Base85 & ASCII85 Codec

Convert between Base85 and plain text both ways.

Runs locallyNo signupMobile readyCopyableFree

⇋Base85 & ASCII85 Codec

All processing happens locally

Input

Operation

Use Adobe delimiters <~ ~>

Result

Base85 & ASCII85 Codec is a tighter alternative to Base64 encoding, processing runs locally in your browser, so your input never reaches a server.

Results update as you change values; copy or download when ready.

Paste or type your content into the input field at the top, or press the sample button to load demo data.
Adjust the options below the input, such as output format, separators, letter case or precision.
Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
When the result looks right, use the copy button in the corner, or download it as a local file.

Clean up stray spaces and line breaks before pasting for more accurate results.

How is Base85 better than Base64?+

Base85 represents 4 bytes with 5 printable characters, so the payload grows to about 1.25x instead of Base64's 1.33x.

Adobe vs standard variant?+

The Adobe variant wraps data in <~ ~> and uses z for four zero bytes; the standard variant has neither. Decoding auto-detects which one you pasted.

Is Base85 & ASCII85 Codec free to use?+

Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.

Is the text I enter uploaded anywhere?+

No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.

Does Base85 & ASCII85 Codec work on a phone or tablet?+

Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.

Can I copy the result into my own document?+

Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.