Base64 Encoder & Decoder
Convert text to Base64 and back, instantly. UTF-8 safe, works with emoji — and your data never leaves your browser.
Encode and decode Base64 safely
Base64 is a way of representing data using only plain text characters, so it can be embedded in HTML, CSS, JSON, emails and data URLs without breaking. This tool encodes text into Base64 and decodes it back, fully UTF-8 aware so special characters survive the round trip. Everything runs on your device, so sensitive strings stay private.
Frequently asked questions
Is my data uploaded to a server?
No. Encoding and decoding happen entirely in your browser — your data never leaves your device.
What is Base64 used for?
Base64 turns text or binary data into plain ASCII characters, so it can travel safely through systems built for text — like embedding images in HTML/CSS, or including data in JSON, emails and data URLs.
Does it support special characters and emoji?
Yes. This tool is UTF-8 safe, so accented letters, non-Latin scripts and emoji encode and decode correctly.
Why does decoding sometimes fail?
Decoding only works on valid Base64. If the input has extra characters or is incomplete, you'll see an error so you know it isn't proper Base64.