Everyday tools that get out of your way.

Find a percentage, percentage change, or reverse percentage.

Calculate precise age from a date of birth.

Calculate body mass index using metric or US measurements.

Estimate monthly loan payments and total interest.

Project savings growth with recurring contributions.

Split a bill and calculate a fair tip in seconds.

Convert length and weight units.

Convert Celsius, Fahrenheit and Kelvin precisely.

Count words, characters, sentences and reading time.

Count characters with and without spaces, plus words and lines.

Format, minify and validate JSON with useful errors.

Use JSON Validator locally in your browser.

Encode plain text to Base64 or decode it safely.

Encode URL components or decode escaped text.

Generate secure RFC 4122 version 4 UUIDs locally.

Generate strong passwords locally with configurable characters.

Create a SHA-256 hash locally in your browser.

Test JavaScript regular expressions against sample text.

Convert a HEX color to RGB and HSL formats.

Re-encode a local image as a quality-adjustable JPEG.

Resize an uploaded image and download a PNG copy.

Convert a browser-supported image to PNG locally.

Convert a browser-supported local image to JPEG with selectable quality.

Convert a browser-supported local image to WebP with selectable quality.

Remove a selected solid image background color locally and download a transparent PNG.

Convert simple CSV data into JSON locally.

Convert a JSON array of objects into CSV locally.

Convert text to upper, lower, title, camel or snake case.

Generate clean placeholder paragraphs for designs and drafts.

Days Between Dates