Why Tools Ku
- Free, no signup
- Browser-local, not uploaded
- No install
- Desktop & mobile
SM4 Encryption: Chinese SM4 symmetric encryption/decryption. Keys and plaintext stay local.
For dev/test; use audited server crypto in production.
Steps
- Enter input/key
- Pick algorithm
- Run
- Copy output
FAQ
- Signup required for SM4 Encryption?
- No. Free with no account.
- Secrets uploaded?
- No.
- Production passwords?
- Use server-side libraries.
- Output format?
- Often hex or Base64—see page.
- Mobile browsers?
- Yes; heavy tasks better on desktop Wi-Fi.
- Copy or download?
- Yes—copy text or download files as supported.