Base64 Encoder & Decoder – Secure Text Converter

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary or binary-safe data using a set of 64 ASCII characters (A–Z, a–z, 0–9, +, /). It is widely used to safely transmit binary data over text-based media such as HTTP headers, JSON fields, and email bodies — which were originally designed to handle only printable ASCII characters.

Common use cases include embedding image data in CSS (data:image/png;base64,…), encoding API credentials for HTTP Basic Authentication, storing binary data in JSON payloads, and encoding file attachments in emails (MIME).

How to Encode or Decode Base64

Select the mode using the toggle button above — Encode (text → Base64) or Decode (Base64 → text). Paste your input into the left panel. The result appears instantly in the right panel. Click Copy Hash or Copy Decoded to send it to your clipboard.

UTF-8 Support

Many Base64 tools fail with non-ASCII characters. metatool.in's implementation uses the encodeURIComponent / decodeURIComponent technique to properly handle the full range of Unicode characters — including Hindi, Arabic, Chinese, and emoji — before encoding.

Frequently Asked Questions

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. It is commonly used to safely transmit data over media designed for text.

Base64 is used in HTTP Basic Authentication headers, embedding images in CSS/HTML, storing binary data in JSON, and encoding email attachments.

Yes. metatool.in uses the encodeURIComponent/decodeURIComponent approach to properly handle UTF-8 and multi-byte characters.

Base64 strings must be valid — only characters A–Z, a–z, 0–9, +, / and = padding are allowed. Any other characters will cause a decode error.

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