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.

Fresh tools

Marketing

QR Code Generator

A QR code that never expires.

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Finance

Invoice Generator

A real invoice. No account, no watermark.

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Creator

Image Compressor

Hit the size limit without the upload.

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Creator

Word & Character Counter

Every word, counted live.

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Marketing

CPM Calculator

Cost per thousand, any direction.

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Finance

Salary to Hourly Calculator

What your salary is really worth per hour.

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Creator

Creator

Aspect Ratio Calculator

Solve any width or height.

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Creator

Color Palette from Image

Pull the dominant colors as hex.

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Creator

DPI Calculator & Print Quality Visualizer

Don't print pixels.

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Creator

EXIF Remover

Strip photo metadata, lossless, no upload.

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Creator

EXIF Viewer

Read a photo hidden metadata.

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Creator

Image Color Picker

Click a pixel, get its hex.

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Creator

Image Compressor

Hit the size limit without the upload.

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Creator

Image Converter

Convert images without uploading them.

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Creator

Image Cropper

Crop to any ratio, no upload.

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Creator

Image to PDF

Images to PDF, no upload.

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Creator

Instagram Line Break Generator

Line breaks that survive the post.

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Creator

Invisible Character

Copy a blank that is not empty.

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Creator

LinkedIn Text Formatter

Stand out in the scroll.

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Creator

Readability Score

How hard is your writing to read?

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Creator

Rotate & Flip Image

Rotate, flip, mirror. No upload.

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Creator

Signature Generator

Draw or type, download a transparent PNG.

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Creator

Social Media Image Resizer

One image, every platform size.

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Creator

Video Bitrate Calculator

Know before you shoot.

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Creator

Word & Character Counter

Every word, counted live.

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Creator

YouTube Thumbnail Downloader

Grab any YouTube thumbnail.

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Developer

Developer

Case Converter

Fix the case. Clean the text.

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Developer

JSON <-> CSV Converter

The Data Transmuter.

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Developer

Slug Generator

Text to a clean URL slug.

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Developer

Vector Scrubber

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

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Events

Events

Event Matchmaking

Turn event networking from a lottery into a plan.

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Events

Event Ticket Pricing Calculator

Don't subsidize your attendees.

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Events

Networking Bingo Generator

Gamify the awkwardness.

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Events

Room Capacity Calculator

Physics doesn't negotiate.

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Events

The Perfect Rotation

Mathematical precision for speed networking.

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Events

The Raffle Picker

Draw winners. Make it fair. Add suspense.

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Events

The Stage Timer

Stop when the screen turns red.

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Finance

Finance

Cost of Turnover Calculator

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

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Finance

Discount Profit Calculator

Revenue is vanity. Margin is sanity.

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Finance

Employee Cost Calculator

Salary is just the down payment.

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Finance

Estimate Generator

PDF estimates and quotes, no account.

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Finance

Etsy Fee Calculator

What Etsy really takes.

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Finance

Freelance Hourly Rate Calculator

The Rate Reverser: Calculate your true hourly rate.

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Finance

Invoice Generator

A real invoice. No account, no watermark.

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Finance

Margin vs Markup Calculator

Margin and markup are not the same.

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Finance

PayPal Fee Calculator

What PayPal really takes.

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Finance

Receipt Generator

A receipt in PDF. No account.

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Finance

Salary to Hourly Calculator

What your salary is really worth per hour.

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Finance

Startup Dilution Calculator

Visualize equity dilution instantly.

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Finance

Startup Runway Calculator

Are you Default Alive or Default Dead?

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Finance

Stripe Fee Calculator

Get paid what you asked for.

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Finance

TAM SAM SOM Calculator

The SaaS Ceiling: Check the math before you build.

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Finance

Time Card Calculator

Total the week. No signup.

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Finance

VAT Calculator

Add or back out VAT instantly.

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Finance

Vesting Cliff Calculator

Visualize your stock option vesting schedule.

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Marketing

Marketing

A/B Test Significance Calculator

Real winner or just noise?

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Marketing

Ad Budget Pacer

Land the plane smoothly.

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Marketing

Barcode Generator

A barcode you can download.

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Marketing

Conversion Rate Calculator

Optimism is not a strategy.

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Marketing

Corporate Email Permutator

Guess the right inbox.

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Marketing

CPM Calculator

Cost per thousand, any direction.

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Marketing

Engagement Rate Calculator

What is your real engagement rate?

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Marketing

Google Review Link Generator

Remove the friction.

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Marketing

Influencer Rate Calculator

How much should you pay an influencer?

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Marketing

Max CPL Calculator

Know your ceiling.

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Marketing

QR Code Generator

A QR code that never expires.

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Marketing

ROAS Breakeven Calculator

The ROAS Truth: Know your floor.

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Marketing

ROAS Calculator

Return on ad spend, any direction.

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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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Productivity

Productivity

Delete Pages from PDF

Drop pages from a PDF, no upload.

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Productivity

Meeting Cost Calculator

Time is money. Watch it burn.

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Productivity

Merge PDF

Combine PDFs into one, no upload.

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Productivity

Rotate PDF

Turn sideways PDF pages upright.

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Productivity

Timezone Overlap Grid

Stop doing timezone math in your head.

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Productivity

Words to Minutes Calculator

Respect the listener's time.

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Recruiting

Recruiting

LinkedIn Boolean Search Generator

Stop fighting syntax.

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Recruiting

The Lead Excavator

The web is full of leaky data.

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Why this page exists

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.

Who built this

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

Connect with me on LinkedIn or visit manuelkoelman.com.