Base64 Encoder
Encode any text or data to Base64 format.
About Base64 Encoder
Base64 Encoder converts text or a small file into Base64, the ASCII-safe representation used in data URLs, JSON payloads and email attachments.
Encoding happens in your browser, so API keys and tokens never reach a server.
How to use Base64 Encoder
- 1
Paste or drop input
Type text or choose a file. Binary files are read locally.
- 2
Choose the variant
Standard Base64 or URL-safe (replaces + and / with - and _).
- 3
Copy the output
Copy to clipboard or download the encoded text.
Questions about Base64 Encoder
Is Base64 encryption?
No. It is reversible encoding, not security. Anyone can decode it.
How much larger does it get?
About 33% larger, because 3 bytes become 4 characters.
Is my data uploaded?
No. Encoding runs entirely in the browser.
When should I use URL-safe Base64?
When the value goes into a URL, filename or JWT, where + and / would break parsing.
Related tools
Last updated November 2026. Files are processed on FilePlume's own hardware and deleted within 60 minutes; nothing is used for training.