Convert Files & Text To Base64 & Back
Quickly encode images, documents, fonts, or text to Base64 strings. Decode existing Base64 strings back to previewable assets or downloadable files.
Drag and drop any file here
Supports images, fonts, PDF, documents (Max 15MB)
Browse Filesimage.png
24.5 KB • PNG Image
Useful Code Snippets
Why Use Client-Side Base64?
Private & Confidential
Files and data are never sent to external servers. The conversion happens strictly in your browser memory via the File API.
CSS & HTML Snippets
When encoding images, get ready-to-paste CSS background rules and HTML image nodes to speed up your front-end code workflow.
MIME Type Auto-Detection
The decoder reads signatures inside the Base64 header string to auto-detect mime types and offer appropriate file extensions.
Common Questions
It translates binary files (like PNG images, fonts, PDFs) or text strings into a safe ASCII format string beginning with `data:image/...;base64`.
Yes, paste the string into the decoder. It detects the file signature header and generates a downloadable file containing the raw binary buffer.
You can convert images (.png, .jpg, .webp, .svg), fonts (.woff, .ttf), documents (.pdf, .json, .txt), and other binaries up to 15MB.
When you encode an image, copy the CSS Background snippet: `background-image: url("data:image/png;base64,...");` and paste it into your stylesheet.
Yes, because it maps 8-bit bytes to 6-bit characters, the output Base64 ASCII string is approximately 33% larger than the raw binary size.
Yes. All encoding and decoding actions execute locally in your web browser sandbox, meaning nothing is uploaded or shared.