Business
Purchase Order Generator
Create purchase orders with supplier details, items, tax and delivery terms.
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Free browser-based tools
Useful little tools for annoying little problems.
Fast, straightforward calculators and utilities for work, websites, money, and everyday tasks. No downloads. No clutter.
Calculate it.Fees, taxes, rates, percentages.
Generate it.URLs, records, snippets, structured data.
Clean it up.Text, formatting, developer data.
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Open toolBuilt for the task in front of you
Probably Useful is a growing collection of free browser-based calculators, generators, converters, and practical guides. The tools are designed for the small jobs that interrupt real work: calculating a margin, checking Canadian sales tax, formatting JSON, building a tracked URL, creating a redirect, or fixing text that arrived in the wrong format.
Start with the Tools library when you already know what you need to do, or browse the Guides when you want the formula, reasoning, limitations, and examples behind a task. Many tools run directly in your browser, and the basic utilities do not require an account or download.
Learn the why
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Helpful guides
Website Migration Redirect Checklist
A practical redirect workflow for redesigns, domain changes, permalink updates, and CMS migrations.
Read guideBrowser Tool vs App: When a Small Tool Is Better
A practical framework for deciding when a one-purpose browser utility is enough and when you really need full software.
Read guideJSON vs Base64 vs URL Encoding: What Each Does
Learn why JSON structures data, Base64 represents bytes as text, and URL encoding makes data safe inside URL components.
Read guideNo downloadsTools run directly in your browser.
No account requiredCore tools stay quick and accessible.
Plain languageUseful results without unnecessary jargon.