Base64 Encoder & Decoder
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text instantly. Free, private — everything runs in your browser, nothing is uploaded.
What is Base64?
Base64 converts binary data into plain ASCII text, so it can travel safely through text-based systems like email, URLs, JSON and HTML. It is an encoding, not encryption — anyone can decode it.
Common uses
- Embedding images in HTML/CSS as data URIs.
- Encoding API keys and tokens in HTTP headers.
- Debugging JWT tokens and email attachments.
Frequently asked questions
Is Base64 secure? No — it is easily reversible. Never use it to “hide” passwords or secrets.
Does it handle Unicode/emoji? Yes — this tool correctly encodes UTF-8 text including emoji.
Is my data uploaded? No — encoding happens locally in your browser.