Everyday utilities that stay on your device
Utility tools cover the small jobs that show up outside image and PDF work: generating a QR code for a Wi-Fi network or payment link, scanning a QR from a screenshot, creating a strong password or passphrase, counting words for an essay limit, converting units, checking colour contrast, building a simple invoice, or running a countdown for a session.
Because these tools run locally, generated passwords and scanned codes are not logged on a remote server. That is especially useful for credentials, one-time payment links, boarding-pass screenshots, and personal documents you would rather not paste into a third-party web app with unclear retention.
Popular utility workflows
Use the Password Generator when you need a unique credential for a new account and want the randomness created on your own machine. Use the QR Code Generator and QR Scanner when you need to share or read a link without installing another phone app — including decoding a code that only exists inside a screenshot. Reach for the Invoice Generator when freelancing requires a clean PDF invoice without signing up for accounting software.
Word counters help hit essay or abstract limits. Unit converters and percentage/loan/BMI/age calculators handle the arithmetic people otherwise open a spreadsheet for. Colour contrast checkers support accessible text choices before you publish a page or slide.
- Credentials and Wi-Fi QR codes: generate or scan locally, then copy once
- Freelance paperwork: invoice PDF without an account
- Study and writing: word count before you submit
- Accessibility: check contrast before shipping UI copy
When a utility is the wrong tool
These pages are intentionally small. They are not a password manager, not a full accounting suite, and not a replacement for professional tax or medical advice from calculators that estimate BMI or loan schedules. Use them for quick, private answers — then move durable secrets into a proper vault and durable finances into software you already trust.
Browse related how-tos in our Guides, or read more about why Whiztools keeps processing on-device in About.