About

Hi, I'm hongry, the developer and writer behind hongry.dev. This site is a personal engineering blog and service hub where I solve recurring everyday frustrations by building web applications myself—and document the practical workflows, public data nuances, and backend engineering lessons learned along the way.

Why This Site Exists

Every time I tried to book concert tickets or register for university courses, my phone clock drifted just enough from the booking server's clock to miss the exact second. Standard weather apps showed broad regional forecasts that missed sudden neighborhood downpours, and arriving at an EV charging station often meant discovering every charger was occupied or out of order. Rather than waiting for someone else to build cleaner tools without intrusive pop-ups, I began building and operating dedicated web services for each problem.

Services I Build and Run & Practical Guides

For every service below, I publish detailed practical usage guides for real-world scenarios, along with technical deep dives into the coordinate systems, browser APIs, and distributed backend architectures that power them. If you are visiting for the first time, start with the usage guide for the service you need.

TrueTime: Millisecond Server Time Check for Ticketing & Registration

Compares a target booking server's standard time against your local device clock with millisecond precision, complete with a 10-second pre-alarm so you never miss the exact opening second.

• Usage Guide: Step-by-Step Preparation on Ticketing & Course Registration Day with TrueTime

HereWeather: Hyper-Local Neighborhood Weather

Converts your real-time GPS coordinates into the Korea Meteorological Administration (KMA) 5 km forecast grid to display hyper-local weather, feels-like temperature, fine dust (PM10/PM2.5), and hourly/weekly forecasts on a single screen.

• Usage Guide: How to Read KMA Neighborhood Forecasts Properly & Check Weather Before Heading Out
• Technical Deep Dives: Differences Between WGS84 and UTM-K Coordinate Systems, Why Map Projections Distortion Happens & How LCC Works, HTML5 Geolocation API Accuracy Limits & Error Handling

EV-Lens: Live EV Charging Station Map

Checks nationwide electric vehicle charging station locations and real-time charger availability on an interactive map, with filters for connector type (DC Combo, CHAdeMO, AC 3-Phase, Slow) and charging speed.

• Usage Guide: How to Check EV Charging Stations Before a Long Drive with EV-Lens

Public-Lens: Interactive Map of 19 Public Amenities Near You

Brings together public facility datasets scattered across government ministries and local municipalities onto a single fast map. Data is periodically synchronized from official open data portals (note that actual on-site status may occasionally differ depending on when each municipality updates its source records). Works directly in your browser without installing an app.

Everyday Amenities (7 Categories)

• Public Restrooms: Locations, opening hours, diaper changing tables, emergency bells, and accessible stalls
• Parking Lots: Public and private parking rates, capacity, and real-time available spaces where supported
• Waste Disposal Schedules: Municipal collection days, hours, and rules for general waste, food waste, and recyclables
• Free Public Wi-Fi: Government and municipal free Wi-Fi access points
• Bicycle Racks: Public bike parking and storage locations
• Car Washes: Self-service and automatic car wash locations and phone numbers
• Heritage & Protected Trees: Designated old-growth and protected trees by region

Healthcare & Medical (6 Categories)

• Pharmacies: Nearby pharmacy locations, phone numbers, and operating hours
• 24-Hour Over-the-Counter Medicine: Convenience stores registered to sell emergency household medications late at night
• Local Clinics: Internal medicine, pediatrics, ENT, and neighborhood primary care clinics
• Hospitals & General Hospitals: Regional hospitals, emergency rooms, and contact details
• Postnatal Care Centers: Postpartum care facilities and contact numbers
• Institutional Medical Clinics: On-site clinics inside universities, corporations, and public institutions

Pets & Veterinary (3 Categories)

• Veterinary Clinics: Animal hospital locations and phone numbers
• Veterinary Pharmacies: Registered pharmacies dispensing companion animal medications
• Pet Grooming Salons: Licensed pet grooming businesses

Public Safety (3 Categories)

• Emergency Safety Bells: Street and restroom emergency SOS bell locations
• Security CCTV Cameras: Public crime-prevention CCTV locations for safer night walks
• Civil Defense Shelters: Designated underground and emergency evacuation shelters

Related Guide

• Usage Guide: Finding Public Amenities Near You with Public-Lens & Understanding Open Data Limits

anyTools: 30 Browser-Based Utilities with Zero Installation

Combines document viewers, image converters, developer encoders, and everyday financial calculators in one place. Almost all processing runs 100% client-side inside your browser—meaning sensitive files and tokens never leave your device, with no sign-up or software installation required. Available in Korean, English, Japanese, Chinese, French, and Russian.

