Guides to free online tools

Which free online tool to use, when, and what it will not tell you — written to be read before you paste anything into a box.

Converters Text tools Passwords and privacy QR codes and sharing Dates and time

15 guides

A close-up of a hand turning the page of a wall calendar from February to March, with a desk lamp casting warm light on the paper.

Calculating Exact Age: Free Online Tools and the Leap-Year Problem

Learn how to calculate exact age in years, months and days, why the 365.25 shortcut fails, and when to use free online tools versus a spreadsheet or solicitor.

Dates and time 8 min read

A desk calendar showing a marked deadline sits beside a pen and a printed contract in soft office light.

Working Days, Business Days and Free Online Tools: A Deadline Guide

Learn what 'five working days' really means, why public holidays break automatic counts, and how to set deadlines no one can misread.

Dates and time 8 min read

A shallow-focus photograph of a vintage brass calendar mechanism with two adjustable date pointers set several days apart, resting on a textured linen surface.

Days Between Two Dates: Why Free Online Tools Can Get It Wrong

Learn to count days between two dates accurately, know when browser calculators help, and why notice periods, interest and deadlines need more than a calendar.

Dates and time 8 min read

A close-up of two hands exchanging a plain white business card that has a small black QR code printed in one corner, with a blurred café table in the background.

Digital Business Cards: vCard, QR Codes and Free Online Tools Compared

Learn which vCard fields phones import cleanly, when a vCard QR beats a link QR, and how to share contacts without oversharing.

QR codes and sharing 8 min read

A smartphone and a coffee cup on a small café table, with a blank card lying face-down beside the saucer.

How to Share a Wi-Fi Password Using Free Online Tools

Learn how to share a Wi-Fi password safely using free online tools, phone features, and guest networks for homes, cafés and holiday lets.

QR codes and sharing 8 min read

A close-up of a printed QR code on a matte paper flyer, photographed at an angle under soft daylight, with a smartphone held just above it.

QR Codes: Why Yours Will Not Scan and Which Free Online Tools to Trust

A practical guide to QR code error correction, print sizing, and the risks of dynamic short-link services, so you choose the right free online tools.

QR codes and sharing 8 min read

A laptop screen showing a browser's developer tools network panel on a tidy wooden desk, with a notebook and pen beside it.

Are Free Online Tools Safe? A Checklist Before You Paste

Use this quick checklist to find out whether a free online tool uploads your data and how its terms let it use what you paste.

Passwords and privacy 8 min read

A small notebook and a brass key resting on a wooden desk next to a closed laptop, suggesting offline password recovery.

Password Managers: What They Solve, When Free Online Tools Fail

A guide to what password managers protect you from, how vault breaches differ from plaintext leaks, and when a free online tool is the wrong choice.

Passwords and privacy 8 min read

A close-up of a hand typing on a laptop keyboard in soft window light, with a notebook and a hardware security key resting nearby.

How Strong Does a Password Need to Be? A Free Online Tools Guide

Learn how password entropy, length, and real attacker methods determine strength, and when free online tools are enough—or when you need a password manager.

Passwords and privacy 8 min read

A close-up of a keyboard and a notebook on a clean desk, with soft natural light from a nearby window.

Free Online Tools for Title Case, Sentence Case and Cleanup

Learn how to fix title case, strip invisible characters and normalise whitespace from pasted text before it breaks your CMS or spreadsheet.

Text tools 8 min read

A laptop keyboard and a blank sheet of paper on a wooden desk in soft window light.

URL Slugs: Write Web Addresses That Last with Free Online Tools

Learn what a URL slug is, why it is not just a hyphenated title, and how to build web addresses that stay correct after years of links and search indexing.

Text tools 8 min read

A close-up of a laptop screen showing blurred word-count figures, with a notebook and pen resting beside the keyboard.

Why Free Online Tools Give Different Word Counts for the Same Text

Learn why the same paragraph returns different word and character counts across tools, and how to pick the right counter for invoices, forms and posts.

Text tools 8 min read

A close-up of a laptop screen showing two overlapping file icons on a clean desk, with a notebook and pen beside it.

Converting Files Online: What Free Online Tools Lose

A no-nonsense guide to what free online file converters really discard, which formats are lossy, and when to keep your documents off the web.

Converters 8 min read

Two clear measuring jugs on a kitchen counter, one filled to the US pint mark and the other to the imperial pint mark, showing visibly different liquid levels.

Metric vs Imperial: A Practical Guide for Users of Free Online Tools

A practical guide to metric and imperial units that share a name but not a size, with a comparison table, conversion rules, and common traps.

Converters 8 min read

A close-up of a metal ruler and a tape measure lying on a wooden workbench, showing both metric and imperial markings side by side.

Unit Conversion: A Practical Guide to Free Online Tools

Learn how conversion factors work, when a free online converter is safe, and which jobs need a spreadsheet, native app or professional instead.

Converters 8 min read