What is the size difference between raw text and Base64 output?

Base64 encoding expands data size by approximately 33% because every 3 bytes (24 bits) of raw data are mapped into 4 ASCII characters (6 bits each).

Is my encoded or decoded data sent to external servers?

Never! All Base64 conversions execute 100% locally in your browser memory using native Web APIs. No text, tokens, or files are ever logged or uploaded.

USETOOLX

Launch Studio

Base64 Encoder & Decoder

100% Local · No Uploads

Encode and decode plain text or data strings to Base64 format with UTF-8 safety.

Interactive Studio

100% In-Browser RAM Execution

RAM Sandbox Active•100% Client-Side. Zero server telemetry or data retention.

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Simple Workflow

How to Use Base64 Encoder & Decoder in 3 Simple Steps

Select Encode or Decode mode.

Enter or paste your text.

Instant result will appear with one-click copy.

100% Client-Side Privacy

Your data and files never leave your device. Everything processes strictly in local browser RAM memory with zero server tracking.

Zero-Lag Execution Engine

Built on client-side memory, Canvas API, and high-speed Gemini Cloud AI for instantaneous, frictionless output.

Common Questions

Frequently Asked Questions

Yes. Unlike standard window.btoa which throws errors on non-ASCII characters, our engine uses UTF-8 byte encoding via TextEncoder and Uint8Array, ensuring emojis, Asian scripts, and binary byte streams are encoded and decoded safely.