Base64 Encoder/Decoder
Encode and decode Base64 text in the browser for API payload fragments, Data URL examples and copied configuration values.
Tool Workspace
Processing is intended to run locally in your browser whenever possible. Avoid pasting production secrets, access tokens, private keys or sensitive business data into any online tool unless you fully understand the risk.
Ready. Processing runs in your browser.
Core Features
- Encode plain text into Base64.
- Decode Base64 into readable text.
- Show common padding and character issues.
- Support quick API payload inspection.
How to Use
- Paste plain text when encoding or Base64 text when decoding.
- Choose Encode or Decode based on the direction you need.
- Review the result for invalid characters or unreadable output.
- Copy the result only after checking the input format.
Common Errors
- Missing padding characters.
- Confusing Base64 with encryption.
- Decoding binary data as readable text.
- Using URL-safe Base64 in a normal decoder without adjustment.
Real Developer Use Cases
- Inspecting API payload fragments.
- Preparing small Data URL examples.
- Debugging encoded configuration values.
Technical Explanation
Base64 is an encoding format that represents binary or text data using ASCII characters. It is useful for transport, not secrecy. Encoded data grows in size and can still reveal sensitive content after decoding. Developers use Base64 tools to inspect payloads, build examples and verify whether a string is encoded as expected.
FAQ
Is my input uploaded to your server?
Tool input is processed in the browser for these utilities unless a page explicitly states otherwise.
Can I use this with production secrets?
Do not paste production passwords, private keys, access tokens or sensitive business data into any online tool unless you fully understand the risk.
Why does this page include explanations below the tool?
Developer Data Tools is designed to help users understand the data problem, not just transform input and output.