Tool Directory20 Modules · Local-first
Utileno
Free online tools that work instantly in your browser.
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Popular tools
Percentage CalculatorAnswer the three most common percentage questions instantly — everything runs in your browser.Date CalculatorCount the exact number of days between two dates — instantly, right in your browser.Age CalculatorEnter a date of birth and get the exact age in years, months and days — plus a birthday countdown.Discount CalculatorEnter a price and a % off to see the sale price and exactly how much you save.Word & Character CounterPaste or type text and get live character, word, line, paragraph and byte counts — nothing is uploaded.JSON Formatter & ValidatorFormat, validate and minify JSON without uploading it — your data stays in your browser.
Module catalog
Categories
Date & Time
Age CalculatorEnter a date of birth and get the exact age in years, months and days — plus a birthday countdown.Date CalculatorCount the exact number of days between two dates — instantly, right in your browser.Days From TodayType a number of days and instantly see the exact date and weekday it lands on.Work Hours CalculatorWork out how many hours you worked between two times, minus breaks — overnight shifts included.
Math & Money
Discount CalculatorEnter a price and a % off to see the sale price and exactly how much you save.Percentage CalculatorAnswer the three most common percentage questions instantly — everything runs in your browser.Percentage Increase / DecreaseEnter the original and the new value — get the percent change, its direction, and the difference instantly.Ratio CalculatorSimplify a ratio to its lowest terms and scale it to any size — both directions.
Random
Random Number GeneratorSet a range, choose how many numbers, and generate — with cryptographic randomness.Random PickerPaste a list, press Pick, and get a fair random winner — your list never leaves your browser.Team GeneratorPaste names, choose the number of teams, and get a fair random split in one click.
Text
Duplicate Line RemoverPaste a list, and repeated lines disappear — with control over case, whitespace and ordering.Text DiffPaste two versions of a text and see exactly which lines were added, removed or changed.Word & Character CounterPaste or type text and get live character, word, line, paragraph and byte counts — nothing is uploaded.
Developer
Image & Design
Productivity
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Age CalculatorEnter a date of birth and get the exact age in years, months and days — plus a birthday countdown.Aspect Ratio CalculatorEnter a width and height to get the ratio — and resize to any target without distortion.Color ConverterPaste a color in any CSS format and get the other formats plus a live preview.Date CalculatorCount the exact number of days between two dates — instantly, right in your browser.