JSONTech

Base64 Encode/Decode

Encode text to Base64 or decode Base64 back to text with full Unicode support

Input

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Output

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Frequently Asked Questions

Base64 encodes binary data into ASCII text using 64 printable characters (A-Z, a-z, 0-9, +, /). It's used to embed binary data in text-based formats like JSON, XML, HTML, and email. The encoded output is roughly 33% larger than the input.

Paste your text in the input field and click Encode. The tool converts each character to its UTF-8 bytes and then to Base64 representation. Click Copy to grab the result.

Common uses include: embedding small images in CSS/HTML (data URIs), sending binary data in JSON APIs, encoding file contents for upload, email attachments (MIME), and storing binary data in text-only databases.

Standard Base64 uses + and / characters, which need escaping in URLs. Base64URL replaces these with - and _ and removes padding (=). JWTs use Base64URL encoding because tokens are often passed in URLs.