Base64
Encode and decode Base64 text quickly. Free online developer tool for fast browser-based work.
What is this tool?
Base64 converts text or bytes into an ASCII-safe representation and decodes that representation back to readable text. It is common in data URIs, MIME messages, simple API payloads and debugging logs.
How to use
- Paste plain text to encode or a Base64 string to decode.
- Choose the direction that matches your workflow and check whether the output remains readable.
- Copy the result only after confirming that Base64 is the expected representation, not a security layer.
Practical example
Use Base64 to represent text or binary data in APIs, data URIs and messages that require ASCII-safe content. Base64 is not encryption.
Input:
hello world
Base64 output:
aGVsbG8gd29ybGQ=API
Use the API endpoints for repeatable encode/decode checks in tests, demos and documentation snippets.
When to use
Related tools
Privacy
Avoid decoding or encoding real credentials, private tokens, confidential files or personal data in a browser-based tool.
Frequently asked questions
Is Base64 encryption?
No. Base64 is a reversible encoding format. It provides compatibility, not secrecy.
Why does Base64 output sometimes end with =?
The equals sign is padding used to make the encoded data align to the expected length.
Can I use Base64 for API testing?
Yes, when the API expects Base64 input or returns Base64 output. Keep real secrets out of examples.
Limitations / when not to use
Base64 is encoding, not encryption. Anyone with the value can decode it, so do not use it to hide secrets or protect passwords.