6 live · 11 planned · 93 candidates
Micro Web Tools Collection
A portfolio where Korea-focused tools live alongside global utilities.
Starting with law, real estate, and finance — expanding into wedding, retirement, and developer tools.
Solve repetitive life and work friction in under a minute.
No login · Minimal ads · No personal data sent to servers
- Live
- 54
- Planned
- 3
- Hubs
- 10
- Candidates
- 93
HUB · 🇰🇷 Korea
Real Estate & Tax
Buy, rent, capital gains, gifting, loans — Korea edition
🇰🇷 Korea
Dual-Income DSR Calculator (Korea)
Compare solo, joint, and spouse-only mortgage limits under Korea’s 2026 Stress DSR Phase 3.
- Stress DSR Phase 3
- Dual-income scenario
- Couple mortgage
🇰🇷 Korea
Jeonse Deposit Insurance Eligibility Checker
Real-time check on HUG/SGI/HF Korean jeonse insurance eligibility with rejection reasons and fees.
- HUG
- SGI
- Official price 126%
🇰🇷 Korea
Jeonse Risk Score (Korea)
Score the risk of a Korean jeonse deposit using debt ratio, auction recovery, and HUG/SGI insurance eligibility — in under a minute.
- Debt ratio
- Auction recovery
- HUG/SGI eligibility
🇰🇷 Korea
Korean Capital Gains Scenario Comparator
4 scenarios compared: sell now, 1y later, 10y later, or gift. Korean capital gains tax with long-hold discount and 2026 multi-home surcharge.
- Single home
- Long-hold discount
- Multi-home surcharge
🇰🇷 Korea
Stressed DSR Loan Limit Simulator
Korean Stressed DSR (2025.7 Phase 3 + +3.0%p capital-area surcharge). Compare mortgage, jeonse, and credit loan caps.
- Stressed DSR
- DSR 40%
- +3.0%p surcharge
🇰🇷 Korea
Gift vs. Sell vs. Hold (Korea Property Tax)
Compare after-tax proceeds across sell, gift, and 10-year hold scenarios for Korean property.
- Capital gains tax
- Gift tax
- Multi-home surcharge
- Long-term deduction
🇰🇷 Korea
First-Time Homebuyer Special Loan Simulator
Eligibility, limit, and rate comparison across 5 Korean policy mortgages (Didimdol, Newborn, Bogeumjari, etc.).
- Didimdol
- Newborn special
- Bogeumjari
🇰🇷 Korea
Temporary Two-Home Non-Taxable Checker
Auto-check Korea's 3-year disposal rule for temporary two-home tax exemption with D-Day counter.
- 3-year rule
- Tax Decree §155
- Tax exemption
🇰🇷 Korea
Korean Jeonse Loan Limit Comparator
Compare Korean jeonse loan limits across HF, SGI, HUG, and Beotimmok with income, region, and age inputs.
- HF/SGI/HUG
- Youth Beotimmok
- DSR 40%
🇰🇷 Korea
Korean Acquisition Tax Surcharge Checker
Wizard-based Korean acquisition tax surcharge checker for home count, regulated area, temporary 2-home, gift, inheritance — 2026 rates.
- Regulated area
- Temp 2-home
- Gift 12%
🇰🇷 Korea
Korean Housing Subscription Score Calculator
Calculate Korean housing subscription points (84 max) from no-home period, dependents, and subscription account age.
- 84-point max
- No-home period
- Cutoff stats
HUB · 🇰🇷 Korea
Labor & Contracts
Work, lease, demand, and notice documents auto-generated
🇰🇷 Korea
Fixed-Wage Contract Validator (Korea)
Check if your fixed-wage employment contract is legally valid under Korean labor law. Auto-compute shortfall and generate a certified notice.
- 2024 Supreme Court ruling
- Shortfall calculation
- Notice generation
🇰🇷 Korea
Korean Payment Order Petition Generator
Auto-generate Korean payment order petitions for loans, wages, deposits — ready for e-court filing.
