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.
Word & Character Counter
Count words, characters, sentences, reading time, and analyze keyword density in real-time. 100% private in-browser text tool.
JSON Formatter & Validator
Format, validate, beautify, and minify JSON data instantly with real-time error detection. 100% private in-browser tool.
Base64, Hash & JWT Inspector
Encode & decode Base64 (Unicode safe), generate SHA-256/SHA-512 hashes, and inspect JWT tokens in-browser. 100% private.
Image Compressor (Batch & In-Browser)
Compress JPG, PNG, and WebP images up to 80% without losing quality. Multi-file batch support, 100% private in-browser.
Image Resizer & Format Converter
Resize images by exact pixels or percentage with aspect ratio lock. Convert formats (PNG, JPG, WebP) in-browser.
JPG / PNG to PDF Converter
Convert multiple JPG and PNG photos into a clean, single PDF document in seconds. 100% private in-browser.
PDF Merger - Combine PDF Files Online
Merge multiple PDF documents into a single file in your desired order. 100% private in-browser tool with zero server uploads.
PDF Splitter - Extract PDF Pages Online
Extract specific page ranges or split every page into separate PDF documents. 100% private in-browser tool.
PDF Compressor - Reduce PDF Size Online
Compress PDF files and reduce document size up to 80% without losing text readability. 100% private in-browser tool.
PDF to JPG / PNG Converter
Convert PDF pages into high-resolution JPG or PNG images with 1-click ZIP download. 100% in-browser.
Batch Image Format Converter
Convert PNG, JPG, WebP, AVIF, and BMP images in batch with quality control. 100% in-browser.
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 Text & Code Diff Checker
Compare two texts or source code files side-by-side or unified with line, word, and char diff. 100% in-browser.
GeoJSON ⇄ TopoJSON & GIS Converter
Convert between KML, GPX, CSV, TopoJSON, and GeoJSON with instant spatial validation. 100% in-browser.
Online SQL Formatter & Beautifier
Format, beautify, and minify PostgreSQL, MySQL, SQLite, Oracle, and T-SQL queries. 100% in-browser.
Online JWT Debugger & Token Decoder
Decode, inspect, and verify JSON Web Tokens (JWT) with live expiration countdown. 100% in-browser.
CSS Box Shadow & Glassmorphism Generator
Create multi-layer CSS box shadows and frosted glass effects with instant Tailwind CSS code. 100% in-browser.
Online Case Converter & Text Formatter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and 10+ formats. 100% in-browser.
Online HTML / CSS Minifier & Beautifier
Minify and beautify HTML and inline CSS with instant compression savings calculator. 100% in-browser.
URL Encoder / Decoder & Query Param Builder
Encode, decode, parse URLs and build query parameters interactively. 100% in-browser privacy.
Photo EXIF & GPS Metadata Remover
Strip hidden GPS location, camera model, and device metadata from photos. 100% private in-browser.
SVG to CSS Data URI & Background Generator
Convert SVG icons directly to CSS background-image and Tailwind CSS classes. 100% in-browser.
Online Voice Recorder & Audio Visualizer
Record crystal-clear audio from your microphone with live waveform visualizer. 100% in-browser privacy.
Brotli, Gzip & Deflate Compression Benchmark
Simulate & compare network transfer sizes across Gzip, Brotli, and Deflate algorithms. 100% in-browser.
Markdown to PDF & Printable Document Studio
Format and convert Markdown notes, docs, and resumes into printable PDFs. 100% in-browser.
CSV to Excel (.xlsx) Converter & Data Grid
Convert CSV, TSV, and delimited text files to native Excel (.xlsx) format. 100% in-browser.
WCAG 2.1 Color Contrast Checker & Accessibility
Calculate color contrast ratios and test compliance with WCAG AA and AAA standards. 100% in-browser.
Cryptographic Hash Generator & File Checksum Verifier
Generate SHA-256, SHA-512, SHA-384, SHA-1, MD5, and CRC32 hashes. 100% in-browser.
NanoID, ULID & API Token Generator Studio
Generate compact, URL-safe, and time-sortable unique IDs and API tokens. 100% in-browser.
SVG Optimizer & Vector Minifier Studio
Clean metadata, strip editor namespaces, and minify SVG vector file size. 100% in-browser.
HTML to JSX & React Component Converter
Convert HTML templates, Tailwind & Bootstrap snippets to clean React JSX/TSX. 100% in-browser.
CSS Clamp & Fluid Typography Calculator
Calculate responsive CSS clamp() values for fluid typography and spacing without media queries. 100% in-browser.
JSON to TOML & TOML to JSON Converter Studio
Bidirectionally convert JSON and TOML configuration files (Cargo, pyproject, Go). 100% in-browser.
JSON to SQL Schema & INSERT Generator Studio
Convert JSON arrays into CREATE TABLE schemas and INSERT queries for PostgreSQL, MySQL & SQLite. 100% in-browser.
