Base64 Decoder
Decode Base64 blobs or URL-safe strings back into readable text or binary output. The tool keeps everything local, so you can safely review encoded payloads, copy the decoded content, or download the raw bytes without leaving your browser.
What is a Base64 decoder?
A Base64 decoder takes an encoded Base64 string and converts it back into its original text or binary data. This is useful when you receive encoded content from an API, a config value, a token payload, or another tool and need to inspect what it actually contains.
Because Base64 is widely used in transport and embedding workflows, encoded strings show up often in development and operations work. A decoder helps you reverse that representation quickly without writing a script just to inspect the content.
How to decode Base64 data
Enter the source text or file, choose the relevant mode or algorithm, and let the tool produce the output immediately. This is useful when you need a reliable result without switching contexts to a custom script or another utility.
Because the output is generated in a focused workflow, it is easier to inspect, copy, and compare than ad hoc manual handling. That makes small technical tasks faster and reduces routine mistakes.
Frequently Asked Questions
The input accepts standard Base64 text including strings that use hyphens and underscores instead of plus and slash when the URL safe switch is active. The tool also ignores whitespace so you can paste formatted blobs from emails or logs. If the toggle is off it keeps the original characters intact and adds the required padding before decoding.