- Civil Procedure Act §462
- E-court
- Interest calculation
🇰🇷 Korea
Korean Lease Termination Notice Generator
Auto-generate Korean lease termination notices for 4 cases with effective-date calculation under Housing Lease Protection Act.
- Lease Act §6-2
- Implicit renewal
- Renewal request right
🇰🇷 Korea
Korean Payslip Generator
Auto-generate Korean payslips per Labor Standards Act §48 with 4-insurance calculations and printable A4 layout.
- Labor Act §48
- 4 insurances
- Payslip
🇰🇷 Korea
Certified Notice Generator (Korea)
Auto-generate 9 types of Korean certified notices (wages, rent, deposit, termination, etc.).
- Certified notice
- Situation templates
- Electronic filing
🇰🇷 Korea
Korean Employment Contract Generator
Generate 5 types of Korean standard employment contracts via a 10-minute wizard with real-time Labor Act violation warnings.
- Labor Act §17
- Violation warning
- 2026 Min. wage
🇰🇷 Korea
Korean 4-Insurance Calculator
Calculate Korean 4-insurance deductions with 2026 rates. Split worker/employer shares with a freelancer 3.3% side-by-side.
- 2026 rates
- Net pay
- Freelancer 3.3%
🇰🇷 Korea
Korean Year-End Tax Refund Estimator
Estimate your Korean year-end tax refund in 30 seconds with simple inputs — with a shareable card.
- Hometax
- Refund
- Deductions
🌏 Global
Privacy Policy Generator
Generate PIPA, GDPR, and CCPA-compliant privacy policies via wizard — bilingual output in HTML/MD/PDF.
- PIPA 2025
- GDPR·CCPA
- Bilingual
HUB · 🇰🇷 Korea
Wedding & Events
Invitations, gifts, budget — tools for once-in-a-lifetime events
🇰🇷 Korea
Wedding Invitation OG Preview Generator
Preview KakaoTalk/Facebook/X/LINE thumbnails and download OG images at 1200×630, 800×400, 1080×1080.
- Social thumbnail
- OG image
- Wedding invite
🇰🇷 Korea
Wedding Money QR Generator
Generate Toss payment QR and share text from bride/groom bank accounts. Weddings, baby showers, funerals.
- Toss payment
- Wedding gift
- QR code
🇰🇷 Korea
Korean Wedding Budget Simulator
Simulate Korean wedding budgets across guest count, venue, region, and level — with SDM, venue, catering, gifts, honeymoon.
- Wedding photo
- Cost split
- Gift income
🇰🇷 Korea
Korean Wedding Gift Money Advisor
Recommend Korean wedding gift money amounts based on relationship, closeness, venue type, and attendance.
- By relationship
- Hotel wedding
- Transfer message
HUB · 🇰🇷 Korea
Retirement & Finance
National pension, reverse mortgage, retirement health insurance
🇰🇷 Korea
Korean NPS Pension Estimator
Compare early / normal / delayed Korean NPS scenarios without NPS login, with lifetime totals.
- NPS
- Early claim
- Delayed claim
🇰🇷 Korea
HF Reverse Mortgage Calculator
Estimate Korean HF reverse mortgage monthly payouts; compares lifetime / term / mixed plans.
- HF
- Reverse mortgage
- Lifetime payout
🇰🇷 Korea
Korean Post-Retirement Health Insurance Calculator
Compare 3 scenarios of Korean post-retirement health insurance: employee, regional, and voluntary continuation — plus dependent eligibility.
- Regional insured
- Voluntary continuation
- Dependent status
🇰🇷 Korea
Korean FIRE Retirement Calculator
Korean FIRE calculator with ISA, pension savings, and National Pension simulation — retirement age and 100-year asset curve.
