All Online Tools & Free Calculators

Format and beautify unindented or minified HTML5 markup with standardized 2-space indentation and clean parent-child tag hierarchy.

Parse and convert YAML 1.2 configuration documents into structured, formatted, or minified JSON objects and arrays.

Reverse characters, flip words, and invert sentence order with complete Unicode and grapheme cluster accuracy.

Strip out empty blank lines and consecutive whitespace from text, code, and documents instantly.

Remove repeated and duplicate lines from text lists, logs, and CSV data instantly with zero client-side latency.

Convert text to kebab-case (e.g. 'hello-world') for SEO slugs and CSS classes.

Convert strings and variable names into snake_case with lowercase letters and underscore separators.

Convert text to camelCase (e.g. 'helloWorld') for JavaScript and JSON keys.

Format text into natural Sentence Case, automatically capitalizing the first letter of each sentence following terminal punctuation.

Convert headlines and titles to professional Title Case following APA, Chicago, and MLA editorial style conventions.

Convert text, screams in caps, and paragraphs to small lowercase letters with full multilingual Unicode support.

Convert text, letters, and paragraphs to UPPERCASE capitalized letters with complete Unicode diacritic support.

Count characters, words, spaces, sentences, paragraphs, and estimated reading time in real time.

Calculate display aspect ratios and scale image and video dimensions proportionally.

Convert area and land units between Metric (m², ha, km²) and Imperial (sq ft, acres, sq mi) systems.

Calculate 1-Repetition Maximum (1RM) strength and training percentages across 7 formulas.

Calculate 5 target heart rate training zones using Karvonen and %HRmax formulas.

Calculate theoretical maximum heart rate (HRmax) and age-adjusted cardiovascular limits.

Convert miles to exact walking or running steps based on height and stride length.

Convert step counts into exact miles, kilometers, and calories burned based on stride length.

Calculate running pace, elapsed time, or distance with instant unit conversion.

Calculate running pace, kilometer/mile splits, and finish times for 5K, 10K, Half Marathon, and Marathon.

Calculate ideal body weight (IBW) based on height, gender, and clinical formulas.

Calculate body fat percentage, lean muscle mass, and fat categories using the US Navy Method.