Internet Tool Box Every small job, one tab.
60 free tools that run entirely in your browser — no signup, no upload, your data never leaves your device.
Tools to manipulate and analyze text.
Developer utilities and data conversions.
Tools for audio, images and colors.
Calculators and work tools.
About Internet Tool Box
Internet Tool Box is a growing collection of single-purpose web utilities you can open in a tab and use without signing up, installing anything, or uploading a file to a server. Every tool runs entirely in your browser: the code that processes your data is shipped to your device, your input never leaves it, and the result is generated locally.
The library covers four broad areas — text manipulation, developer utilities, media & color work, and everyday business calculators. Popular picks right now include the Password Generator with customizable symbol rules, the JSON Formatter for pretty-printing and validating payloads, and the Duration Converter for flipping between minutes, hours, days and seconds in a single step.
Why this site exists
Most online utilities that look free hide a catch: they ask for your email before giving you a result, they quietly upload your file to a server you know nothing about, or they bury the tool under three pages of SEO-padded text and pop-ups. We wanted something different — a boring, fast, single-tab utility for each small job.
Everything on Internet Tool Box is open to anyone, runs offline after the first visit, and is deliberately focused. No accounts, no uploads, no file-size paywalls. If you use a tool once a month, you shouldn't have to remember a password for it.
Curious about how we operate? Read About Internet Tool Box, our Privacy Policy, or get in touch.