Base64 Encoder & Decoder

Encode and decode Base64 without leaving the page.

Paste text or Base64, choose a direction, and get a clean copyable result for testing and debugging.

Input

Mode

Base64 result

VGVtcEtpdA==

JSON API

/api/tools/base64-encoder-decoder

POST JSON to this endpoint using the same field names as the form. Invalid input returns a structured 400 response.

curl -X POST https://tempkit.8u.ee/api/tools/base64-encoder-decoder -H 'Content-Type: application/json' -d '{"mode":"encode","input":"TempKit"}'

TempKit uses Java Base64 codecs on the server, validates invalid decode input, and keeps the form usable without JavaScript.

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