Base64 encoder & decoder

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). It is widely used to encode binary data for transmission over systems that only handle text — such as embedding images in HTML, encoding attachments in emails, or passing binary data in JSON APIs.

When to use Base64

• Embedding images directly in HTML or CSS as data URIs
• Encoding binary file attachments in email (MIME)
• Passing binary data in JSON or XML APIs
• Storing binary data in text-only systems like environment variables
• Basic HTTP authentication headers (Authorization: Basic base64(user:pass))

Base64 vs Base64 URL

Standard Base64 uses + and / characters, which have special meaning in URLs. Base64 URL encoding replaces these with - and _ respectively, making it safe to use in query parameters and JWT tokens without URL encoding.

API access

Encode: POST /api/v1/datatools/encode/base64 with body {"input": "your text"}

Decode: POST /api/v1/datatools/decode/base64 with body {"input": "dG9vbHBhZA=="}