All Tools

Calculate age from date of birth

Calculate the area of rectangles, circles, triangles, and trapezoids with formulas shown.

Convert between sq meters, acres, hectares

Calculate aspect ratios and scale image or video dimensions while maintaining the original ratio. Includes common presets like 16:9, 4:3, and 1:1.

Convert audio files between MP3, WAV, OGG, and FLAC formats quickly and for free.

Calculate mean, median, mode, and range from a list of numbers. Paste or type numbers separated by commas.

Calculate your Body Mass Index

Convert BMP images to JPG quickly and locally.

Convert BMP images to PNG locally in your browser.

Calculate your Basal Metabolic Rate using Harris-Benedict and Mifflin-St Jeor equations.

Generate Code 128, EAN-13, and UPC-A barcodes from any data and download as PNG. No external library required.

Encode or decode Base64 strings

Drag & drop any file to encode it to Base64 and get a ready-to-use data URI. Reverse: paste Base64 to decode and download the original file.

Convert Base64 encoded strings to hexadecimal and back in real time.

Paste a Base64 string and instantly preview the encoded image in your browser. Download the result as a PNG, JPEG, or GIF file.

Paste a Base64-encoded PDF string and download the decoded PDF file instantly—no server, no upload, completely private.

Simple math calculator

Convert between binary, decimal, octal, and hexadecimal number systems instantly.

Convert text to binary and back

Estimate your body fat percentage using the US Navy method.

Calculate your body surface area (BSA) using the Du Bois formula.

Calculate break-even point: fixed costs / (price - variable cost per unit).

Track income vs expenses with category breakdown and surplus/deficit analysis.

Define multiple find-replace pairs and apply them all at once. Supports regex, case sensitivity, and whole word matching. Perfect for repetitive text transformations.