Base64 Encoder
Free online Base64 encoder and decoder. Encode and decode Base64 strings with standard and URL-safe encoding. Works with text and files. Local browser processing, no signup.
How to Use Base64 Encoder
- 1Paste text or upload a file to encode, or paste Base64 string to decode
- 2Choose between standard and URL-safe encoding
- 3Click Encode or Decode button
- 4Copy the result to clipboard
Frequently Asked Questions
What is the difference between standard and URL-safe Base64?
URL-safe Base64 replaces the + character with - and / with _ to avoid issues when used in URLs, filenames, and query parameters. Standard Base64 uses + and / characters which can cause problems in URLs and some file systems.
Can I encode files to Base64 or only text?
Both are supported. Paste text directly or upload any file - the tool converts binary files to Base64 strings that can be embedded in JSON, HTML img tags, CSS data URIs, API requests, and more.
What is Base64 commonly used for?
Base64 is used for embedding images and files in HTML and CSS, sending binary data in JSON APIs, email attachments, storing binary data in text-based config files, and many other situations where binary data needs to be represented as text.
Is Base64 Encoder free, and do I need to sign up or upload my files?
Base64 Encoder is 100% free to use with no signup, no registration, and no usage limits. All processing happens locally in your browser - your files and data never leave your device, so no upload is required and your privacy is fully protected.