Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. Supports file uploads and URL-safe mode.
Drop a file here or click to browse
Any file type. Encoded entirely in your browser.
What is Base64?
Base64 is a binary-to-text encoding that represents binary data using 64 printable ASCII characters. It is commonly used to embed images in HTML/CSS, transmit data in URLs, and encode email attachments.
URL-Safe Mode
Standard Base64 uses + and / which are reserved in URLs. URL-safe Base64 replaces them with - and _, and strips padding = characters.
Privacy First
Everything runs in your browser. No data is sent to any server. Your text and files never leave your machine. Safe for encoding secrets, tokens, and sensitive data.
Frequently Asked Questions
Common questions about Base64 Encoder
Type or paste your text in the input field and click Encode. The Base64-encoded output appears instantly. You can copy it with one click. The tool handles UTF-8 text including special characters and emoji.
Paste the Base64 string in the input field and click Decode. The original text is recovered instantly. If the Base64 contains binary data (like an image), the tool will show the raw bytes or offer a preview.
Standard Base64 uses + and / characters which have special meaning in URLs. URL-safe Base64 replaces them with - and _ so the encoded string can be safely used in URLs, query parameters, and filenames without escaping.
Yes. Drag and drop any file or click to browse. The file is read in your browser and converted to a Base64 string. This is useful for embedding images as data URIs, sending binary data in JSON, or encoding attachments.