About BrainVert

Why this site exists

Most online utilities are hostile. You search for something simple — how to split a bill, how many days until a date, how many cups are in a litre — and you land on a page buried under pop-ups, forced sign-ups, cookie walls, and three screens of filler before the actual tool.

BrainVert is the opposite. Every tool loads instantly, works immediately, and asks nothing of you. No account, no email, no download.

How the tools work

Everything runs client-side — that is, the calculation happens in your own browser using JavaScript, not on a server. When you type a password into the password generator or paste a document into the word counter, that text never leaves your device. There is no server to send it to.

This has a practical benefit beyond privacy: the tools are fast, and most of them keep working even if your connection drops after the page loads.

What's here

61 tools across 6 categories:

• Calculators — Free online calculators — tip, age, percentage, GPA, salary, discount, ROI & more. Fast, accurate, no signup required. 14 calculators.
• Converters — Free unit converters online — temperature, length, weight, volume, speed, area, shoe & clothing sizes. Instant results, no signup needed.
• Time & Date — Free time & date tools — countdown timer, online stopwatch, days between dates, time zone converter, world clock & more. No signup required.
• Generators — Free online generators — secure password generator, QR code generator, business name ideas, random name, color palette & more. No signup.
• Text Tools — Free text tools online — word counter, character counter, text case converter, text to speech, morse code, URL slug generator & more.
• Random & Fun — Free random & fun tools — flip a coin, roll dice, spin wheel of names, magic 8-ball, truth or dare, rock paper scissors & more. No download.

You can browse the complete tool directory or use the search box at the top of any page.

Accuracy

We take correctness seriously — conversion factors are checked against primary sources, random number generation uses the browser's cryptographic random API where security matters, and calculators are tested against worked examples. That said, these tools are for general use and shouldn't be your only source of truth for financial, legal, or safety-critical decisions. See our Terms of Use.

If you spot a wrong result, please tell us — corrections are the most useful feedback we get.

How the site is funded

BrainVert is free to use. We may introduce display advertising to cover hosting and development costs. We will never put a tool behind a paywall or a sign-up form, and we will never sell what you type into a tool — as explained in our Privacy Policy, we never receive it in the first place.

Get in touch

Suggestions for new tools, bug reports, and corrections are all welcome — see the contact page.