DevBox — Base64, JWT, URL, Hash, JSON

Five developer tools in one offline popup. Decode and encode Base64, decode and pretty-print JWTs with an expiry badge, encode and decode URLs and HTML entities, hash with MD5 and SHA-1/256/512, and format or validate JSON. Paste anything and DevBox auto-detects the type. Everything runs locally. Your tokens and secrets never leave the browser, and it works offline. Free: all five tools plus your last 5 conversions. Pro ($99 lifetime): JWT verify and sign, unlimited searchable history, batch conversion, and Pro across every Zovo extension. No tracking. No ads. Privacy policy https://zovo.one/privacy-policy