Free Online Tools for Everyone

What this site is

WebToolsOnline is a collection of 87 small, single-purpose web utilities. Each one does one job — format a JSON payload, work out a loan repayment, check a character limit, decode a token — and does it without asking you to create an account or install anything.

The design goal is that a tool should be faster than the alternative. If formatting a config file here takes longer than opening an editor and doing it by hand, the tool has failed. That is why everything runs in the page as you type, and why there is no upload step, no queue and no result email.

How the tools are built

Every calculation and transformation happens in JavaScript in your own browser. There is no server-side processing of your input, which has two consequences worth knowing. The useful one is privacy: text you paste into a formatter, figures you enter into a salary calculator and credentials you decode never leave your device, so the tools are safe for material you could not upload to a third party. The limitation is that anything genuinely requiring a server — crawling a live URL, processing a file too large for memory — is out of scope by design.

Where a tool relies on a standard or a formula, the page explains which one and links the reference. Where a calculation depends on rules that change — tax bands, statutory thresholds, platform character limits — the page says so, because a number presented without its assumptions is not much use.

What this site is not

These are not professional advice. The finance and tax calculators are planning tools built on published formulas, and rates change with every budget; the health calculators report population screening measures rather than diagnoses. For a decision that matters, confirm with someone qualified. If you find a result you believe is wrong, please tell us — include the tool and the input you used, and we will reproduce it.