Base64 Decoder Online — Decode Base64 to Text
Decode Base64 into readable UTF-8 text online. Inspect encoded API values, tokens and test data locally in your browser without uploading them.
About this tool
The decoder converts a standard Base64 string back into bytes and interprets the result as UTF-8 text. It is intended for text payloads; arbitrary binary Base64 may not produce readable characters.
How to use
- Paste a Base64-encoded text value into the input.
- Select Convert to decode the bytes as UTF-8.
- Review and copy the readable result, checking that it matches the expected character encoding.
Features
- Decodes standard Base64 text with UTF-8 support.
- Handles padded Base64 values used by common APIs.
- Keeps encoded and decoded text on your device.
Common use cases
- Inspect encoded API fields and webhook samples.
- Decode Basic Authentication test values.
- Recover readable text from Base64 configuration data.
Common issues and tips
- A Base64 value containing image, archive or encrypted bytes will not decode into readable text.
- Base64URL replaces + and / with - and _ and may require URL-safe decoding instead.
Privacy
The Base64 value and decoded text stay in your browser and are not uploaded.
Frequently asked questions
Why is the decoded result unreadable?
The source may contain binary data, use a character encoding other than UTF-8, be encrypted, or not be Base64 at all.
Can this decode JWT tokens?
JWT segments use Base64URL rather than standard Base64. Use the JWT Decoder to inspect the header and payload safely.
Does decoding verify that the data is trustworthy?
No. Base64 has no signature or integrity check. Treat decoded content as untrusted input.