Encode text to Base64 or decode Base64 strings. Supports Unicode characters.
Encode anything
Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used for encoding data in URLs, email attachments, and API payloads. This tool supports Unicode characters and processes everything locally in your browser.
A Base64 Encoder/Decoder converts text and files to and from Base64 — a way of representing binary data using only plain ASCII characters. Reach for it when you need to inline an image into CSS or HTML, embed a file inside a JSON or config payload, decode a JWT segment or an email attachment, or just inspect a Base64 string someone handed you. Everything runs entirely in your browser, so whatever you paste or drop never leaves your device.
Base64 represents binary data as a string of 64 ASCII characters (A–Z, a–z, 0–9, plus + and /, with = for padding). It lets you safely move or store binary content inside text-only contexts like JSON, HTML, CSS, URLs, and email.
No. Base64 is encoding, not encryption — it provides no security or secrecy. Anyone can decode it back to the original instantly, so never use it to protect sensitive data; use it only for transport and formatting.
Yes. This tool runs 100% in your browser. Whatever you paste, type, or drop is processed locally on your device — nothing is uploaded, sent to a server, stored, or tracked.
Yes. You can encode a file into a Base64 string (handy for data URIs and embedding) and decode a Base64 string back into the original file to download. Because the work happens in your browser, very large files use more time and memory.
Yes, it is completely free to use with no sign-up required, and it works the same for both encoding and decoding.
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