Base64 Decoder

Decode Base64 to text — locally in your browser.

Tool

Paste your input and get output instantly. Everything stays in your browser.

URL-safe input

Status Ready

✓ Runs locally

✓ No uploads

✓ No tracking

What the tool does

The Base64 Decoder transforms Base64-encoded strings back into readable plain text. It supports large payloads and works instantly without requiring any backend processing.

When to use it

Use this tool when inspecting encoded API responses, debugging authentication headers, decoding configuration values, or analyzing Base64 strings found in logs, JWTs, or data exports.

Quick example

You paste c2VjcmV0X3ZhbHVl and immediately see secret_value.

Security / privacy

Decoding is performed entirely client-side. No Base64 input is uploaded, cached, or transmitted. This is critical when handling encoded credentials, internal data, or production payloads that must remain private.