Tools

Calculate a percentage, a share, or a percentage change.

Resize a local image and export PNG, JPEG, or WebP.

Calculate a shift duration, including overnight shifts and unpaid breaks.

Format, validate, and inspect JSON in your browser.

Count calendar days and completed years between two dates.

Calculate mean, median, minimum, maximum, sum, and range.

Simplify a whole-number ratio and calculate its proportions.

Count words, characters, lines, and approximate sentences.

Convert uppercase, lowercase, title case, and code naming styles.

Sort lines, remove duplicates, trim whitespace, or remove empty lines.

Replace literal text with optional case sensitivity.

Turn a title into a clean lowercase URL slug.

Securely pick an item or shuffle a list on your device.

Run a local countdown with work and break presets.

Measure elapsed time and record laps locally.

Design a color gradient and copy ready-to-use CSS.

Inspect token headers and payloads without uploading them.

Create cryptographically random version 4 identifiers.

Check JSON syntax and report parsing errors.

Remove unnecessary whitespace from valid JSON.

Compare JSON structures and identify changed fields.

Compare two texts line by line.

Test JavaScript regular expressions in a timed worker.

Convert HEX colors into RGB and HSL values.