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Base64 Encoder

Encode Unicode text or files into Base64 in your browser.

Local processingYour input stays hereSimple controls

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Input
0 characters · 0 bytes
Output
0 characters · 0 bytes

Text uses UTF-8. Base64 is an encoding, not encryption. The decoder accepts UTF-8 text, not arbitrary binary files.

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Processed locally in your browser

Your input does not need to be uploaded to an EvryNest server. Nothing is saved automatically.

How It Works

  1. 1
    Enter text or a file

    Paste Unicode text or choose a local file up to 1 MB.

  2. 2
    Encode bytes

    Convert UTF-8 text or raw file bytes into Base64.

  3. 3
    Use the encoding

    Copy or download the Base64 result.

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Frequently Asked Questions

How does Base64 Encoder work?

Text is encoded as UTF-8 before Base64. File mode encodes raw bytes and accepts files up to 1 MB.

Does this tool upload or save my input?

Core processing happens locally in this browser tab. Input and output are not sent to a processing server or stored automatically. Copy and download only occur when you request them.

What happens with large or invalid inputs?

Input limits and errors are shown in the workspace. JSON supports up to 1 MB and 100 nesting levels; large previews can be truncated while downloads retain the full result.