Tokens, minus the mystery.
JWT Decoder splits any JSON Web Token into its three parts and base64url-decodes the header and payload into pretty-printed JSON right in the widget. Standard time claims (iat, exp, nbf) get human-readable dates, and an expiry badge tells you at a glance whether the token is still active. Decoding happens entirely in your browser — tokens never leave the page, and signatures are deliberately not verified (this is an inspector, not a validator).
⚙️ Settings & Customization
- Theme
- Language
- Size
- Transparent background
- 🎨 Accent Color
Changes apply live — the embed link and preview update instantly.
📌 How to embed in Notion
- Copy the embed link from the sidebar on the right.
- Open the Notion page you want the widget on and type
/embed. - Paste the link into the embed dialog and press
Embed link. - Drag the embed's bottom edge to resize it to taste.
🆕 What's new in v1.0
- ✦ Header + payload decoded to pretty JSON
- ✦ Human-readable iat / exp / nbf dates
- ✦ Active / expired badge at a glance
- ✦ 100% in-browser — tokens never leave the page
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