Convert text or small files to Base64 and back for data URLs, API payloads, CSS embeds, and email-safe transport — entirely in your browser. Encoding is not encryption: decoded strings are as sensitive as the original bytes, so avoid pasting secrets on shared screens. Drop a supported file within the size limit or paste text, choose encode or decode, then copy the result. Executable-style extensions are blocked to reduce accidental handling of risky binaries in the sandbox.
No. Base64 is encoding, not encryption. Anyone can decode it. Use proper cryptography when confidentiality matters.
It represents binary as ASCII using 4 characters for every 3 bytes, so encoded size grows by roughly one third.
The tool restricts risky extensions to reduce accidental handling of malware payloads in the browser sandbox.