Everyday & Financial Calculators (13 Tools)

• Korea Net Salary Calculator: Monthly take-home pay after Korea's 4 major social insurances and income tax
• Global Net Salary Calculator: Estimated after-tax pay for the US, UK, and France
• VAT / TVA Calculator: Add or extract UK and European Value Added Tax
• US Sales Tax Calculator: State-by-state US sales tax and total checkout price
• Tip & Bill Splitter: Split bills and tips across KRW, USD, JPY, and EUR
• All-in-One Unit Converter: Length, area, weight, volume, temperature, pressure, speed, fuel economy, data, and time
• Date & D-Day Calculator: Day count between dates and N days before/after a target date
• Age & Lunar Date Calculator: International age, Korean age, lunar/solar conversion, and zodiac signs
• Percentage Calculator: Ratios, discounts, and percentage change
• BMI Calculator: Body Mass Index calculation from height and weight
• Random Wheel & Picker: Fair random draws for lunch menus, turn order, and raffles
• Full-Width / Half-Width Converter: Convert between Japanese/ASCII zenkaku and hankaku characters
• Japanese Era ↔ Gregorian Year Converter: Convert Reiwa, Heisei, Showa, and Taisho years

Developer Utilities (4 Tools)

• URL Encoder / Decoder: RFC 3986 percent-encoding and decoding
• Base64 Encoder / Decoder: Full UTF-8 multibyte safe Base64 conversion
• JSON Formatter & Validator: Pretty-print, syntax error pinpoint, and minification
• Password & UUID Generator: Cryptographically strong passwords and UUID v4 strings

Media & Graphics (6 Tools)

• Image Converter & Compressor: Format conversion, file size optimization, and resizing
• Image to PDF Converter: Combine multiple images into a single PDF document
• SVG Editor & Converter: Recolor, minify, and export SVGs to React JSX or PNG
• GIF Frame Editor: Inspect, reorder, delete frames, and adjust frame delay
• Loading Spinner Animator: Generate custom animated GIF spinners from SVGs or images
• QR Code Generator: Instant QR code download for URLs and text

Documents & Viewers (7 Tools)

• Office to PDF Converter: Convert Excel, Word, PowerPoint, and HWP files to PDF
• Document Perspective Scanner: Flatten photographed documents into clean images or PDFs
• PDF Toolkit: View, merge, split, and rotate PDF pages in your browser
• Markdown Editor: Live side-by-side preview and export
• HWP / HWPX Viewer: Open Korean Hangul word processor files without installing Hancom Office
• Office Document Viewer: Preview Excel, Word, and PowerPoint files directly in the browser
• Text Utilities: Character/byte counter, case converter, and duplicate line remover

Related Articles

• Usage Guide: Why In-Browser Processing Is Safer & How to Use anyTools
• Technical Deep Dives: How Base64 Encoding Works & Handling UTF-8 Strings, Differences Between URL Encoding and HTML Entities, Why Large JSON Freezes the Browser & How Web Workers Solve It

MoodCast: Emotional Weather Journal

Log how you feel each day by picking a single weather icon and a short note, then review your emotional patterns across a monthly calendar.

• Usage Guide: How to Track Your Mood Without Pressure: What to Write & How to Look Back

Editorial Principles

• Scenario-First Guides: Rather than listing UI buttons, every guide is organized around the exact timeline you face in real life—30 minutes before ticketing opens, before starting a highway drive in an EV, or right before stepping out on a rainy morning.
• Verified Official Sources: Weather, EV charging, and public facility articles reference official documentation from the Korea Meteorological Administration (KMA), the Ministry of Environment, and the Ministry of the Interior and Safety, with source links cited at the bottom of each post.
• Living Documentation: Whenever a service is updated, its corresponding guide is revised and the Last Updated date is transparently recorded at the top of the article.
• If you spot an inaccuracy in an article or encounter a bug in any service, please reach out so I can verify and fix it promptly.

Contact

For bug reports, feature suggestions, or feedback on any article, please send an email below. I read and reply to every message as soon as possible.

Email: [email protected]