Base64 Encoder/Decoder

About Base64 Encoder/Decoder

Convert text to Base64 or decode Base64 back to readable text instantly. Everything happens locally in your browser for speed and privacy—no uploads, no tracking. Base64 is a simple way to represent binary data using only text characters, which makes it safe to include in places that don’t support raw bytes.

How to use

• Type or paste plain text, then choose “Encode to Base64” to generate an encoded string
• Paste a Base64 string and choose “Decode from Base64” to see the original text
• Use Copy to grab the output, Clear to reset, and Swap to move output back to input

Common uses

• Embedding small images or fonts as data URIs in CSS or HTML
• Including attachments or content safely in email (MIME)
• Transmitting text‑safe payloads in systems that strip or escape binary data

Notes and limitations

Base64 is an encoding, not encryption. It does not hide content—anyone can decode it—so do not use it for secrets or passwords. Standard Base64 may include the + and / characters and uses = for padding; this tool uses the common browser implementation. If you need URL‑safe Base64 (often called base64url, which replaces + and / with - and _), convert after encoding or use a dedicated base64url tool.

Example: the word “hello” becomes aGVsbG8= in Base64. Decoding that string produces the original text again, byte‑for‑byte.