Base64URL(header)
Base64URL(payload)
Base64URL(signature)
This tool runs only in your browser. It does not upload your data anywhere.
Security note: do not use “alg=none” in production. Never trust a JWT unless you verify it server-side.
This tool runs only in your browser. It does not upload your data anywhere.
Security note: do not use “alg=none” in production. Never trust a JWT unless you verify it server-side.
JWT encoder — Create a JWT locally by editing header/payload JSON and choosing HS256 or none. Shows base64url parts and lets you copy the token or share a link. Browser-only MVP.
Example: Use this tool to sanity-check numbers quickly, then share the link if you need to discuss with others.
FAQ: (1) Does it upload my data? No—runs in your browser. (2) Can I share results? Yes—use the share link feature. (3) Is it authoritative? Treat it as a convenience, not professional advice.
JWT 產生器 — 在本機編輯 header/payload JSON 產生 JWT（HS256 或 none）。顯示 base64url 分段；可複製 token 或分享連結。純前端 MVP。
範例：用這個工具快速試算與對照結果，需要討論時再把連結分享給對方。
FAQ： (1) 會上傳資料嗎？不會，計算在瀏覽器內完成。 (2) 能分享結果嗎？可以，用分享連結。 (3) 準確嗎？請把它當作便利工具，不是專業建議。