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?

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Finance

VAT Toggle

Reverse tax calculator (Brutto/Netto).

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Finance

Build vs. Buy

Should you build it or buy it?

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Finance

Death Date

Are you Default Alive or Default Dead?

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Finance

Freelance Hourly Rate

The Rate Reverser: Calculate your true hourly rate.

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Finance

Quit Threshold

When should you quit your job?

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Marketing

ROAS Breakeven

The ROAS Truth: Know your floor.

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Marketing

Budget Pacer

Land the plane smoothly.

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Finance

Cap Table Snapshot

Visualize equity dilution instantly.

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Finance

Discount Erosion

Revenue is vanity. Margin is sanity.

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Finance

Employee Cost Calculator

Salary is just the down payment.

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Marketing

Funnel Simulator

Optimism is not a strategy.

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Events

Pitch Clock

Respect the audience. Stop when the screen turns red.

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Events

Randomizer Drum

Suspense without the noise.

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Events

Seat Filler

Physics doesn't negotiate.

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Events

Networking Bingo

Gamify the awkwardness.

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Events

Ticket Breakeven

Don't subsidize your attendees.

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Recruiting

LinkedIn Boolean Architect

Stop fighting syntax.

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Recruiting

Email Permutator

Most companies are predictable.

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Recruiting

Lead Dork Console

The web is full of leaky data.

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Finance

Cost of Turnover

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

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Developer

Vector Scrubber

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

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Developer

JSON <-> CSV Converter

The Data Transmuter.

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Social Media

LinkedIn Text Formatter

Stand out in the scroll.

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Marketing

Max CPL Calculator

Know your ceiling.

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Productivity

The Meeting Ticker

Time is money. Watch it burn.

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Finance

SaaS Pricing Tier Calculator

Good. Better. Best. Blended.

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Developer

The Regex Humanizer

Speak the alien language.

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Finance

The Reverse Stripe

Get paid what you asked for.

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Marketing

Google Review Link Generator

Remove the friction.

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Productivity

Script Timer

Respect the listener's time.

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Finance

TAM SAM SOM Calculator

The SaaS Ceiling: Check the math before you build.

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Productivity

Timezone Overlap Grid

Stop doing timezone math in your head.

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Marketing

The UTM Architect

Clean data in. Clean insights out.

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Marketing

The UTM Bulk Builder

Scale your tracking.

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Finance

Vesting Cliff

Visualize your stock option vesting schedule.

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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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