- 4% rule
- ISA pension
- NPS integration
HUB · 🌏 Global
Developer & Digital Tools
Small utilities usable anywhere in the world
🌏 Global
YouTube Chapter Timestamp Formatter
Convert free-form timestamps into YouTube chapter format and validate the 5 YouTube rules in real time.
- YouTube
- Chapters
- Timestamps
🌏 Global
SERP Snippet Preview
Preview how titles and descriptions render on Google, Naver, and mobile SERPs with character and pixel limit warnings.
- SEO
- SERP
- Meta tags
🌏 Global
HEIC Batch Converter
Convert iPhone HEIC to JPG/PNG/WebP fully in-browser. Naver/Tistory/KakaoTalk presets for Korean platforms.
- In-browser
- Batch convert
- No upload
🌏 Global
Excel Diff · Two-Sheet Compare
Compare two XLSX/CSV files cell-by-cell in the browser. Color-coded add/remove/modify with export.
- In-browser
- XLSX diff
- Export changes
🌏 Global
AI Token Counter
Compare token counts and 2026 pricing across GPT, Claude, Gemini, and Llama on one page. Includes Korean efficiency chart.
- tiktoken
- Price compare
- Korean ratio
🌏 Global
EXIF Remover
Strip GPS, camera, and timestamp EXIF metadata fully in-browser. Map preview and ZIP download.
- Strip GPS
- In-browser
- Secondhand safe
🌏 Global
Korea Travel MBTI Quiz
Find your Korean Traveler Persona with 12 wacky situations from a Korea trip — in 14 languages.
- 12 questions
- 16 personas
- 14 languages
🌏 Global
Korean Saju Reading
Korean fortune telling with four-pillars saju: fortune, K-pop celebrity compatibility, and wealth — in 14 languages.
- Saju
- K-pop compatibility
- 14 languages
🌏 Global
HEIC Batch Converter
Convert iPhone HEIC photos to JPEG/PNG in bulk. All in-browser, no upload.
- iPhone
- HEIC→JPEG
- In-browser
Planned · coming soon
🌏 Global
Image EXIF Remover
Strip EXIF metadata (GPS, device info) from photos. In-browser processing, no upload.
- EXIF
- Privacy
- Strip GPS
Planned · coming soon
🌏 Global
AI Token Counter
Count tokens and estimate cost across GPT, Claude, and Gemini with a single paste.
- GPT
- Claude
- Gemini
- Cost estimate
Planned · coming soon
HUB · 🇰🇷 Korea
Life & Health
Korean daily life tools: food, health, lifestyle
🇰🇷 Korea
Korean Food Calorie Search
Search 50+ Korean dishes for per-serving calories, macros, and sodium — with a daily basket summation.
- Korean food
- Kimchi stew
- MFDS nutrition
🌏 Global
TDEE & Macro Calculator
BMR via Mifflin-St Jeor or Katch-McArdle with activity multipliers and goal-based protein/fat/carb macros.
- BMR
- TDEE
- Macros
🌏 Global
Sleep Cycle Calculator
90-minute REM sleep cycles with 14-minute fall-asleep buffer to find optimal bedtime or wake time.
- 90-minute rule
- Sleep
- Wake time
🇰🇷 Korea
Korean Age Calculator (2023 Law)
Korean age calculator under the 2023 unified-age law: international, counting, and year age — with CSV batch and printable PDF.
- Int'l age
- CSV batch
- Printable
🌏 Global
Pregnancy Week Calculator
Pregnancy week and due date calculator with LMP, Ovulation, and Ultrasound modes. Weekly fetal info and ICS prenatal visit calendar.
- Gestational age
- Due date
- Fetal size
🌏 Global
Race Pace Predictor
Riegel race time predictor with VDOT training paces and printable wrist-band split card (km/mile).
