Base64 Decoder

Paste Base64, Base64URL or a Data URI to recover text and binary bytes. Check UTF-8, inspect errors and download the decoded output in your browser.

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Add your input, adjust the options and run the tool.

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How to use this tool

01

Add your input

Paste text or choose a file. Try the example to get started.

02

Choose your options

Decode standard Base64, Base64URL and Data URIs. Inspect text and raw bytes without losing binary data.

03

Inspect and export

Review the processing notes, then copy or download the result. Continue with another tool if needed.

A practical guide to Base64: bits, padding and validation

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