Base64 Encode & Decode Online — Free, Instant, No Install

How to encode or decode Base64 online

Paste your text into the left panel, then click 'Encode' to convert it to a Base64 string. To go the other way, paste a Base64 string and click 'Decode' to get back the original plain text.

The tool handles full Unicode — emoji, accented characters, and non-Latin scripts all encode and decode correctly using UTF-8.

Everything runs in your browser. Your data is never sent to a server or stored anywhere — safe for tokens, credentials, or any sensitive payload.

Frequently asked questions

How do I encode text to Base64 online?

Paste your text into the input box on this page and click 'Encode'. The Base64 result appears instantly — no account, no install, no cost.

How do I decode a Base64 string without installing software?

Paste the Base64 string into the input box and click 'Decode'. This tool runs entirely in your browser — nothing to download or install, works on any device.

Why is my Base64 string not decoding correctly?

Base64 strings must contain only the characters A–Z, a–z, 0–9, +, /, and = (for padding). If your string was copied with line breaks, spaces, or extra characters, remove them and try again. A string that was encoded with a different character set (not UTF-8) may also decode to garbled text.

What is Base64 used for?

Base64 is used to represent binary or arbitrary data as plain ASCII text. Common uses include embedding images in HTML/CSS via data URIs, encoding binary data in JSON payloads, and passing data through systems that only handle text (such as email or URLs).

Can I encode non-English text and emoji?

Yes. The tool encodes your input as UTF-8 before applying Base64, so any Unicode character — emoji, accented letters, Arabic, Chinese, and more — is handled correctly.

Is Base64 the same as encryption?

No. Base64 is encoding, not encryption — it is trivially reversible by anyone. Do not use Base64 to hide sensitive information. For security, use a proper encryption algorithm.