Popular tools
A hand-picked selection of the tools people find most useful across every category.
Profit Margin Calculator
Calculate gross profit and profit margin from cost and revenue.
Open tool →ROI Calculator
Calculate return on investment as a percentage and net gain.
Open tool →Percentage Calculator
Solve percentages: X% of Y, what percent, and percent change.
Open tool →JSON Formatter
Beautify and minify JSON with adjustable indentation.
Open tool →UUID Generator
Generate random version 4 UUIDs individually or in bulk.
Open tool →JWT Decoder
Decode a JWT's header and payload without a server.
Open tool →Regex Tester
Test regular expressions against text with live matches.
Open tool →Word Counter
Count words, characters, sentences, and reading time.
Open tool →Case Converter
Convert text between upper, lower, title, and more.
Open tool →Text Diff Checker
Compare two texts and highlight the differences.
Open tool →Slug Generator
Turn titles into clean, SEO-friendly URL slugs.
Open tool →Schema Markup Generator
Generate JSON-LD structured data for common types.
Open tool →Password Generator
Create strong, random passwords with custom rules.
Open tool →CSV to JSON Converter
Convert CSV data into a clean JSON array of objects.
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