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SMALL TOOLS, EVERYDAY SOLUTIONS
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Compress photos. Convert data.
Small tools for everyday calculations and file tasks.
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10Tools ready to use
Work · Life · Photos · Developer
Work · Life · Photos · Developer
Work & leave
WORK / 03
Parental Leave Calculator
Korean leave dates and benefit estimates. Korean interface.
Annual Leave Calculator
Accrual records and unused leave estimates under Korean rules. Korean interface.
Work Hours & Pay Calculator
Work hours, night premiums and weekly holiday pay under Korean assumptions. Korean interface.
Everyday & finance
LIFE / 05
Early Repayment Calculator
Compare early repayment costs under Korean loan terms. Korean interface.
Car Ownership Cost Calculator
Compare fuel, operating expenses and depreciation for two vehicles. Korean interface.
Stacked Discount Calculator
Model coupon order, caps, points and card benefits. Korean interface.
Home Purchase Cost Calculator
Itemized Korean property purchase costs with explicit assumptions. Korean interface.
Anniversary & D-day Calculator
Calculate milestones and save a private anniversary card. Korean interface.
Photo tools
PHOTO / 01
Image Compressor
Reduce multiple images to a target file size and pixel dimensions.
Developer tools
DEVELOPER / 01
JSON · CSV Converter
Convert data formats and preview rows and columns.
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Images and conversion data are not uploaded to our servers.
Clear instructions
Find practical examples, instructions and FAQs with each tool.
Tool guides
Repayment fees and interest (Korean) · Image size and pixel dimensions · JSON and CSV conversion tips
Choose a tool for your task
Explore ten tools across work, everyday calculations, photos and development. The new calculators currently have Korean interfaces. Labor and property tools use Korean rules and show their scope and official sources. English image and JSON tools remain available.