Small tools. Big utility.

I like building things. Usually, it starts because I'm stuck on a problem and can't find a simple way out. So I write a script. Then I give it a user interface. If it's useful to me, I put it here. Maybe it's useful to you - maybe it isn't. But it's here.

Marketing

Influencer Rate

How much should you pay an influencer?

Finance

VAT Toggle

Reverse tax calculator (Brutto/Netto).

Finance

Build vs. Buy

Should you build it or buy it?

Finance

Death Date

Are you Default Alive or Default Dead?

Finance

Freelance Hourly Rate

The Rate Reverser: Calculate your true hourly rate.

Finance

Quit Threshold

When should you quit your job?

Marketing

ROAS Breakeven

The ROAS Truth: Know your floor.

Marketing

Budget Pacer

Land the plane smoothly.

Finance

Cap Table Snapshot

Visualize equity dilution instantly.

Finance

Discount Erosion

Revenue is vanity. Margin is sanity.

Finance

Employee Cost Calculator

Salary is just the down payment.

Marketing

Funnel Simulator

Optimism is not a strategy.

Events

Pitch Clock

Respect the audience. Stop when the screen turns red.

Events

Randomizer Drum

Suspense without the noise.

Events

Seat Filler

Physics doesn't negotiate.

Events

Networking Bingo

Gamify the awkwardness.

Events

Ticket Breakeven

Don't subsidize your attendees.

Recruiting

LinkedIn Boolean Architect

Stop fighting syntax.

Recruiting

Email Permutator

Most companies are predictable.

Recruiting

Lead Dork Console

The web is full of leaky data.

Finance

Cost of Turnover

Culture isn't soft. Losing people is hard cash.

Developer

Vector Scrubber

Figma exports are messy. Don't ship bloated code.

Developer

JSON <-> CSV Converter

The Data Transmuter.

Social Media

LinkedIn Text Formatter

Stand out in the scroll.

Marketing

Max CPL Calculator

Know your ceiling.

Productivity

The Meeting Ticker

Time is money. Watch it burn.

Finance

SaaS Pricing Tier Calculator

Good. Better. Best. Blended.

Developer

The Regex Humanizer

Speak the alien language.

Finance

The Reverse Stripe

Get paid what you asked for.

Marketing

Google Review Link Generator

Remove the friction.

Productivity

Script Timer

Respect the listener's time.

Finance

TAM SAM SOM Calculator

The SaaS Ceiling: Check the math before you build.

Productivity

Timezone Overlap Grid

Stop doing timezone math in your head.

Marketing

The UTM Architect

Clean data in. Clean insights out.

Marketing

The UTM Bulk Builder

Scale your tracking.

Finance

Vesting Cliff

Visualize your stock option vesting schedule.

The Logic

There is a lot of noise in software right now. Everything wants to be a platform. Everything requires a login and a credit card before you even know if it works. I'm trying to go the other way. Small, single-purpose tools. You use them, get the value, and get on with your work. No bloat. No friction.

The Maker

I'm Manuel Koelman. Serial Entrepreneur, Pirate, and Leadership Whisperer. I build companies at PIRATE.global and write about my experiences at arrr.co.

Connect with me on LinkedIn or visit manuelkoelman.com.

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