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Base64 encode & decode — offline

Text or files, standard or URL-safe — converted entirely on your device.

100% private — files never leave your device
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Plain text
Base64

How it works

  1. 1

    Choose Text or File mode.

  2. 2

    Paste text/Base64, or pick a file to encode.

  3. 3

    Copy the result, or download decoded Base64 as a file.

Related tools

JWT DecoderDecode and verify tokens — they never leave your browser.URL Encoder/DecoderPercent-encode query values or decode messy URLs.HTML EntitiesEscape markup or decode entities back to readable text.Number Base ConverterBinary, octal, decimal, hex — exact BigInt conversion.

Frequently asked questions

Is my data uploaded to encode or decode it?

No. Base64 conversion happens with your browser's built-in functions — text and files never leave your device.

Does it handle files and unicode text?

Yes — encode any file to Base64, turn Base64 back into a downloadable file, and text mode is fully UTF-8 safe (emoji included).

What is URL-safe Base64?

A variant that replaces + and / with - and _ and drops padding, so the result can live inside URLs and JWTs. Toggle it when encoding; decoding accepts both variants automatically.