Base64 Encoder / Decoder

Convert text strings or local image binaries into Base64 format, or decode Base64 outputs back to readable plain text.

Source Data input

Plain Text Input:

Encode Image to Base64

Select Local Image:

Base64 Output Output

What is Base64 Encoding and Why is it Used?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It translates bytes into a set of 64 characters (comprising A-Z, a-z, 0-9, +, and /), making it safe for transmission over network protocols that only support text characters.

Developers frequently use Base64 to embed small assets (like icons, CSS styles, or small images) directly inside HTML or XML files using data URLs, reducing the number of external file requests required to load a page.

Frequently Asked Questions (FAQ)

Q: Why did my Base64 decoding fail?

A: Base64 strings must contain correct padding indicators (like ending equal signs =) and only comprise valid characters within the 64-character alphabet. Ensure no extra spaces are present.

Q: How do you handle special unicode characters (like emojis or non-English letters)?

A: Traditional browser methods fail on UTF-8 characters. This tool utilizes custom escaping functions to guarantee your unicode characters encode and decode correctly without errors.

Q: What size limits exist for encoding image files?

A: Since processing runs entirely in the browser memory stack, we suggest keeping image uploads under 5MB to avoid browser crashes.