Essential Utilities Catalog

All 30 core tools designed for everyday computation, string manipulation, financial modeling, and media conversion. All utilities run with real anchor links and zero tracking.

Prettify, validate, and debug JSON objects with syntax error detection and tree navigation.

Bidirectional converter between Unix epoch timestamps (seconds/milliseconds) and human calendar dates.

Convert ASCII, UTF-8 strings, and binary data to and from Base64 representation.

Encode and decode query strings, URL parameters, and percent-encoded components.

Generate high-entropy cryptographically secure random passwords with customizable character sets.

Count words, characters, sentences, paragraphs, and estimate reading and speaking durations.

Create high-resolution downloadable QR codes for URLs, WiFi access points, and plain text.

Generate uniformly distributed random numbers within custom minimum and maximum bounds.

Compress PNG and JPG images in-browser using client-side canvas algorithms without uploading files.

Convert transparent or opaque PNG graphics to lightweight JPG format with adjustable quality.

Resize image pixel dimensions, crop aspect ratios, and downscale images locally.

Calculate exact calendar age in years, months, and days, next birthday countdown, and duration between dates.

Transform text into UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.

Compare fixed monthly payment (annuity) and decreasing principal mortgages with interest schedule.

Multi-country wage income tax calculator across US, UK, HK, SG, Canada, Australia, India, and China with official brackets.

Body Mass Index screening for adults with metric and imperial units and WHO health classifications.

Live foreign exchange rates sourced directly from the European Central Bank via the Frankfurter API.

Fixed-rate installment personal, auto, or retail loan calculator with monthly payment and total interest.

Forecast wealth accumulation with monthly contributions, annual percentage return, and yearly compounding.

Calculate percentage of a number, percentage share between values, and percentage increase or decrease.

Calculate Grade Point Average on a standard 4.0 scale with course credit hours and dynamic course entries.

Convert pre-tax compensation between annual, monthly, bi-weekly, weekly, daily, and hourly equivalent rates.

Convert measurements across length, weight, and temperature with physical boundary checks.

Convert wall-clock times between global IANA time zones with daylight saving gap and overlap handling.

Drift-free countdown timer and split lap stopwatch derived from high-resolution system timestamps.

Cryptographically secure RFC 4122 Version-4 UUID generator with batch generation up to 1,000 IDs.

Generate classical pseudo-Latin placeholder text by words, sentences, or paragraphs for design mockups.

Live GitHub-flavored Markdown editor and HTML previewer with DOMPurify sanitization and export.

Interactive visual color picker with bidirectional HEX (#RRGGBB) and RGB conversion and clipboard copy.

Direct video and audio stream extractor (subject to upstream bot-wall restrictions).

Related tools

• JSON Formatter & Validator
• Related: Validate JSON
• Unix Timestamp Converter
• Base64 Encode & Decode
• URL Encode & Decode
• Related: URL Encode
• Password Generator
• Word & Character Counter
• QR Code Generator
• Random Number Generator
• Bonus: Dice Roller
• Image Compression
• PNG to JPG Converter
• Image Resizer
• Age & Date Difference Calculator
• Related: Date Difference
• Case Converter
• Mortgage Calculator
• Income Tax Calculator
• Related: China Resident IIT
• BMI Calculator
• Currency Converter
• Installment Loan Calculator
• Compound Interest Calculator
• Percentage Calculator
• GPA Calculator
• Salary Converter
• Unit Converter
• Timezone Converter
• Countdown Timer & Stopwatch
• UUID Generator
• Lorem Ipsum Generator
• Markdown Previewer
• Color Picker & Converter
• YouTube Video Downloader (Restricted Beta)