base64baboon
100% Local

Base64 Encoder

100% local. No uploads. No storage.

Runs in your browser Your data stays on your device No tracking
0 characters · 0 bytesUTF-8
0 charactersReady when you are
Ctrl + Enter
Only your browser sees your input.
Advanced options

Options apply to encoding text and files. Decoding accepts standard and URL-safe Base64, with or without padding, and ignores whitespace. Data URLs always use standard, padded Base64 without wrapping.

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Choose the right Base64 output

Standard Base64 uses letters, digits, + and /, with = padding when needed. Use it when an API or format asks for Base64. The output describes bytes; it does not encrypt them or keep them secret.

  1. Paste text into the editor, or choose Files to read a local file.
  2. Keep the defaults for standard Base64. Advanced options offer URL-safe output, optional padding, and 64- or 76-character lines.
  3. Select Encode, then copy the result or save it as a text file.

Base64 Encoder example

Hello WorldSGVsbG8gV29ybGQ=

These eleven UTF-8 bytes become sixteen Base64 characters, including one padding character.

Raw Base64 or a Data URL?

Most API fields expect raw Base64. A Data URL also includes a media type and a data: prefix. In Files, enable Include Data URL prefix only when the destination expects a complete Data URL. This option always produces standard, padded, unwrapped Base64.

All conversions run locally in your browser. No input, files, filenames, or results are uploaded or saved by Base64Baboon. Copies and downloads you request are yours to manage. Read the privacy details. Base64 is encoding, not encryption.

THE SHORT ANSWERS

Base64 Encoder FAQ

Why is the output larger?

Base64 uses four characters for every three input bytes, rounded up to a complete group. Expect roughly 33% overhead before line breaks or a Data URL prefix.

Should I enable line wrapping?

Keep No wrapping for most API and JSON values. Choose 64 or 76 characters only when the receiving format requires it.

Can I encode private data?

The converter makes no network requests and does not save input. Base64 itself offers no secrecy: anyone with the result can decode it.

Turn text or file bytes into Base64 for APIs, text-based formats, and developer debugging. Everything is encoded locally.