26 launch-ready tools
Free online tools
Calculators and converters built around shared metadata, examples, FAQ, analytics events, and related tools.
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Featured paths
Start with category paths that connect useful tools with supporting resource guides.
Priority calculators
High-traffic calculator pages with deeper examples, FAQ, and limitation notes.
Start with
More calculator checks
Date Difference CalculatorEveryday converters
Conversion tools for money, measurements, travel, shopping, and everyday checks.
Developer data tools
Browser-side developer helpers for data cleanup, encoding, and formatting without uploading raw text or files.
Productivity text tools
Text helpers for counting, reading-time estimates, and casing cleanup without storing raw text.
Start with
Daily reflection
Lightweight lifestyle prompts that encourage reflection without predictions or advice claims.
Related resources
Calculators
Calculators
Age Calculator
Calculate completed years, months, and days from a birth date to an as-of date.
Calculators
Aspect Ratio Calculator
Resize width or height while preserving the source aspect ratio.
Calculators
Compound Interest Calculator
Calculate compound growth from either a nominal annual rate or a rate applied every eligible day.
Calculators
Date Difference Calculator
Count days between two calendar dates using exclusive or inclusive mode.
Calculators
Discount Calculator
Calculate discount amount and final price from an original price and discount percent.
Calculators
Percentage Calculator
Calculate a percentage of any value with a clear, copyable result.
Calculators
Time Duration Calculator
Calculate hours and minutes between two times, with optional break minutes and overnight mode.
Converters
Converters
Area Converter
Convert square area values across metric, imperial, and land units.
Converters
Currency Converter
Convert USD, KRW, EUR, JPY, GBP, CNY, and other common currencies with live reference rates.
Converters
EXIF Metadata Remover
Create a browser-local image copy with common embedded metadata reduced.
Converters
Image Compressor
Compress JPEG, PNG, or WebP images locally in your browser.
Converters
Image Resize
Resize JPEG, PNG, or WebP images locally in your browser.
Converters
Length Converter
Convert length values across metric and imperial units.
Converters
Shoe Size Converter
Convert measured foot length to Korean, Japan, China, EU, US, and UK reference shoe sizes.
Converters
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin temperatures.
Converters
Volume Converter
Convert liters, milliliters, cups, gallons, pints, quarts, and other volume units.
Converters
Weight Converter
Convert weight and mass values across metric and imperial units.
Developer
Developer
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text in your browser.
Developer
CSV to JSON Converter
Convert CSV text into formatted JSON in your browser.
Developer
JSON Formatter
Format, validate, or minify JSON text in your browser.
Developer
URL Encoder / Decoder
Encode URL components or decode percent-encoded text in your browser.
Lifestyle
Productivity
Productivity
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, or kebab-case.
Productivity
Character Counter
Count total characters, characters without spaces, and lines.
Productivity
Reading Time Calculator
Estimate reading time from word count and words-per-minute speed.
Productivity
Word Counter
Count words, characters, and non-space characters in pasted text.