Everyday online tools

Small tools for everyday questions

Some questions come up every day: how old is someone exactly, what is 15% of a price, how many words are in this essay, how long until the meeting starts. These tools answer them in a second, on any device, without an app or an account.

• Calculators: the age calculator gives an exact age in years, months and days and counts down to the next birthday; the percentage calculator handles percent of a number, percentage change and percentage difference, and shows the formula.
• Text: the word counter counts words, characters, sentences and paragraphs and estimates reading and speaking time as you type, which helps with essays, social posts and meta descriptions.
• Generators: the QR code generator turns links, Wi-Fi details, contacts and text into QR codes you can download as PNG or SVG; the random number generator picks fair numbers for draws, games and sampling.
• Time: the online stopwatch records laps, and the online timer counts down with an alarm and includes a Pomodoro mode for focused work.

For groups and classes, the spin the wheel name picker and the Team Quiz are in our team & classroom tools.

Guides

• How to Tell If Text Was Written by AI (and Why Detectors Fail): The writing patterns that give AI text away, how AI detectors actually work, how accurate they are, and how to check a document fairly without false accusations.
• What Are AI Hallucinations? How to Fact-Check ChatGPT Answers: Why ChatGPT, Gemini and Claude invent facts, fake citations and broken links, and a step-by-step method to verify any AI answer before you rely on it.
• How to Spot AI-Generated Images: Metadata, C2PA and Visual Clues: Check whether a photo is AI-generated: Content Credentials (C2PA), IPTC AI labels, EXIF data, error level analysis, reverse image search and the visual tells.
• What Counts as Plagiarism? Paraphrasing and Citations: Plain-English guide to plagiarism: copying vs paraphrasing vs patchwriting, self-plagiarism, AI-written text, how to cite properly and how to check a text.

All guides

Frequently asked questions

Are these tools free?

Yes. All everyday tools are free, need no account and work on phones, tablets and computers.

Is what I type sent to a server?

No. The calculators, word counter, QR code and random number generators, stopwatch and timer all run in your browser.

Do the QR codes expire?

No. The QR codes are static: the link or text is stored in the code itself, so they keep working as long as the destination does.

Do the stopwatch and timer keep running in a background tab?

Yes. They measure elapsed time from your device's clock, so switching tabs does not slow them down; the timer alarm plays when time is up.