Toolhub

Free web tools you can use the moment you need them — no installs, no sign-ups.

Social Trend AI A social trend analytics platform for creators and influencers. Keyword analysis, competitor radar, and a signal archive in one place. social-trend-agent.com

All tools

Search tools

Unit Price Calculator Bulk pack vs. small pack — see which is actually cheaper in seconds Character Counter Paste text to instantly count characters, words, and bytes Age Calculator Exact age, Korean counting age, and zodiac animal in one tap BMI Calculator Enter height and weight to get your body mass index instantly D-Day Counter Count down to exams, anniversaries, and deadlines Discount Calculator Sale price or discount rate — compute both ways instantly Password Generator Cryptographically secure random passwords — no server, no ads Percentage Calculator Ratios, percent change, and differences in one tab Korean Salary Calculator Annual salary in, after-tax monthly pay out (Korean taxes) VAT Calculator (Korea 10%) Split any amount into net price and 10% VAT instantly

How to use the tools

Unit Price Calculator — how to use it

Standing in a store wondering whether the 500 g detergent or the 1.2 kg one is the better deal? Enter each product's price and size, and the calculator converts both to a price per 100 g so you can compare instantly. For bundles like "buy two, get one free", enter the number of items in the bundle and it computes the true price for the total volume. No sign-up, no install — and your numbers never leave your browser.

Character Counter — how to use it

Writing against a character limit — a cover letter, an essay, a social post, or a meta description? Paste your text and you instantly see counts with and without spaces, plus how much room is left against your target. It also shows byte counts (UTF-8 and EUC-KR) for systems that limit by bytes rather than characters. Everything is calculated inside your browser; nothing is sent to a server, so sensitive text is safe to paste.

More from the makers

Other services run by the team behind Toolhub.

Social Trend AI Social trend analytics platform for creators and influencers Is It AI? (isitai.me) Free check for whether an image or video was AI-generated

Frequently asked questions

What is Toolhub?

Toolhub is a collection of free online tools — like the unit price calculator — for everyday tasks. There is nothing to install and no account to create: open your browser and it just works. Each tool is built to solve one problem, fast.

Are all the tools free?

Yes. Every tool listed on Toolhub is completely free — no payments, no subscriptions. If a paid feature ever appears, it will be clearly labeled on the tool's page.

Is my data sent to a server?

No. Toolhub tools are pure static pages: your input is processed entirely inside your browser and never transmitted. Convenience settings such as theme or language are stored only in this browser's localStorage.

How often are new tools added?

We ship new tools at a pace of two to three per week, starting from the most useful ideas. New tools appear on this page as soon as they launch, so check back from time to time.