Fast, Private & Free Online Utilities
100% client-side PDF, image, text, and developer tools. Zero server compute, zero latency, absolute privacy.
Free QR Code Generator
Create custom QR codes for URLs, Wi-Fi networks, text, and vCards. 100% private, instant in-browser export to high-res PNG & SVG.
Free 1D / 2D Barcode Generator
Generate Code 128, EAN-13, UPC, Code 39, and ITF barcodes with SVG & high-res PNG download. 100% in-browser.
Online Voice Recorder & Audio Visualizer
Record crystal-clear audio from your microphone with live waveform visualizer. 100% in-browser privacy.
Markdown to PDF & Printable Document Studio
Format and convert Markdown notes, docs, and resumes into printable PDFs. 100% in-browser.
Life Spent & Habit Time Allocation Calculator
Calculate how many years of your life you spend sleeping, working, scrolling, and watching TV. 100% in-browser.
Salary Savings & Compound Wealth Simulator
Simulate how saving 20% of your salary compounds into massive wealth over 1, 5, 10, and 20 years. 100% in-browser.
Cost in Work Hours & Life Energy Calculator
Calculate how many hours and months of your life you sacrifice to buy any item. 100% in-browser.
FIRE (Financial Independence, Retire Early) Calculator
Calculate your exact FIRE Number and discover the date you can stop working forever. 100% in-browser.
Latte Factor & Small Habits Wealth Loss Calculator
Discover how your daily coffee, cigarettes, and subscriptions compound into a lost fortune. 100% in-browser.
Lifetime Reading & Bookshelf Simulator
Discover how reading just 10 or 20 pages a day compounds into a personal library of 1,400+ books. 100% in-browser.
Quit Smoking Recovery & Money Saved Calculator
Track your body's live biological recovery, money saved, and life regained after quitting smoking. 100% in-browser.
Sleep Cycle & REM Bedtime Calculator
Calculate the exact bedtime to wake up refreshed at the end of a 90-minute natural sleep cycle. 100% in-browser.
Caffeine Half-Life & Sleep Disruption Simulator
Track your blood caffeine curve and discover how afternoon coffee sabotages your deep sleep. 100% in-browser.
Screen Time & Phone Addiction Lifetime Impact Calculator
Calculate how many full consecutive years of your life you lose staring at your smartphone screen. 100% in-browser.
TDEE, BMR & Macro Nutrition Calculator
Calculate your exact daily calories, BMR, TDEE, and macro breakdown (Protein, Fat, Carbs) to reach your goal. 100% in-browser.
Intermittent Fasting & Autophagy Stages Tracker
Track your live fasting clock and biological stages: Fat Burning, Ketosis, and Autophagy. 100% in-browser.
Barcode Scanner & Live Camera Reader
Scan EAN-13, UPC-A, Code-128, and QR barcodes from webcam or photos. 100% in-browser.
Audio Tone & Frequency Generator Studio
Generate pure 1 Hz - 20,000 Hz sine, square, triangle waves and white/pink noise. 100% in-browser.
Strong Password Generator & Security Analyzer
Generate cryptographically secure passwords, passphrases, and PINs with entropy analysis. 100% in-browser.
Unix Epoch & Timestamp Converter
Convert Unix timestamps to human readable dates, ISO-8601, and world timezones. 100% in-browser.
Comprehensive Unit Converter
Convert Data Storage, Length, Weight, Temperature, Area, Speed, Time & Pressure. 100% in-browser.
Subtitle Converter & Audio Sync Time Shifter
Convert subtitles between SRT, WebVTT, and plain transcript, adjust time sync offsets. 100% in-browser.
Morse Code Translator & Audio Beeper Player
Bidirectional Morse Code translator (Text ⇄ Morse Code) with realistic Web Audio sound playback and visual blinker. 100% in-browser.
Roman Numeral Converter & Step Calculator
Bidirectional Roman Numeral converter (Numbers ⇄ Roman Numerals) with step-by-step arithmetic breakdown. 100% in-browser.
BMI & Ideal Weight Health Calculator
Calculate Body Mass Index (BMI), healthy ideal weight range, BMR, and daily caloric energy needs (TDEE). 100% in-browser.
Loan & Mortgage Amortization Calculator
Calculate monthly payments (EMI), total interest paid, loan payoff date, and yearly amortization schedule. 100% in-browser.
World Clock & Meeting Planner Studio
Compare global timezones across major cities and find overlapping international business meeting hours. 100% in-browser.
Precision Stopwatch & Pomodoro Focus Timer
High-precision millisecond lap stopwatch and Web Audio-synthesized Pomodoro focus clock (25m/5m/15m). 100% in-browser.
Percentage Calculator & Discount Tool
Calculate percentages (X% of Y), percentage increase/decrease change, discounts, and sales taxes instantly. 100% in-browser.
Tip & Bill Split Calculator
Calculate restaurant tips, custom tip rates, and split bills evenly per person. 100% in-browser.
Date Difference & Business Days Calculator
Calculate days, weeks, months, years, and working business days (excluding weekends) between dates. 100% in-browser.
Chronological Age & Birthday Countdown Calculator
Calculate your exact age in years, months, days, total hours, next birthday countdown, and zodiac sign. 100% in-browser.
Random Name Picker, Team Generator & List Shuffler
Pick random raffle winners, shuffle list items, and split names into balanced teams. 100% in-browser.
NATO Phonetic Alphabet & Radio Spelling Converter
Convert words, call signs, and serial numbers into standard ICAO / NATO phonetic radio alphabet with pronunciation guide. 100% in-browser.
Gaming Nickname & Cool Gamer Tag Generator
Generate stylish, cool, and symbol-decorated gaming usernames for Valorant, CS2, PUBG, Roblox, and MMOs with Unicode fonts. 100% in-browser.
Why Choose HerBokolog?
Engineered with modern web standards for maximum speed and privacy.
Uncompromising Privacy
Unlike traditional sites, your confidential documents, photos, and secrets never leave your device.
Instant Local Speed
Powered by WebAssembly, Web Workers, and Canvas API. Zero upload wait queues or remote server latency.
No Artificial Limits
Enjoy unrestricted usage without paywalls, countdown timers, or forced email registrations.