Seven Free Browser-Based Encryption Tools Use Web Crypto API With No Uploads

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A new set of seven free encryption tools on Utility Tools Lab runs entirely in the browser using the Web Crypto API, so files, keys and passphrases are never sent to a server. The category covers AES file and text encryption, RSA and ECDSA key generators, a certificate signing request generator, a certificate decoder, and a text cipher that the author warns is not secure. The developers say the tools rely on the platform's built-in cryptography and on crypto.getRandomValues for randomness, offering quick results without uploads. The article cautions that users must choose long, unique passphrases because lost passphrases cannot be recovered, and it advises storing generated private keys in secure vaults. For high-stakes or regulated work, it recommends established tools such as OpenSSL or GnuPG.

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