA-2 cryptographic hashes for text and sensitive data verification.

Free online JSON formatter with pretty print, line numbers, dark mode, and large file support. Beautify, validate, and minify JSON instantly — no limits, no signup.

Free QR code generator — create QR codes for URLs, Wi-Fi, email, phone, and SMS. Custom colors, high-resolution PNG & SVG download. No signup, no watermark, works offline in your browser.

Automatically fix invalid JSON online. Repairs trailing commas, single quotes, Python True/False/None, unquoted keys, JS comments, and more. Free, instant, no signup.

Validate JSON online free. Instantly check syntax errors with exact line and column numbers, get fix hints for common mistakes, and see a full type breakdown of your JSON structure.

Calculate the distance and slope between two points on a Cartesian plane.

Calculate the missing side of a right triangle. A² + B² = C².

Calculate the volume of various geometric shapes including cubes, cylinders, spheres, and cones.

Calculate Density, Mass, or Volume. rho = m / V.

Solve SUVAT equations for constant acceleration motion.

Calculate Voltage, Current, or Resistance. V = I * R.

Calculate range, max height, and flight time of a projectile.

Calculate mean, median, mode, range, and more from a list of numbers instantly.

Explore Normal (Gaussian) and Binomial probability distributions.

Calculate Permutations (nPr) and Combinations (nCr). Understand the difference between ordered arrangements and selections.

Convert between Length, Mass, Temperature, Time, Area, Volume, and Speed units instantly. Supports Metric and Imperial systems.