Base64 Encoder / Decoder

Encode any text to Base64, or decode Base64 back to text. Supports standard and URL-safe variants.

Input URL-safe

Output

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Notes

Standard Base64 uses +, /, =. URL-safe replaces them with -, _ and drops padding.
Supports Unicode text via UTF-8 encoding.

About Base64 Encoder / Decoder

Base64 is an encoding that converts arbitrary binary data into a safe ASCII representation using a 64-character alphabet (A–Z, a–z, 0–9, plus + and /) with = padding. It is not compression: the output is roughly 33% larger than the original bytes, but it guarantees that data survives transport through text-only channels. This tool encodes text as UTF-8 and decodes Base64 back to the original string.

Reach for Base64 when you must embed or transmit binary data inside text-based protocols: email attachments, data URIs in HTML and CSS, or binary blobs in JSON fields. The URL-safe variant replaces + and / with - and _ and strips the = padding, so the output can appear safely in URLs, query strings, and filenames. Remember that Base64 is an encoding, not encryption — anyone can decode it, so never rely on it to protect secrets or passwords.