Base64 Encode & Decode

Between Base64, text and files

Base64 turns binary data such as images or files into a string made of just 64 characters (A–Z, a–z, 0–9, +, /) plus =. It's used wherever only text can travel: email attachments, images embedded in JSON or HTML (data URIs), API auth headers, JWT tokens. This tool converts in all three directions right in your browser.

Text ↔ Base64

Text is encoded as UTF-8 bytes first, so results match other tools and languages (Python, Java, the Linux base64 command). “URL-safe” replaces + and / with - and _ and drops trailing =, so the result can go in URLs and file names (JWT style). Decoding handles URL-safe Base64 and line breaks automatically; if the decoded data isn't text, you'll be told to save it as a file.

File → Base64, Base64 → file

Drop an image, PDF or font to get Base64 or a data URI like data:image/png;base64,… — handy for embedding small icons in CSS or HTML. Base64 is about 33% larger than the original, so it's not ideal for big files. Paste a Base64 string or data URI to save it as a file: the type (PNG, JPG, GIF, PDF, ZIP…) is detected from the header bytes and images are previewed.

Base64 is an encoding, not encryption — anyone can decode it. Never rely on it to hide passwords or personal data. All conversions happen on this device.