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Encode plain text to Base64 or decode Base64 back to text — instantly, in your browser. Supports standard and URL-safe Base64.
Enter text to encode in the left panel.
Fast, private, and supports both standard and URL-safe Base64.
Switch between encode and decode mode with one click — works both ways instantly.
Output updates as you type — no submit button, no waiting.
Toggle URL-safe mode to replace + and / with - and _ — safe for use in URLs and filenames.
See the byte size of both input and output — useful when working with binary data limits.
Invalid Base64 input shows a clear error message instead of silent failures.
All processing uses the native browser btoa/atob APIs. Nothing is sent to any server.
Base64 converts binary data to ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's used to embed images in CSS, transmit binary data over text protocols, and store data in JSON.
Standard Base64 uses + and / characters which have special meaning in URLs. URL-safe Base64 replaces them with - and _ for safe use in URLs and filenames.
No. Base64 is encoding, not encryption. Anyone can decode it. For security, use actual encryption (AES, RSA) — not Base64.
From binary encoding to full API design — we help teams build robust, production-ready systems.
Disclaimer: This tool is provided for informational and educational purposes only. Preview renderings are approximations and may differ from actual platform displays due to platform updates, caching, or rendering differences. We fetch publicly available metadata and do not store or share your URLs. Platforms may cache old data even after you update your content—use their official debug tools to refresh caches. ZIRA Software is not liable for any decisions made based on this tool's output.