Base64 to Hex Decoder

How to Use Base64 to Hex Decoder

1. Paste your Base64 string into the input field. Newlines and spaces inside the Base64 are stripped automatically (a common issue with email-wrapped or manually line-broken payloads).
2. Pick your separator. Space is most readable for humans, None packs tightest, Comma pastes into programming language byte arrays, 0x-prefix drops straight into C / Rust / Go source code.
3. Toggle uppercase if your downstream tool expects A-F instead of a-f. Some protocol specs (MAC addresses, ITU-T) lean uppercase; most modern APIs prefer lowercase.
4. Leave URL-safe on if you’re pasting a JWT fragment, a URL parameter, or anything from Python’s base64.urlsafe_b64encode(). The - and _ chars get translated to + and / before decoding.
5. Watch the stats line. You’ll see N bytes decoded, the hex output length, and any extras: +2 pad means we auto-added ==, URL-safe means we translated -_.
6. Copy or download. Copy writes to clipboard; Download saves as hex-<timestamp>.txt. Keyboard shortcut: Ctrl+Enter (or Cmd+Enter on Mac) does both in one step.
7. Fix errors. If you see “Invalid Base64: unexpected character”, the error names the exact offending character and its position in the sanitized string - remove or replace it and retry.