Free tools that get things done in seconds.

What GetHubApps is, and how it works

GetHubApps is a collection of 80 small web tools across 10 categories — Calculators, Fitness, Food, Converters, Generators, Files, Developer, SEO, Fun and Fashion. They exist because the alternative, for most of these jobs, is either a spreadsheet formula you have to look up or a site that wants an email address before it will show you an answer.

It runs in your browser

Almost every tool here does its work on your own device. Text you paste into the JSON formatter, files you drop into the PDF merger, figures you type into a loan calculator — none of it is uploaded, because there's no server step to upload it to. You can confirm that by opening your browser's network tab while you use one.

No account, ever

There is nothing to sign up for. We don't ask for an email address to unlock a result, we don't gate exports behind a plan, and we don't hold user records — which also means there is no account database to be breached.

Each tool does one job

A tool that tries to do nine things needs a manual. The tools here are deliberately narrow: one screen, no configuration, an answer as soon as you've typed enough for one to exist.

The explanation matters as much as the answer

Every tool page explains the method behind it — the formula, the convention, the mistake people usually make. A number without that context is easy to misread, and a surprising number of costly errors come from applying a correct calculation to the wrong question.

Guides, for the part a calculator can’t tell you

A loan calculator will give you a monthly payment. It won’t tell you that the lender quoting a “flat rate” is charging roughly double what it sounds like, or that stretching the term by two years quietly doubles the interest. That belongs in writing, so we write it.

• How loan interest actually worksWhy your early repayments barely touch the principal, what a 'flat rate' quote is really costing you, and how to compare two loan offers on the number that matters.
• Percentages, discounts and tax: the errors that cost moneyWhy stacked discounts never add up, how to pull tax out of an inclusive total correctly, and why a 20% rise isn't undone by a 20% fall.
• SIP vs lump sum investing: when each works bestHow dollar-cost averaging shields you from bad timing, why lump-sum historically beats SIP in rising markets, and how to decide based on cash flow.

How the site pays for itself

The tools are free and there is no paid tier, so the hosting is covered by a small number of ads. We keep them out of the way: none between you and a result, none disguised as a button, and none that move the page as it loads. If you’d rather block them, that’s genuinely fine — nothing here stops working if you do. You can read what advertising means for your data in our Privacy Policy, and get in touch if a tool is wrong or one you need is missing.