travist/jsencrypt

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

6804 stars · 1995 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

JSEncrypt is a tiny, zero-dependency JavaScript library for OpenSSL-compatible RSA encryption, decryption, signing, and key generation. It works in both browsers and Node.js, supports PEM-formatted keys, and is built on Tom Wu's jsbn library.

Use cases

• encrypt data with rsa in javascript
• decrypt rsa encrypted messages in the browser
• generate rsa key pairs in javascript
• sign and verify data with rsa in node.js
• encrypt user credentials before sending to server
• validate jwt tokens with rsa public keys
• encrypt files before upload in the browser
• work with openssl pem keys in javascript

When to choose

• you need lightweight RSA encryption/decryption in the browser or Node.js with a small bundle size
• you must interoperate with OpenSSL-generated PEM keys
• you want a zero-dependency library with sync and async APIs
• you need RSA signing and verification for tokens or document integrity

When to avoid

• you need modern AEAD symmetric encryption like AES-GCM or ChaCha20
• you need full TLS/protocol-level security rather than application-level RSA
• you require production-grade in-JavaScript key generation (use OpenSSL instead)
• your environment supports the native Web Crypto API, which is faster and more auditable

Facets

library · maturity active

cryptography security sdk security web-development frontend developer-tools browser cross-platform rsa encryption openssl pem-keys zero-dependency digital-signatures key-generation javascript nodejs

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