Convert any text or file to Base64 and decode Base64 strings back to readable text. Everything runs locally in your browser — your data is never uploaded anywhere.
The fastest way to encode and decode Base64 online — free, instant and completely private. Paste any text to encode it to Base64, or paste a Base64 string to decode it back to readable text. Use the File tab to convert any file to Base64. Everything runs locally in your browser — your data is never sent to any server.
Base64 is an encoding scheme that converts binary data into ASCII text using 64 printable characters. It is used to safely transmit binary data over systems that only handle plain text, like email or JSON APIs.
No. Base64 is encoding, not encryption. Anyone can decode it instantly without a key. Never use Base64 to protect sensitive information.
All encoding and decoding happens in your browser. Your text and files are never uploaded to any server.
A–Z, a–z, 0–9, + and / (64 characters), plus = as padding. URL-safe Base64 replaces + with - and / with _.
Base64 encodes every 3 bytes into 4 characters, making output ~33% larger than the original.
Yes. Any binary file — images, PDFs, audio, video — can be Base64 encoded as long as your browser has enough memory.
No. Base64 is encoding only — anyone can decode it instantly without a password or key.