Base64 Encoder/Decoder
Convert text to Base64 and back. Full UTF-8 support for all languages.
UTF-8 supportInstant conversionNo signup
Mode
Text stays on your device
Documentation
What is Base64?
An encoding that converts binary data to ASCII text using A-Z, a-z, 0-9, +, and /.
Use cases
Email attachments, data URLs, embedding images in CSS/HTML, API authentication tokens.
How to use
- 1) Paste your text.
- 2) Click Encode or Decode.
- 3) Copy the result.
FAQs
What is Base64?
An encoding scheme converting binary to ASCII text using 64 characters.
When is it used?
Email, data URLs, embedding images, API tokens.
Does encoding change size?
Yes, output is ~33% larger than original.
Does it support UTF-8?
Yes. Full UTF-8 support for all languages.
Does it store my text?
No. All processing is local.
Is it free?
Yes. Completely free.
Privacy: All processing runs in your browser. Nothing is stored.
Last updated: 2026-08-04
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