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ToolNest AI
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Base64 Encoder

Encode and decode Base64 strings and files instantly.

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About Base64 Encoder

Encode plain text, URLs, or binary files to Base64 format — and decode Base64 strings back to their original form. Supports file encoding for embedding images in HTML/CSS and encoding API payloads.

Frequently Asked Questions

Base64 is used to encode binary data (like images) for embedding in HTML/CSS, transmitting over text-based protocols, and API authentication headers.

Yes, you can upload any file and encode it to Base64. Common uses include embedding images as data URIs.

Text encoding has no practical limit. File encoding supports files up to 5MB.

All encoding and decoding is done client-side in your browser. Nothing is sent to our servers.

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