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Base64 & URL Encoder / Decoder

Encode or decode UTF-8 text, Base64URL and URL escapes, with binary Base64 file support and strict validation.

Private by design

Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.

FormatOperation

Binary file mode · up to 1 MB

Input0 / 200,000 characters

Output

Encoding is not encryption. Text uses UTF-8. URL decoding leaves + as a literal plus. Binary output is downloaded as .bin for safety.

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How to use Base64 & URL Encoder / Decoder

Choose Base64, Base64URL, URL component or full URL, then encode or decode.
Paste text, or use binary file mode for Base64 data.
Copy or download the complete result. Binary decoding produces a safe .bin download.

Read the detailed guide →

What are the limits of Base64 & URL Encoder / Decoder?

Text up to 200,000 characters; binary files and decoded data up to 1 MB. Text decoding requires valid UTF-8. Encoding is not encryption. URL decoding treats plus signs literally and does not implement form-urlencoded decoding.