HomeAll ToolsCoursesInterview PrepBlogAbout

Base64 Encoder / Decoder

Encode text or data to Base64 and decode Base64 strings back to plaintext — instant, offline, UTF-8 safe.

Input
Output
Result appears here…

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A–Z, a–z, 0–9, +, /). It is widely used for encoding data in HTTP headers, JWT tokens, data URIs, and email attachments (MIME).

How to use this Base64 tool

  • Type or paste text in the input box
  • Click Encode to convert to Base64
  • Click Decode to convert Base64 back to plaintext
  • Use URL-safe Encode for Base64url (replaces + with - and / with _)

Common uses

  • Embedding images in HTML/CSS as data URIs
  • Encoding binary data in JSON or XML payloads
  • HTTP Basic Authentication credentials
  • JWT token encoding (header and payload sections)

FAQ

Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode a Base64 string without a key. Do not use it to hide sensitive data.
Why does Base64 end with == sometimes?
Base64 pads the output with = characters to make its length a multiple of 4. One or two trailing = signs are normal.

Other browser-based encoders and decoders developers use alongside Base64.

📋
JSON Formatter

Format, validate and minify JSON with instant error detection.

🌐
URL Encoder/Decoder

Percent-encode URLs or decode percent-encoded strings instantly.

🔐
JWT Decoder

Decode JWT tokens and inspect header, payload, and expiry.

🛡️
Password Generator

Generate cryptographically strong passwords with custom rules.