Base64 Encode / Decode
Encode or decode Base64 strings online for free. Convert text to Base64 and back instantly. No signup, no server — 100% browser-based.
Encode and Decode Base64 Strings Instantly
Encode or decode Base64 strings online for free. Convert text to Base64 and back instantly. No signup, no server — 100% browser-based. AllToolsFree processes everything locally in your browser using JavaScript and WebAssembly — your files are never uploaded to any server. This makes it one of the most private and secure free online tools available.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a way to represent binary data as ASCII text. It is commonly used in emails, data URLs, and API payloads.
Is this tool safe for sensitive data?
Yes. Everything is processed locally in your browser. No data is ever sent to a server.
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