UseCOS: Free Online Calculators & Tools

Private, in-browser financial, photo, PDF, and decision tools with zero uploads.

About UseCOS: Free Online Calculators & Tools

UseCOS is a suite of 100% free, privacy-first decision tools and calculators engineered to run entirely in your web browser.

Unlike traditional tools that send sensitive personal data to cloud servers, UseCOS processes everything locally on your device with zero data logging, zero tracking cookies, and no account signup required.

Key Tool Categories:

• Financial & Payroll: Canadian take-home pay, severance notice calculators, and 2026 CRA/provincial tax engines.

• Mortgage & Housing: Canadian mortgage renewal analyzer, prepayment penalty (IRD) calculator, and rental DSCR cash flow tools.

• Privacy Media Utilities: Global passport and visa photo resizer (US 2x2, Canada 50x70mm, Schengen, India), zero-upload PDF compressor, permanent QR code generator, and format converter.

• Automotive: Free North American NHTSA VIN decoder and vehicle recall lookup.

Engineered for precision, backed by primary official sources, and built with modern speed.

⚔️

Not yet competed

This product is queued for the next tournament.

Real Talkpizza.txt

Hi! Quick story about pizza and founders.

Our Premium pass costs $19. That's one large pizza.

You know what happens after you eat a large pizza? Nothing. It's gone. Maybe some regret.

But $19 on Premium? Your product gets a permanent dofollow backlink from a DR 68 directory. Featured on the homepage. A guaranteed tournament slot.

That listing stays there for years. The pizza? Gone in 20 minutes.

The price is identical. The value is not.

Launch your product, not your calories.

Get Premium — $19

Real Talkcoffee.txt

Hi! Quick story about coffee and founders.

You spent more than $19 on coffee this week. You'll spend more next week. And the week after that.

A Premium pass costs $19. Once. No subscription. No renewal. Permanent dofollow backlink from a DR 68 directory. Featured on the homepage. Guaranteed tournament slot.

The coffee is gone by noon. The listing stays for years.

The coffee is gone by noon. This isn't.

Same weekly spend. One lasts forever.

Get Premium — $19