Base64 Encoder vs Decoder

Confused about whether to encode or decode Base64? Learn the difference and which tool to use for your input.

Encoding and decoding Base64 are mirror operations. The direction you need depends on whether your input is already Base64 text or plain data.

Base64 Encoder

  • Turns plain text or data into Base64-encoded ASCII.
  • Use it when you need to embed data in JSON, URLs or text-only systems.
  • Offers a URL-safe variant that swaps + and / for - and _.
Open Base64 Encoder

Base64 Decoder

  • Turns Base64 text back into the original plain text or bytes.
  • Use it when you have encoded text (ending in = padding, or with only Base64 characters) and need the original.
  • Accepts both standard and URL-safe alphabets.
Open Base64 Decoder

Verdict

If your input is normal text and you need the gibberish-looking encoded form, encode it. If it is already Base64 text and you need to read it, decode it.