Base64 Encode / Decode

Base64 Encoder and Decoder guide

The Base64 tool encodes plain text into Base64 and decodes Base64 back into readable text. Base64 is commonly used when binary-safe text is needed in JSON, HTML, email, API examples or configuration values.

Base64 is an encoding, not encryption. Anyone can decode it. Use it for compatibility and transport, not for secrecy.

When to use it

• Decoding API examples, JWT sections or configuration snippets.
• Encoding small text values for tests or documentation.
• Checking whether a string is valid Base64 before using it in code.
• Understanding data URLs and embedded content examples.

How to use it

1. Paste text into the input box.
2. Choose encode to create Base64 or decode to read Base64.
3. Review the output for unexpected characters or decoding errors.
4. Copy the result into your code, request body or documentation.
5. Use the image-specific Base64 tools when working with image data URLs.

Example

hello utilitytools

aGVsbG8gdXRpbGl0eXRvb2xz

Privacy

Encoding and decoding are performed in the browser. UtilityTools.eu does not receive the text you paste.

Limitations and accuracy notes

• Base64 increases size by roughly one third compared with raw bytes.
• It provides no confidentiality or tamper protection.
• Different systems may require URL-safe Base64 variants or padding rules.

FAQ