Base64 encoding is used everywhere in web development — email attachments, data URLs, API authentication, image embedding in HTML and CSS. Our free Base64 tool handles all of it: encode text to Base64, decode Base64 strings back to text, and even convert files (images, PDFs, documents) to Base64 data URLs directly in your browser.
Three Tools in One
- Encode Text — Convert any text string to Base64
- Decode Base64 — Convert Base64 back to readable text
- File to Base64 — Upload any file and get its Base64 data URL — drag and drop supported
100% Private
All encoding and decoding happens entirely in your browser using JavaScript’s built-in btoa() and atob() functions. No data is sent to our servers — ever. This makes it safe to use even for sensitive API tokens or private content.
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🚀 Open Free Base64 Encoder & Decoder Online 2026 →