⚡ CLIENT-SIDE · PRIVATE · SECURE

Base64 Decoder

Decode Base64 payloads, hashes, or encoded certificates into clean, readable UTF-8 text strings. Automatic handling for standard and URL-safe Base64 padding.

Instructions: Paste a Base64 string into the input box to instantly decode it into readable plain text. Includes URL-safe base64 character mapping.

Parameters

Current Mode

🔓 Base64 Decoder

Active

Base64 Options

URL-safe Base64 (replace + with -, / with _)Remove padding (= characters)

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Input Data

Output Result

What is Base64 & URL Encoding?

Base64 Encoding is used to translate binary structures or characters into a safe ASCII string representation. This is commonly used in HTML data URIs, basic authorization headers, or storing encryption keys.

URL Encoding (also known as Percent Encoding) converts special characters in URLs into a valid `%` format (like spaces to `%20`). This prevents query string parameters from breaking browser URLs.

Paste Base64

Input your standard Base64 string or URL-safe Base64 payload into the workspace.

Automatic Decoding

The parser validates padding and translates byte groups into UTF-8 characters instantly.

Copy Plain Text

Copy the decoded string or export it to a file. Safe local processing with zero server calls.

Related Protection Tools

Base64 Encoder

Encode text payloads or tokens into Base64 format.

URL Decoder

Decode percent-encoded URL query parameters.

Data Masking

Obfuscate sensitive credentials and attributes.

Documentation & Guide

How to Decode Base64 Payloads and Strings Online

Discover common Base64 decoding pitfalls, padding requirements, and safe client-side UTF-8 decoding.

Read Guide