AnkhKit

Base64 String Encoder & Decoder Online

Runs 100% in your browser — your files never leave your device.

Base64 shows up everywhere: data URIs, email attachments, JWT segments, config files. Type text to encode it, paste base64 to decode it — both directions work live, with optional URL-safe alphabets and automatic data: prefix stripping. Unicode text round-trips correctly, and nothing you paste leaves the page.

How it works

  1. 1

    Type or paste

    Encode plain text or decode a base64 string — both panels work live.

  2. 2

    Toggle URL-safe if needed

    URL-safe mode swaps +/ for -_ and drops padding.

  3. 3

    Copy the result

    One click copies the encoded or decoded output.

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Base64 File Encoder & Decoder Online Encode any file to a base64 string or turn base64 back into a downloadable file — free, in your browser, with no upload involved.

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