JWT Token Generator & HMAC Signer Studio
Sign and generate valid JWT authentication tokens using HS256, HS384, and HS512. 100% in-browser.
JWT Signature Verifier & Token Validator
Cryptographically verify HS256, HS384, and HS512 JWT signatures and expiration. 100% in-browser.
CSS Keyframe Animation & Easing Studio
Create custom CSS @keyframes animations with live preview, timing easing, and Tailwind export. 100% in-browser.
CSS Mesh Gradient & Fluid Aurora Studio
Create multi-point radial mesh gradients, fluid aurora wallpapers, and export pure CSS or PNG. 100% in-browser.
YAML to TOML & TOML to YAML Converter Studio
Bidirectionally convert Kubernetes/Docker YAML and Rust/Python TOML configuration files. 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.
Multi-Stage Dockerfile & Compose Generator
Generate optimized multi-stage Dockerfiles and compose configs for Next.js, Node, Python, Go, and Rust. 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.
PDF Page Numberer & Rotator
Add page numbers, headers/footers, and rotate PDF pages in your browser. 100% private.
Image Color Palette Extractor & Eyedropper
Extract dominant color palettes and pick exact pixel colors from photos. 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.
Duplicate Line Remover & Text Sorter
Remove duplicate lines, trim whitespace, and sort text alphabetically in 1-click. 100% in-browser.
Lorem Ipsum & Mock Data (JSON) Generator
Generate multi-language dummy text, HTML markup, and realistic mock JSON datasets. 100% in-browser.
Markdown to HTML Converter & Live Editor
Convert Markdown to clean HTML with real-time synchronized preview & standalone export. 100% in-browser.
Regular Expression (Regex) Tester & Debugger
Test, evaluate, and debug regular expressions with live match highlighting & cheat sheet. 100% in-browser.
SVG to PNG, JPEG & WEBP Converter
Convert vector SVG graphics to high-resolution PNG, JPEG, and WEBP images at any scale. 100% in-browser.
CSV ⇄ JSON Converter & Data Table Viewer
Convert CSV, TSV, and JSON bidirectionally with live interactive spreadsheet table preview. 100% in-browser.
Aspect Ratio Calculator & Dimension Resizer
Calculate exact image, video, and screen aspect ratios and resize dimensions proportionally. 100% in-browser.
HTML Entity Encoder & Decoder Studio
Convert special characters to named, decimal, or hex HTML entities and decode back to text. 100% in-browser.
Visual Cron Schedule & Expression Generator
Build, translate, and verify crontab schedules with human-readable summary & next execution times. 100% in-browser.
Universal Color Converter & Contrast Checker
Convert HEX, RGB, RGBA, HSL, HSV, and CMYK colors with live WCAG 2.1 contrast accessibility score. 100% in-browser.
Subtitle Converter & Audio Sync Time Shifter
Convert subtitles between SRT, WebVTT, and plain transcript, adjust time sync offsets. 100% in-browser.
CSS Gradient Generator Studio
Create beautiful linear, radial, and conic CSS gradients with multi-stop controls & 1-click code export. 100% in-browser.
URL Slug & Clean Permalink Generator
Convert article titles to clean SEO-friendly URL slugs, kebab-case, and snake-case with multi-language transliteration. 100% in-browser.
JSON to TypeScript & Zod Schema Converter
Convert raw JSON into strongly-typed TypeScript interfaces, types, and Zod validation schemas. 100% in-browser.
Number Base Converter (Binary, Hex, Decimal, Octal)
Convert numbers synchronously between Binary, Hexadecimal, Decimal, Octal, and ASCII with memory bit padding. 100% in-browser.
Markdown & HTML Table Generator Studio
Build, edit, and export GitHub-Flavored Markdown, HTML, CSV, and JSON tables with interactive spreadsheet matrix. 100% in-browser.
CSS Clip-Path Shape Studio & Generator
Visually build custom CSS polygon clip-paths, geometric shapes, and coordinate vertices with live preview. 100% in-browser.
cURL to Code Converter (Fetch, Axios, Python, Go)
Instantly convert cURL command lines into JavaScript fetch, Axios, Python requests, Go, Node.js, and PHP code. 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.
JSON ⇄ YAML Converter & Formatter Studio
Bidirectional JSON to YAML and YAML to JSON converter with customizable indentation and syntax validation. 100% in-browser.
User-Agent Parser & Device Inspector Studio
Decode browser User-Agent strings to detect Browser name & version, OS, Device type, CPU architecture, and Rendering Engine. 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.
Image Filter Studio & Photo Effects
Apply real-time photo filters, lighting, contrast, saturation, and color grading effects with HD export. 100% in-browser.
Loan & Mortgage Amortization Calculator
Calculate monthly payments (EMI), total interest paid, loan payoff date, and yearly amortization schedule. 100% in-browser.
UUID / GUID & ULID Generator Studio
Generate cryptographically secure RFC 4122 UUID v4, time-ordered UUID v7, ULID, and short nano IDs in bulk. 100% in-browser.
