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.
Related Developer Utilities
Formatting code and token outputs? Pretty-print API data arrays with the JSON Formatter, extract parameters using the URL Parser, convert unix timestamps in the Epoch Converter, or adjust casing using the Text Case Utility.
Professional Services
Need a complete branding package, customized website development, or organic search campaigns? Partner with our design & engineering team to scale your business.
Common Questions
A Base64 converter is a utility that allows you to translate raw binary data or text strings into an ASCII-safe representation (Base64 encoding) and decode them back to their original state.
It groups binary bits of the input text into 6-bit chunks, representing each chunk as one of the 64 characters in the Base64 alphabet (A-Z, a-z, 0-9, +, /). It uses '=' for padding.
No, Base64 is merely an encoding scheme for data serialization and transmission. It does not hide information or provide security, as anyone can decode it instantly without a key.
Paste your Base64 encoded string into the input area, click the decode button, and our tool will translate the character blocks back to the original UTF-8 or ASCII text.
Yes, all conversion computations happen locally within your browser using JavaScript. No network calls are executed, ensuring complete data privacy for your encoded information.
Yes, this tool can convert standard text and data files. Base64 is widely used to embed images directly into HTML, CSS, or JSON payloads without separate asset requests.
Because the tool runs directly inside browser memory, it can handle several megabytes of text efficiently. Extremely large datasets might experience performance limits based on browser constraints.
It prevents binary data from being corrupted during transmission through legacy networks (like SMTP for emails) that only support standard text characters.
Standard Base64 contains '+' and '/' characters, which have special meanings in URLs. A URL-safe variant replaces these with '-' and '_' respectively to prevent URL parsing errors.
No. The encoder works client-side. Your inputs, outputs, and intermediate strings remain on your local machine and disappear as soon as you close or refresh the tab.