About CryptoTools.site
We build completely free, client-side utilities with one simple rule: your data is yours alone.
Hi! I'm a software developer, a Python engineer, an active crypto trader, and a passionate cybersecurity advocate. Like many of you, I deal with blockchain protocols, calculations, and cryptographic tasks on a daily basis. I built this site to solve my own daily frustrations with utility tools currently available online.
The web is full of calculator sites, unit converters, and password makers. But almost all of them suffer from three major issues:
- The Subscription & Account Trap: Many simple utility sites force you to sign up, input credit card details, or look at intrusive ads just to calculate a tax rate or check address validity.
- The AI Illusion & Hallucinations: People are increasingly throwing calculations at raw AI chatbots. But LLMs are notorious for **hallucinating math calculations**, lack real-time API integrations for live market prices, and ingest your prompt history for training.
- The Hidden Data Collection: Most online encoders, hashers, and private key generators send your inputs directly to their backend web servers. If you paste a password or generate an RSA key, those keys are transmitted over a network and can be logged.
That's why I created CryptoTools.site. Here, **everything is client-side**. All cryptography, hash generation, and mathematical inputs run strictly inside your own browser. We don't want your data, we don't save your keys, and we don't track your prompts. You can even download the source code of our cryptographic engines from our public repository to audit or run them completely offline.
CryptoTools.site is 100% free, runs without any ads, and does not sell user details (since there are no details to sell!). If these tools have saved you time, prevented a liquidation, or kept your keys secure, consider supporting our development.
"Supporting us keeps our servers humming, domain active, and ensures the developer's caffeine levels stay high enough to push updates instead of subsisting purely on basic instant noodles." ☕