Base64 Encoder & Decoder — Free Online Base64 Tool

Encode any text to Base64 or decode a Base64 string back to text — Unicode-safe and runs locally in your browser.

Input

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What it does

Base64 Encoder converts text to and from Base64 using the browser's btoa/atob with full UTF-8 handling, so emojis and accents work correctly.

When to use it

Use it for inspecting JWTs, embedding small binary blobs in JSON, decoding email headers or debugging API payloads.

Benefits

Full Unicode (UTF-8) support
One-click encode and decode
Clear errors on invalid Base64
Private — runs entirely in your browser

Example

Encoding 'Olá!' returns T2zDoSE= — paste it back and decode to round-trip safely.

Frequently asked questions

Is Base64 encryption?: No — Base64 is encoding, not encryption. Anyone can decode it. Never use it to hide secrets.
Why did decoding fail?: The input is not valid Base64. Check for missing padding (=) or stray characters.
Does this support binary files?: This tool focuses on text. For files use a dedicated file-to-Base64 converter.

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