About Online Mini Tools
Online Mini Tools is a free library of 2,300+ browser-based utilities for developers, designers and everyday tasks: JSON and Base64 tools, encoders, validators, unit and data converters, CSS generators and calculators. Most tools run fully in the browser with no account, so pasted data stays on your device. Chrome and Firefox extensions let you search every tool from the toolbar.
Online Mini Tools is a free collection of more than 2,300 small web utilities that run in the browser. The library is aimed at developers, designers, students and anyone who needs a quick one-off calculation without installing desktop software or signing up for an account.
Developer tools cover the everyday jobs: a JSON formatter and validator, Base64 encoder and decoder, URL and HTML encoders, a JWT decoder, hashing utilities, regex testers, text diffing and case conversion. Data and unit converters handle CSV, YAML, INI and Base N transformation, while the CSS side covers gradient, shadow and grid generators.
Away from code, the site holds financial and health calculators, date and time utilities, image and colour tools, and a set of generators for random data.
Two things keep the site useful in practice. First, processing happens in the page rather than on a server for the majority of tools, so sensitive strings do not need to leave the browser. Second, there is no account and no paywall: open a tool, use it, close the tab. Chrome and Firefox extensions add a toolbar search so any tool is one keystroke away, and new tools are added regularly from requests on the site.
Developer tools cover the everyday jobs: a JSON formatter and validator, Base64 encoder and decoder, URL and HTML encoders, a JWT decoder, hashing utilities, regex testers, text diffing and case conversion. Data and unit converters handle CSV, YAML, INI and Base N transformation, while the CSS side covers gradient, shadow and grid generators.
Away from code, the site holds financial and health calculators, date and time utilities, image and colour tools, and a set of generators for random data.
Two things keep the site useful in practice. First, processing happens in the page rather than on a server for the majority of tools, so sensitive strings do not need to leave the browser. Second, there is no account and no paywall: open a tool, use it, close the tab. Chrome and Firefox extensions add a toolbar search so any tool is one keystroke away, and new tools are added regularly from requests on the site.
