Utilities
Handy everyday utilities — private, in your browser
Pick random numbers, draw winners from a list of names and read QR codes from images or your camera. 3 free tools that never upload your data — no signup, no limits.
All utilities
Popular utilities
Random & Picking
2 toolsQR Codes
1 tool3 tools shown
Workflows
Common jobs, done in a few steps
Run a giveaway
Pick a random number range, then draw winners from a list of names.
Why Nelstack
Fast, private utilities
Your data never leaves your device
Name lists, number ranges, images and camera frames are processed in your browser — nothing is uploaded or stored.
Fair, cryptographically secure picks
Numbers and winners use the browser’s secure random generator with rejection sampling, so every option has an equal chance.
Images as well as text
Read a QR code from a photo, a screenshot or a file — images are read locally and never sent anywhere.
Camera scanning on phones
The QR reader can use your phone camera, and prefers the rear one. Declining it still leaves images and screenshots.
No caps or signup
No daily quota, no account and no ads inside the tools.
Built for phones too
Touch-friendly controls that fit a small screen without sideways scrolling.
Looking for another kind of tool?
These live in their own tool areas and work the same private, in-browser way. Password, UUID and hash generators are in Security Tools.
Utilities FAQ
Are these utilities really free?
Yes. The random number generator, the name picker and the QR code reader are free with no signup, no daily limit and no watermark. Use them as often as you like.
Is my data sent to a server?
No. Every utility runs entirely in your browser. Your name lists, number ranges, images and camera frames are processed on your device and are never uploaded or stored.
Are the random picks fair?
Numbers and winners come from your browser’s cryptographically secure random generator (crypto.getRandomValues) with rejection sampling, so every value or name has an equal chance. Math.random is never used.
Does the QR code reader need camera access?
Only if you choose to scan live. The camera needs your permission and a secure (https) page. If you decline or have no camera, you can still drop in an image or paste a screenshot, and the frames are never recorded or sent anywhere.
Can the QR code reader open files from my phone or computer?
Yes. Choose an image file, drop it on the page or paste a screenshot with Ctrl+V. The file is read locally in your browser, and the tool decodes one QR code per picture without opening any link for you.
Where are the password, UUID and hash tools?
Password and UUID generators, hashes, encoders and encryption tools live in Security Tools. Text cleanup is in Text Tools and image conversion is in Image Tools. All of them also run privately in your browser.