Professional micro tools for modern online work.
MicroToolbox provides practical calculators and browser-based utilities for ecommerce sellers, creators, freelancers, students, and small businesses. Every tool is lightweight, mobile-friendly, and designed for search-driven discovery.
Free online tools
Choose a tool below or use the search box to filter by task, platform, or keyword.
Etsy & Shopify Profit Calculator
Estimate platform fees, net profit, and margin for ecommerce products.
Open tool →Bridal Party Gift Budgeter
Plan bridesmaid gifts, robes, bags, packaging, and remaining budget.
Open tool →Freelance Hourly Rate Calculator
Find the hourly rate required to hit your annual income target.
Open tool →PayPal & Stripe Fee Calculator
Calculate payment fees, net received, and invoice gross-up amount.
Open tool →Airbnb Service Fee Calculator
Estimate guest total and host payout after cleaning and service fees.
Open tool →AI Prompt Optimizer
Turn a rough idea into a polished prompt for ChatGPT or Claude.
Open tool →TikTok & Reels Aspect Ratio Resizer
Preview a perfect vertical crop for Shorts, Reels, and TikTok.
Open tool →Crypto Tax & Capital Gains Calculator
Estimate capital gains and tax liability from crypto trades.
Open tool →PDF Compressor & WebP Converter
Convert images to WebP and estimate PDF optimization settings.
Open tool →Student Loan & College Budget Calculator
Estimate loan payments and monthly student budget balance.
Open tool →Latest guides
Short practical articles that support the tools and help visitors understand the numbers.
How to price products after marketplace fees
Learn how payment fees, shipping, and ad spend affect real product profit.
PaymentsWhy invoice gross-up matters for freelancers
Understand how to invoice more accurately when PayPal or Stripe fees apply.
PerformanceWhy WebP images can improve page speed
Smaller media files can improve user experience and search performance.
FreelanceHow to set a sustainable hourly rate
Price work with expenses, unpaid time, and realistic billable hours in mind.
CreatorWhy 9:16 is the default for short-form video
Preview vertical framing before posting to TikTok, Reels, or Shorts.
Student financeHow students can estimate monthly loan pressure
Compare expected loan payments with real monthly living costs.