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Text ↔ Base64 Converter

Convert Text ↔ Base64 quickly, easily, and for free

Text to Base64

Result

Result based on the provided information

Base64 to Text

Result

Result based on the provided information

Related Features

Base64 ↔ Text
Base64 ↔ File
Base64 ↔ Binary

Text to Base64 and Base64 to Text Converter – Online, Fast, and Free

Need to convert text to Base64 or decode Base64 to text simply, quickly, and securely?

Fastools offers a free online Base64 converter that instantly transforms any text into Base64 and vice versa—directly in your browser, with no sign-ups or downloads.

Just enter your text or Base64 code, select the desired mode, and click 'Convert' to get the result instantly.

Our tool is ideal for programmers, students, IT professionals, security analysts, web developers, and anyone who needs to encode or decode Base64 quickly.

How to use the Text to Base64 Converter?

  • 1️⃣ Type or paste the text you want to convert.
  • 2️⃣ Click 'Convert to Base64'.
  • 3️⃣ Copy the automatically generated result.

How to use the Base64 to Text Converter?

  • 1️⃣ Enter the Base64 code in the provided field.
  • 2️⃣ Click 'Convert to Text'.
  • 3️⃣ Instantly view the decoded original text.

Why use Fastools’ Base64 converter?

  • ✅ Completely free and online
  • ✅ Instant conversion between Text and Base64
  • ✅ Supports plain text, long sentences, and special characters
  • ✅ Ideal for programmers, students, and IT professionals
  • ✅ Works directly in the browser—no downloads or sign-ups
  • ✅ Full security: no data is sent to the server

Benefits of using our Base64 conversion tool

  • 🔐 Security: conversion happens locally on your device
  • ⚡ Speed: instant results with no waiting
  • 🎯 Full accuracy in encoding and decoding
  • 💻 Compatible with any device: computer, tablet, or smartphone

What is Base64 and what is it used for?

Base64 is an encoding method used to convert binary data into ASCII text. It’s widely used in programming, APIs, data transmission, file storage as text, JSON, XML, and secure web communication.

Base64 encoding ensures that any data—including special characters, emojis, or raw bytes—can be transmitted without risk of corruption or data loss.

Base64 use cases

  • ✔ Sending data via APIs and Web Services
  • ✔ Storing images and files in JSON
  • ✔ Encoding credentials in HTTP Basic Auth
  • ✔ Converting texts with special characters

Conclusion

Start converting text to Base64 and Base64 to text now—practically, quickly, and completely securely with Fastools.

What Is Base64?

Base64 is an encoding method that converts any data—such as text, images, files, or bytes—into a safe ASCII character string. This technique was created to allow binary data to be sent through systems that only accept text, like emails, URLs, and APIs.

The name "Base64" comes from the fact that the encoding uses a set of 64 distinct characters to represent any data.

What Is Base64 Used For?

Base64 encoding is widely used to transmit data securely and compatibly between systems, especially when binary content cannot be sent directly.

  • Embedding images or files directly in HTML and CSS.
  • Transmitting data in REST APIs.
  • Storing binary data in text-only databases.
  • Sending email attachments in a standardized format.

How Does Base64 Encoding Work?

Base64 conversion works by splitting the original data into 3-byte blocks, which are converted into four 6-bit groups. Each 6-bit group is then mapped to one of the 64 allowed characters.

As a result, Base64-encoded text is about 33% larger than the original content, but ensures data compatibility and integrity during transmission.

Base64 Character Table

The encoding uses uppercase letters, lowercase letters, digits, and two special symbols:

Characters: A–Z, a–z, 0–9, +, /

Padding: The '=' character is used to pad blocks when needed.

How to Convert Text to Base64?

To convert text to Base64, the content is first converted into bytes. These bytes are then processed by the Base64 algorithm to produce the encoded representation.

Simple Example

Original text: "Olá"

Base64 result: T2zDoQ==

Note that the result includes the '=' character at the end, used as padding to maintain the correct block size.

How to convert Base64 to text?

The reverse process involves decoding the Base64 sequence and reconstructing the original bytes, which are then converted back into text.

Example

Base64: T2zDoQ==

Decoded text: "Olá"

Behavior with files

When files such as images, PDFs, or documents are converted to Base64, the entire binary content is transformed into encoded text. This allows files to be sent via forms, APIs, and JSON without risking content corruption.

Practical applications of Base64

  • Embed images directly in HTML using 'data:image/...;base64'.
  • Send files via API in a safe format.
  • Reduce transmission errors when sending binary data.
  • Store image thumbnails in the database.

Did you know?

  • Base64 is not a form of encryption—it was not designed to protect data.
  • It’s common to confuse Base64 with security, but anyone can decode its content.
  • Encoding increases file size, but ensures portability.
  • It’s used internally in many programming languages and protocols.

Important

Base64 must not be used as a security, encryption, or sensitive data protection method. It is intended only to transport and represent information in a system-compatible textual format. If you need to protect a file or message, use proper encryption.