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Why LocalStorage Is Not Safe for Tokens — Diffcozen
2025-12-146 min read
Why LocalStorage Is Not Safe for Tokens — Diffcozen

Introduction

Many beginners store JWT tokens in LocalStorage.
Diffcozen explains the security risks.

Risks of LocalStorage

  • Accessible by JavaScript (XSS vulnerability)
  • Persistent across browser sessions
  • Not secure for sensitive data

Secure Alternatives

  • HTTP-only cookies
  • Short-lived tokens with refresh
  • Server-side sessions

Conclusion

Avoid storing sensitive tokens in LocalStorage.
Follow secure frontend practices.

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