DevTilt

Base64 Encode

Convert plain text to standard Base64 (RFC 4648). Encoding uses UTF-8 bytes in your browser — nothing is uploaded.

Result

Paste text, then Encode. Processing stays in your browser.

How to encode text to Base64

  1. Paste or type the text to encode.
  2. Click Encode, or press Ctrl+Enter (Cmd+Enter on Mac).
  3. Copy or download the Base64 string.
  4. Encoding uses UTF-8 bytes (RFC 4648) in your browser.

What is Base64 Encode?

Base64 turns arbitrary bytes into ASCII-safe text for HTTP headers, JSON fields, and data URIs. This encoder uses UTF-8 for text input and produces standard RFC 4648 output with padding — the format most APIs and libraries expect.

Why use DevTilt's Base64 Encode?

  • UTF-8 text encoding before Base64 conversion
  • Standard RFC 4648 alphabet with padding
  • Instant encoding on paste or button click
  • Copy and download encoded output

Common use cases

  • Encoding a Basic Auth credential string for an API header
  • Preparing a text payload for a data URI in HTML or CSS
  • Encoding JSON or XML for embedding in a query parameter
  • Creating Base64 test fixtures for integration tests

FAQ

Base64 turns binary or text bytes into an ASCII string using A–Z, a–z, 0–9, +, /, and = padding. It is common in APIs, data URIs, and email attachments.
Yes. Text is encoded as UTF-8 bytes before Base64. Unicode and emoji round-trip correctly when you decode with the matching Base64 Decode or Base64 to Text tools.
No. Encoding runs entirely in your browser. Your input never leaves the device.
Padding keeps the encoded length a multiple of four characters. One = means two input bytes were left over; two = signs mean one leftover byte. Some APIs accept unpadded Base64, but standard RFC 4648 includes padding.
No. Base64 is encoding — anyone can decode it. Use proper encryption or signing when you need secrecy or integrity. Base64 only makes binary data safe to paste into text.