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RSA / RSA2 Encrypt / Decrypt

RSA / RSA2 Encrypt / Decrypt. Local browser processing.

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RSA / RSA2All encoding tools ↗

Encrypt/decrypt with RSA-OAEP SHA-256; sign/verify with PKCS#1 v1.5 SHA-1 (RSA) or SHA-256 (RSA2). 2048-bit OAEP accepts at most 190 UTF-8 bytes.

PEM: SPKI / PKCS#8; ≥ 2048 bits; OAEP SHA-256; RSA2 = SHA256 signature

How to use

  1. Enter your data and parameters, or load the example.
  2. Choose the operation and confirm the input format.
  3. Run the tool, then copy or download the result.

Example

RSA-OAEP SHA-256 / RSASSA-PKCS1-v1_5 SHA-1 or SHA-256

Details and limitations

Everything runs in your browser; text, files and keys are not uploaded.

Input is limited to 100,000 characters per field. Cancel stops the worker and discards the pending result.

Demo keys and passwords are public examples. Generate your own key before using real data.

FAQ

Are my keys or files uploaded?

No. Calculation happens locally in a Web Worker. Clearing or leaving the page discards its working state.

Format references

Tool page updated: