What is the difference between Base64 and URL-safe Base64?

URL-safe Base64 replaces + with - and / with _ so the output can be safely used in URLs and filenames without percent-encoding.

Can I encode files with this tool?

Yes — drag and drop any file to encode it to Base64. Useful for embedding images in HTML/CSS as data URLs.

Is there a file size limit?

No server-side limit since everything runs in your browser. Large files (100MB+) may slow down your browser.

Base64 Encoder / Decoder

Encode and decode Base64 text and files instantly

DeveloperFREEYour data never leaves your browser

Base64 Encoder / Decoder is a free, browser-based tool that lets you encode and decode base64 text and files instantly — with zero signup, zero installation. Your data never leaves your browser. Part of 86+ free developer and business tools at wowhow.cloud, built and maintained by a team with 14+ years of hands-on development experience.

URL-safe Base64Wrap at 76 chars (MIME)

Drop a file or click to upload — encode any file to Base64