Base64 Encoder
Encode any text to Base64 online, free and instantly. Type or paste plain text, JSON, or binary-derived strings and this tool converts them to standard Base64 using correct UTF-8 handling — all inside your browser.
How Base64 encoding works
Base64 turns each group of 3 bytes into 4 printable ASCII characters from a 64-character alphabet. That makes binary or textual data safe to transport through protocols and formats that only accept simple text, such as JSON, query strings, or email.
This encoder first converts your input to UTF-8 bytes, so characters such as accented letters, emoji, and other-language alphabets are encoded accurately rather than corrupted. The output is standard Base64, optionally ending with padding ("=") as needed.
How to encode to Base64 online
- Open the free Base64 Encoder tool from DataFormatter.
- Paste the text, JSON string, or value you want to encode.
- The Base64 output appears instantly in the editor.
- Use Copy or Download to grab the encoded result.
Common uses
- Encoding JSON strings before placing them in URLs or query parameters
- Storing binary-like values inside JSON payloads
- Embedding small images as data URIs
- Representing tokens and identifiers in a transport-friendly form
Frequently asked questions
What is Base64 encoding used for?
Base64 encodes binary or text data into a safe ASCII string, commonly used for embedding data in URLs, JSON payloads, emails, and HTTP headers where raw bytes are not allowed.
How is text converted to Base64?
This tool encodes the input as UTF-8 bytes first, so it handles letters, numbers, and Unicode like emoji and non-Latin scripts correctly, then converts the bytes to Base64.
Is Base64 encoding the same as encryption?
No. Base64 is not encryption — it only changes the representation so anyone can decode it. Do not use Base64 to protect sensitive data.