# Base64 Encoder & Decoder

Encode UTF8 text, decode strict Base64 and inspect binary results as hex.

[Open this tool](https://whatson.pk/developer-base64-calculator/)

Category: Developer & Data

Base64 represents bytes as text. It does not make a message confidential.

Choose encoding or decoding and inspect whether the decoded bytes form readable UTF8.

## Inputs and controls

* Mode: Encode text; Decode Base64
* Alphabet: Standard Base64; Base64url
* Text or encoded data

## How to use

* Choose mode and alphabet.

* Paste or enter text or encoded data.

* Select Process input. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Binary results are shown as hexadecimal rather than being executed or displayed as markup.


## Before relying on the result

Decoded invalid UTF8 or control bytes are shown as hexadecimal. Binary bytes are not rendered as HTML. Canonical padding is checked.


## Tool limitations

Decoded invalid UTF8 or control bytes are shown as hexadecimal. Binary bytes are not rendered as HTML. Canonical padding is checked.

## Questions

### Why can a decoded result appear as hex?

Invalid UTF8 or control bytes are not safely readable text. Hex preserves a view of those bytes.

### What should I check before using Base64 Encoder & Decoder?

Check Mode, Alphabet and Text or encoded data. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-04T16:58:29+00:00

This profile describes the tool. It does not execute it or supply a professional certification.