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4 tools available
Free online utilities for everyday file tasks, including a file extension changer for single or batch files.
Generate random numbers within any range with customizable options. Free online random number generator for games, contests, and cryptography.
Calculate Unix file permissions in octal (e.g. 755) and symbolic (rwxr-xr-x) notation.
Generate production-ready .gitignore files for Node.js, Python, React, Go, Java, and more.
Change filename extensions locally in your browser for single or batch files without format conversion.