Base64 Encode/Decode
Base64 encode or decode text strings and files easily. Support secure processing for binary/text files.
Drop text file or binary file here
or click to browse
Max 50 MB
How to use base64 encode/decode
- 1
Input Content
Enter your text or upload any binary or text file.
- 2
Select Operation
Choose Encode to translate to Base64, or Decode to convert from Base64.
- 3
Convert
Click the Encode/Decode button to perform the operation instantly.
- 4
Download Output
Copy the result to clipboard or download it as a file.
About the Base64 Encode/Decode
Base64 turns arbitrary binary data into a text string made up of only letters, digits, and a handful of symbols, which is why it shows up wherever a system expects plain text but the payload isn't text — email attachments (MIME), image data embedded directly in CSS or HTML as data URIs, and the header/payload segments of a JWT are all Base64 under the hood.
It's important to be clear that Base64 is an encoding, not encryption: anyone can decode it back to the original bytes instantly, so it should never be used to hide sensitive data, only to make binary data safely transportable through text-only channels. This tool handles both directions and works on pasted text or uploaded files, so you can decode a JWT segment to inspect its claims or encode a file for embedding without leaving the browser.
Frequently Asked Questions
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format, often used to encode data embedded in HTML, CSS, or JSON.
Can I encode images or other binary files?
Yes. Our tool fully supports uploading binary files up to 50MB and converting them into Base64 format.
Are my files uploaded to the server?
Files are sent to our lightweight, rate-limited local Go service, processed in memory, and immediately sent back to you. We never save your files.