Runs locally · No upload

Utillio vs Base64Encode.org — Private Base64 Encoding

Most Base64 sites split encode and decode across separate pages. Utillio combines both in one workbench with standard and URL-safe modes — the format JWTs use — plus live round-trip testing, all in the browser.

Utillio

  • Unified workbench — encode and decode on one page with live output
  • Standard Base64 (+/) and URL-safe Base64 (-_) modes
  • Round-trip your input to confirm encoding is correct
  • 100% client-side — credentials and JWT payloads stay on your device
  • Shareable links preserve input, direction, and encoding mode
  • Works offline after the page loads — no sign-up, no rate limits

Typical online Base64 encoder

  • Simple one-page encode or decode UI — often on separate sites
  • Rarely offers URL-safe mode alongside standard Base64
  • Server-side tools may store inputs in logs
  • Separate sites needed for JWT decode, URL encoding, hashing

Verdict

Never paste JWT tokens, API keys, or passwords into a server-side encoder. Utillio's Base64 workbench processes everything in JavaScript — switch modes, round-trip, and share links without data leaving the tab.

Try it yourself

Base64 Encoder

Encode and decode Base64 in one workbench

Converters
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