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Tool Factory

Encoding & Number Bases

Base85 Decoder

Decode Base85 input into a usable result. Enter the data, choose the input and output formats, then copy the result.

Tool workspace

Your input stays in this browser.

Add the required input to continue.

Needs input

You can run the tool again after any change.

Options

Your result appears here

Decode Base85 input into a usable result. Enter the data, choose the input and output formats, then copy the result.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

Base85 Decoder converts data between formats in your browser. For a correct result, match the variant to the producer.

decoded text or bytes Processing runs in the browser.

Instructions

  1. Provide text or data for this tool.
  2. Choose the supported Base85 variant.
  3. Compare the output with a known Base85 Decoder sample.
  4. Keep the original value until the receiving system accepts the result.

Example

Input: 87cURD_*#4Df,IAAX^

Settings: Base85 Decoder: choose the supported Base85 variant

Result: decoded text or bytes

Limits

  • Base85 Decoder: Base85 alphabets are not interchangeable
  • Base85 Decoder: The operation does not detect a different input format automatically.
  • Base85 Decoder: Processing stays in the browser.

Questions

How do I decode Ascii85 or Z85 data?

Choose the matching Alphabet before decoding. Standard Ascii85, Z85, and the IPv6 variant use different symbols. The operation returns bytes; select a text encoding separately when those bytes represent text.

Why does Base85 decoding reject the all-zero group character?

The all-zero shortcut must not also occur in the selected alphabet. Standard Ascii85 commonly uses z for this shortcut. Clear or change that setting when another alphabet assigns z a normal digit value.

Can I paste Ascii85 data with angle-bracket delimiters?

The decoder recognizes the <~ and ~> wrapper around Ascii85 content. Keep the encoded body intact. Non-alphabet filtering can remove unrelated characters, but it cannot determine whether a damaged block originally contained different data.