Base64 Encoder Decoder Online
Encode plain text to Base64 or decode Base64 strings back to readable text. Useful for debugging tokens, config values, and API payloads.
How To Use
- Paste or generate the content in the tool area.
- Run the primary action such as validate, encode, decode, or generate.
- Review the result, error message, or expiration viewer.
- Copy or download the output for development use.
Best Practices
- Keep sensitive production secrets out of online tools.
- Validate generated output before using it in production.
- Prefer local, browser-only utilities for quick debugging.
- Save repeatable examples as fixtures for future tests.
Common Mistakes
- Confusing encoding with encryption or signature verification.
- Copying stale output after changing input.
- Ignoring parser errors that point to a specific syntax location.
- Using identifiers or decoded tokens as security secrets.
FAQ
What is Base64 encoding?
Base64 converts binary or text data into ASCII characters so it can safely travel through text-based systems.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it without a password.
Can I decode Base64 text here?
Yes. Paste a Base64 string and click Decode to convert it back to UTF-8 text.
Does this tool upload my data?
No. Encoding and decoding run in your browser only.
Why does Base64 sometimes end with equals signs?
Equals signs are padding characters used to make the encoded output length align correctly.
Can this handle Unicode text?
Yes. The tool uses UTF-8 safe encoding and decoding for regular text.
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