Free browser tools that never upload your files
About UsefulBasis
UsefulBasis is a collection of free browser utilities built for low-friction, high-frequency tasks. Every tool runs 100% client-side: your files and input never leave your device. Includes guitar tuner, metronome, text encoder/decoder (Base64, URL), word counter, timer, world clock, image compressor, loan and compound-interest calculators. No account, no install, free forever.
✓ VerifiedOct 23, 2026
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