Base64 Encode
Encode text or files to Base64 in your browser
How It Works
Select Your File
Upload, drag & drop, or paste directly from clipboard.
Configure Options
Set quality level and output format.
Download Result
Processed entirely in your browser. Download instantly.
About Base64 Encode
Encode plain text or binary file content to Base64 format instantly in your browser. Base64 encoding is widely used in data URLs, email attachments (MIME), JWT tokens, and API payloads. Paste text or drop a file to encode. Toggle between standard Base64 and URL-safe Base64 (RFC 4648 section 5) which replaces + with - and / with _ for safe use in URLs and filenames. The encoded output can be copied with one click. No data is sent to a server –all encoding uses the browser's native atob/btoa API and FileReader. Handles text in UTF-8 and binary file content.
Frequently Asked Questions
What is URL-safe Base64?
URL-safe Base64 replaces + with - and / with _ so the output can be safely included in URLs without percent-encoding.
Can I encode a file, not just text?
Yes. Drop any file to encode its binary content to Base64.
What is Base64 used for?
Data URLs for images in CSS/HTML, email attachments, JWT token payloads, and embedding binary data in JSON.