Base64 Encoder / Decoder

What is Base64 Encoder / Decoder?

Base64 Encoder/Decoder converts text and data snippets to and from Base64 for transport-safe encoding in APIs and headers. It helps developers inspect tokens, payload fragments, and encoded strings quickly.

Base64 encode/decode runs locally in your browser with no network upload.

How to use Base64 Encoder / Decoder

1. 1Choose Encode or Decode mode.
2. 2Paste your source text or Base64 input.
3. 3Run conversion and review output instantly.
4. 4Copy result for use in code, headers, or test fixtures.

Examples

hello@example.com -> aGVsbG9AZXhhbXBsZS5jb20=

eyJyb2xlIjoiYWRtaW4ifQ== -> {"role":"admin"}

Tips & common mistakes

• Base64 is encoding, not encryption; do not treat it as a security layer.
• Use UTF-8 aware workflows when handling non-English characters.
• Strip accidental whitespace/newlines before decoding long strings.

Who uses this tool?

• •Preparing Basic Auth credential segments for testing.
• •Inspecting encoded config values in logs and environment files.
• •Converting binary-ish payload fragments for API debugging.

Frequently asked questions

Is Base64 secure for storing passwords?

No. Base64 is reversible encoding, not cryptographic protection. Use proper hashing for passwords.

Why does my decoded output look garbled?

The input may represent binary data or use a different charset. Ensure you decode with the correct expected format.

What is Base64 URL-safe encoding?

URL-safe Base64 replaces '+' and '/' with '-' and '_' and may omit '=' padding for URL contexts.

Can I decode JWT segments with this?

Yes, JWT header and payload are Base64URL encoded. Convert with URL-safe handling for accurate output.

Why do some Base64 strings end with '='?

The '=' character is padding added to align data length to Base64 encoding blocks.