Encoding

Base64 Decode

Decode Base64 back to UTF-8 text.

Base64 input
Output

Result appears here after you select

{ } How to use

  1. Paste your Base64.
  2. Select Process to get the original text back.

{ } How it works

Base64 Decode works on the text you provide. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.

Input

  • Base64 input — paste or type your input in the left panel (use Sample for an example)

Output

TXT text — copy or download it from the Output panel.

{ } Common uses

  • Read a Base64 field out of a JSON payload, a JWT or a config file.
  • Check what a data URI actually contains.
  • Recover text that was encoded for transport.

{ } Limitations

  • Only the standard alphabet is accepted. URL-safe Base64, which uses - and _ in place of + and /, is rejected — swap those two characters first.
  • The bytes are decoded as UTF-8, so encoded data that was never text comes back as unreadable characters.

{ } FAQ

Is my data uploaded to a server?

No. Everything runs locally in your browser — your files never leave your device.

Can I process more than one file at once?

This tool works on one input at a time.

Is this tool free?

Yes — it’s completely free and needs no sign-up.

Why does it say my input is not valid Base64?

Usually a stray character, or a URL-safe - or _. Surrounding whitespace is trimmed for you, so that is not the cause.

{ } Guides