Base64 Encoder / Decoder
Encode and decode Base64 strings, files, and images — all in your browser.
or click to select
Decode Base64 to File
or click to select (PNG, JPG, GIF, WEBP, SVG)
Key Features
Frequently Asked Questions
Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It is commonly used to embed binary data in text-based formats like JSON, XML, HTML, email, and Data URIs.
No, Base64 is not encryption. It is an encoding scheme designed for data representation, not security. Anyone can decode a Base64 string without a key. Do not use Base64 to protect sensitive information.
Yes! This tool fully supports UTF-8 encoding, which means Chinese, Japanese, Korean, emoji, and all other Unicode characters are handled correctly during Base64 encoding and decoding.
Since all processing happens in your browser, there is no server-imposed limit. However, very large files (over 50 MB) may cause your browser to slow down depending on your device's memory. For best performance, keep files under 10 MB.
Absolutely. All encoding and decoding is performed entirely in your browser using JavaScript. No data is ever sent to any server. Your files, text, and images remain completely private on your device.
Yes, this tool is 100% free with no ads, no signup, no login, and no usage limits. It runs entirely in your browser so your data stays private. There are no hidden fees or premium tiers — every feature is available to everyone.