- Riegel formula
- VDOT paces
- Wrist card
HUB · 🇰🇷 Korea
Automotive
Car tax, fuel economy, and used-car calculators for Korea
HUB · 🇰🇷 Korea
Pets
Pet owner calculators: feeding, age conversion, health
🇰🇷 Korea
Pet Food Portion Calculator
Dog & cat daily calories and food grams via RER × life-stage factor = MER formula.
- RER/MER
- Dog
- Cat
🇰🇷 Korea
Pet Human-Age Converter
Convert dog/cat age to human-age using size-tiered formulas; shows life stage and expected lifespan.
- Human age
- Breed size
- Lifespan
HUB · 🇰🇷 Korea
Shopping & Sellers
Seller calculators for Coupang, Smart Store, and Korean marketplaces
🇰🇷 Korea
Coupang Seller Profit Calculator
Compute Coupang seller net profit with category fees, RocketGross, VAT, and service fees — plus break-even pricing.
- Fees 2026
- RocketGross
- Break-even
🇰🇷 Korea
Naver Smart Store Product Name Generator
Generate 30 SEO-optimized product name candidates for Naver Smart Store following 50-char limit, no-duplicate, and order rules.
- 50-char limit
- Keyword combos
- SEO score
🇰🇷 Korea
Korean Overseas Purchase Customs Calculator
Calculate Korean overseas-purchase customs duty, VAT, and fees in 5 seconds — with USD 150 duty-free threshold.
- USD 150 duty-free
- FTA rules
- Instant calc
HUB · 🇰🇷 Korea
Parenting
Feeding, weaning, diapers, vaccines, and development tools
🇰🇷 Korea
Korean Diaper Size Matcher
Recommend diaper sizes across 6~8 Korean brands by baby weight, age, and use type. Monthly consumption + border alerts.
- Brand compare
- Night diaper
- Monthly usage
🇰🇷 Korea
Korean Newborn Feeding Calculator
Calculate newborn feeding volume, daily total, and interval by weight, age, and feeding mode — with timer and ICS alert.
- By age
- Feeding timer
- Log
🇰🇷 Korea
Korean Baby Food Recipes by Age
Recommend Korean baby food recipes by age and allergy — with auto shopping list and allergen alerts.
- 4 stages
- Allergens
- Shopping list
🌏 Global
Baby Sleep Tracker
Baby sleep guide by age with nap count, wake windows, next-sleep time, and regression alerts.
- Wake window
- Regression
- By age
🇰🇷 Korea
Korean NIP Vaccination Scheduler
Auto-generate Korean NIP 17 vaccine schedule up to age 13 from birth date. ICS calendar export.
- NIP 17 vaccines
- ICS
- Share
🌏 Global
Baby Milestone Checklist
4-domain (motor, language, social, cognitive) milestone checklist by age, with standard-range comparison.
- 4 domains
- 60 months
- Checklist
Principles
How I run it
- No login
- Checklists, calculations, and document generation all run in your browser — nothing is sent to a server.
- No personal data
- Names, emails, and phone numbers are never stored server-side. Only anonymous visit analytics.
- Free
- All tools are free. Ads cover the hosting bill. If pro features are ever added, the free tier stays.
- Open sources
- Case law, statutes, and public datasets used in each tool are cited on its page.
- Experts first
- Each tool is advisory. For actual decisions, consult a licensed professional (labor attorney, lawyer, CPA).
- Mistakes happen
- If you spot a calculation or legal error, let me know. I aim to fix within 24 hours.
About
Why I built this
In Korea, ordinary employees, small-business owners, and renters face a lot of repetitive paperwork, calculations, and judgment calls. Government sites are heavy and require logins or digital certificates; paid platforms have a high bar. This personal project fills that gap with free micro web tools.
Korea-specific tools are the core, but language-agnostic developer and media utilities live on the same infrastructure. Each tool deploys independently to its own subdomain on top of a shared stack (microsaas-infra).
One person ships all of this — plan, design, code, deploy. User feedback and bug reports are the biggest motivator.