小さなツール、本気の実用性。

Rent Affordability Calculator

Find out how much rent you can afford based on your income.

Appliance Energy Cost Calculator

Calculate how much an appliance costs you per month and per year.

Daily Distraction Cost Calculator

See how much time and money distractions cost you every year.

Brand Name Generator

Generate short, brandable business names from one or two keywords.

Compound Interest Calculator

Visualize how your investments grow over time with compound interest.

Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case and more.

Word / Character Counter

Count words, characters, sentences, and reading time.

JSON Formatter & Validator

Format, validate, and minify JSON with line numbers and error hints.

Password Generator

Generate strong, customizable passwords in your browser.

Color Palette Generator

Generate harmonious color palettes with one click.

Meeting Cost Calculator

See how much every minute of a meeting actually costs.

Debt Payoff Calculator (Snowball vs Avalanche)

Compare the debt snowball and avalanche strategies and see which saves you more.

Password Strength Checker

See how long it would actually take to crack a password, in your browser.

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Image Format Converter

Convert PNG, JPG, and WebP images locally.

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Image Resizer

Resize an image to exact dimensions while preserving its ratio.

PDF Merger

Combine multiple PDFs into one file in your browser.

Images to PDF

Combine JPG, PNG, and WebP images into a PDF.

SEO

SERP Snippet Preview

Preview a Google-style result and catch title or description truncation.

SEO

Schema Markup Generator

Generate JSON-LD for articles, products, organizations, events, and local businesses.

Voltage Drop Calculator

Compute the percentage drop across a feeder or branch circuit quickly.

Manual J Lite Load Calculator

Estimate room-by-room heating and cooling loads.

Euler Column Buckling Load

Compute critical buckling load for a fixed/pinned steel or wood column.

Arc Flash Boundary (IEEE 1584)

Compute incident energy and arc flash boundary distance.

健康・フィットネス

TDEE & Macro Calculator

Calculate how many calories you burn per day and how to split them into protein, carbs, and fat.

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カテゴリー別に整理された623個の無料ブラウザツール。

Rent Affordability Calculator

Find out how much rent you can afford based on your income.

HVAC Maintenance Schedule Generator

Generate a printable HVAC maintenance schedule for any property.

Affiliate Link Checker

Paste a list of affiliate links and check which are broken.

トラッカー

Sponsorship Deal Tracker

Track sponsorship deals, deadlines, deliverables, and payment status.

PDF Page Counter

Drop in a PDF and instantly see page count, file size, and stats.

Fake Pay Stub Checker

Spot the red flags of a fake pay stub before renting or lending.

Shopify Shipping Simulator

Estimate shipping cost and margin on a Shopify order.

Appliance Energy Cost Calculator

Calculate how much an appliance costs you per month and per year.

Daily Distraction Cost Calculator

See how much time and money distractions cost you every year.

Brand Name Generator

Generate short, brandable business names from one or two keywords.

Tip Calculator

Split the bill fairly and pick the right tip percentage.

Compound Interest Calculator

Visualize how your investments grow over time with compound interest.

Mortgage Payment Calculator

Estimate your monthly mortgage payment including taxes and insurance.

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Salary ↔ Hourly Converter

Convert a yearly salary to an hourly rate (or the reverse).

Savings Goal Calculator

Find out how much to save each month to hit any goal.

Discount / Sale Price Calculator

Calculate the final price, savings, and effective percentage off.

Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case and more.