About Tooltern

Tooltern is a growing collection of small, focused utilities for developers and anyone who works with text and data. Almost every tool runs entirely in your browser, so what you paste never leaves your device.

Privacy

• No cookies, accounts, tracking analytics or fingerprinting.
• We keep one anonymous daily tally of views per page, plus the domain of a site that linked here (for example a search engine). No cookies, IP addresses or browser details are stored, so no visitor can be told apart or followed.
• No third-party scripts, fonts or CDNs, enforced by a strict Content Security Policy.
• The server keeps no access logs of tool inputs.
• Toolbelt stamps: when you use a tool, the home page marks it with a stamp and lists your recently used tools. That list lives only in your browser's local storage, is never sent to us, and can be reset or switched off from the toolbelt panel on the home page.
• New guides shelf: to show a NEW flag and a “new since your last visit” list, your browser remembers the date of your last visit in local storage. It is never sent to us.
• Need to send a password? Fusenote, our sister tool, makes an encrypted link that self-destructs after one read.
• The image compressor redraws your photo in the browser: it is never uploaded, and saving the result drops hidden location tags (EXIF) that phones often embed.
• The QR generator draws every code in your browser, so Wi-Fi passwords and contact details never leave your device. The API processes each request in memory and discards it immediately.
• One optional feature uses an outside AI service: Ask AI on the What is this? page sends up to 1,500 characters, only when you press it, to a classification model that returns a label. We do not store or log that text.

Why

Many free tool sites wrap a one-line function in trackers and ads, or quietly upload what you paste. Tooltern is the opposite: fast pages, no tracking, and nothing to sign up for.