Free Online Tools

Powerful calculators, converters, and generators. All processing happens in your browser - your data never leaves your device.

Calculators

Financial, scientific, and everyday calculators

Converters

Unit, currency, and format converters

Generators

Password, text, and code generators

Privacy First

All data processed locally in your browser

Available Tools

ROI Calculator

FINANCE

Free online ROI calculator. Calculate your return on investment percentage, profit/loss, and annuali...

File Hash Comparison Tool

TECH

Compare files and folders using SHA-256 cryptographic hashing. Maintains folder hierarchy and visual...

About MultiTools

MultiTools is a platform providing free, privacy-focused online tools. Unlike other services, we process everything client-side in your browser - your data never leaves your device.

Our tools are perfect for quick calculations, conversions, and generation tasks without compromising your privacy or security.