HTML Table to CSV, JSON & TSV Converter
Parse HTML <table> markup and convert into Excel CSV, JSON objects, TSV, or Markdown tables. 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.
CSS Glassmorphism & Frosted Glass Generator
Create modern frosted glass UI cards with live backdrop-filter, blur, opacity, borders, and shadows. 100% in-browser.
CSV & JSON to XML Converter Studio
Convert CSV tables and JSON datasets into well-formed XML documents with custom root/row tags and CDATA. 100% in-browser.
Tip & Bill Split Calculator
Calculate restaurant tips, custom tip rates, and split bills evenly per person. 100% in-browser.
CSV to SQL INSERT Statement Converter
Convert CSV spreadsheets into MySQL, PostgreSQL, SQLite, and MS SQL INSERT statements with auto data-type detection. 100% in-browser.
Cryptographic Random String & Token Generator
Generate cryptographically secure random strings, API secret keys, hex tokens, and PIN codes. 100% in-browser.
Date Difference & Business Days Calculator
Calculate days, weeks, months, years, and working business days (excluding weekends) between dates. 100% in-browser.
Hex ⇄ ASCII & UTF-8 Text Converter
Convert hexadecimal strings to plain text (ASCII/UTF-8) and text to hex format with byte inspection. 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.
Text & List Sorter (Alphabetical & Numerical)
Sort lines alphabetically (A-Z, Z-A), naturally numeric (1, 2, 10), and by length with duplicate removal. 100% in-browser.
Binary ⇄ Hexadecimal (Hex) Converter
Convert binary bits to hexadecimal strings and hex to binary bytes with live byte matrix inspection. 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.
Markdown Task List & Checklist Generator
Visually build GitHub-flavored Markdown task lists (- [ ] and - [x]) with progress tracking and subtask indentation. 100% in-browser.
XML to JSON Converter
Parse XML documents, RSS feeds, and SOAP payloads into structured JSON objects with custom attribute mapping. 100% in-browser.
Image ⇄ Base64 & Data URI Converter
Convert images (PNG, JPG, SVG, WEBP) to Base64 Data URIs, HTML img tags, CSS background rules, and decode Base64 to image files. 100% in-browser.
Fancy CSS Border Radius & Blob Generator
Visually generate advanced 8-point fancy border-radius values, organic blobs, and fluid shapes with live CSS and Tailwind code. 100% in-browser.
Text ⇄ Binary Code Translator
Convert plain text to 8-bit binary code strings and decode binary bytes to readable text with UTF-8 character matrix. 100% in-browser.
SQL INSERT to JSON Converter
Parse SQL INSERT statements and database dumps into clean, structured JSON arrays with live data table preview. 100% in-browser.
Pure CSS Triangle & Arrow Generator
Visually generate pure CSS triangles and arrows for tooltips, popovers, dropdowns, and speech bubbles in 8 directions. 100% in-browser.
Visual JSON Diff & Compare Tool
Deeply compare two JSON objects to visually highlight added, removed, and modified keys with summary stats. 100% in-browser.
ROT13 & Caesar Cipher Encoder / Decoder
Encode and decode text using ROT13, ROT47, Atbash, and custom Caesar ciphers with live alphabet mapping visualizer. 100% in-browser.
Custom Placeholder & Dummy Image Generator
Generate customized dummy placeholder images with exact dimensions, custom colors, text labels, and grid patterns. 100% in-browser.
SEO Meta Tag & Open Graph Generator
Generate complete HTML meta tags, Open Graph properties, and Twitter Cards with live Google and social media previews. 100% in-browser.
Linux & Unix Chmod Permissions Calculator
Visually calculate Linux/Unix file and directory permissions in octal (755, 644, 777), symbolic notation, and ready-to-use chmod commands. 100% in-browser.
Text & Word Repeater Online
Repeat any word, text, phrase, or emoji up to 10,000 times with custom delimiters (newline, space, comma) and line numbers. 100% in-browser.
Credit Card & Luhn Algorithm Validator
Validate credit and debit card number formats, detect card network (Visa, Mastercard, Amex, Troy), and verify Luhn Mod 10 checksum. 100% in-browser.
Text Whitespace Cleaner & Formatter
Remove extra duplicate spaces, strip empty lines, trim leading/trailing whitespace, and normalize tabs in text. 100% in-browser.
CSS Cursor Style Tester & Generator
Explore and test 30+ standard CSS cursor styles live, create custom emoji/SVG cursors, and export CSS or Tailwind utility classes. 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.
IPv4 Subnet & CIDR Calculator
Calculate Subnet Mask, Network ID, Broadcast IP, Wildcard, usable host range, and 32-bit binary notation live in-browser. 100% private.
HTML to Markdown Converter
Convert raw HTML code, rich snippets, and blog posts into clean GitHub Flavored Markdown (GFM) with live preview. 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.