Base64 Encode & Decode
Encode text and files to Base64 format and decode Base64 strings back to clean UTF-8 text or file assets.
How to Use the Base64 Encode & Decode
- Type or paste text into the input box, or use "Upload File" to convert a file into a Base64 data URI.
- Click "Encode to Base64" to encode the input, or "Decode Base64" to turn a Base64 string back into text.
- Copy the result. Encoded images also show a live preview.
Base64 Encode & Decode Features
- Bidirectional text encode and decode
- File to Base64 data URI converter
- Unicode and UTF-8 safe handling
Frequently Asked Questions
What is Base64 encoding used for?
Base64 represents binary data using only plain ASCII characters, so it can travel safely through systems built for text. Common uses include email attachments, data URIs that embed images in HTML or CSS, binary fields in JSON, and HTTP Basic authentication headers.
Is Base64 a form of encryption?
No. Base64 is an encoding, not encryption. Anyone can decode it instantly, so never rely on it to protect passwords or other secrets.
Does it support Unicode text and emoji?
Yes. Text is converted to UTF-8 before encoding, and decoded output is read back as UTF-8, so accented characters, non-Latin scripts, and emoji are preserved.
Why is Base64 output larger than the original?
Base64 uses 4 characters to represent every 3 bytes of data, so encoded output is about 33% larger than the original.