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Base64 Encoder & Decoder Online – Encode and Decode Instantly
Encode text to Base64 or decode Base64 strings online for free. Full UTF-8 support. Instant, browser-based, secure. No signup required. Try now!
✅ 100% Free⚡ Instant Results🔒 No Signup📱 Mobile Friendly🔐 No Data Stored
Text → Base64
Try an example:
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Common Use Cases
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HTTP Authentication
Encode username:password credentials to Base64 for HTTP Basic Authentication headers.
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Inline Images
Embed images as Base64 data URIs in HTML and CSS to eliminate extra HTTP requests.
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API Tokens
Encode API keys and secrets for safe transmission in HTTP Authorization headers.
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JWT Decoding
Decode the header and payload sections of JWT tokens to inspect claims and expiration times.
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Email Encoding
Understand MIME email encoding — attachments are Base64-encoded binary transmitted as text.
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Binary in JSON
Encode binary file contents as Base64 strings for storage in JSON fields and databases.
Frequently Asked Questions
What is Base64 encoding used for?
Encoding binary data as text for HTTP headers, email attachments, data URIs, and API authentication tokens.
Is Base64 the same as encryption?
No — Base64 is encoding, not encryption. It is easily reversible and provides no security protection.
Does it handle Unicode and emoji?
Yes — full UTF-8 support for all languages, symbols, and emoji characters.
Is my data safe?
Yes — all encoding/decoding runs in your browser. Your data is never sent to any server.
What does Base64 look like?
A string of letters (A–Z, a–z), numbers (0–9), plus (+), slash (/), and equals (=) padding.