Toolkeel

Base64 encoder and decoder

Convert text to Base64 and back, including emoji and non-Latin scripts, or encode a whole file. Useful for APIs, email attachments and config files.

  • Free
  • Private
  • No sign-up
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  1. Your text and dataRead from your device
  2. Worked on in this tabBy code running in your browser
  3. Ready to copyNothing is stored

Never sent to a server. See how to check

How to use it

  1. Paste text (or choose a file).

  2. Select Encode or Decode; tick URL-safe if needed.

  3. Copy the result.

About this tool

Base64 represents any data using 64 safe characters (A–Z, a–z, 0–9, + and /), so it can travel through systems that only handle text. Text is converted to UTF-8 bytes first, so accents, Arabic and emoji round-trip correctly, which naive converters often get wrong. Base64URL replaces + and / with - and _ and drops the = padding, as used in JWTs and web addresses.

Base64 is an encoding, not encryption: anyone can decode it. Never use it to hide passwords.

Good to know

  • Files up to 20 MB.
  • Decoded binary data (such as images) cannot be shown as text; use Image to Base64 for images.

Frequently asked questions

Is Base64 encryption?

No. It is a reversible encoding that anyone can decode. Use proper encryption for secrets.

Why does my decoded text look garbled?

The data may not be text, or it was encoded from a different character set than UTF-8.

What is Base64URL?

A variant that uses - and _ instead of + and / and omits padding, so it is safe in URLs and file names.

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Last updated 2026-10-20 by the Toolkeel team. How we build and check our tools.