Base64 Encoder & Decoder Online (Free Text & Data Converter)
Encode plain text to Base64 or decode Base64 strings back to readable text online. Fast, client-side, and 100% free developer tool running directly in your browser.
Conversion Mode
Select encoding or decoding mode.
How to Use
- Select encoding or decoding mode
- Enter text to encode
- Enter Base64 string to decode
- Click Encode or Decode button
- Copy and use the result
What is Base64?
Base64 is a method of encoding binary data into ASCII strings. It is used to safely transmit or store text, images, files, etc.
Main Uses:
- Email attachment encoding
- Binary data transmission in web APIs
- Storing binary data in databases
- Including binary data in URLs or JSON
๐ก Note: All processing is done directly in the browser, and text is not sent to the server, making it completely safe.
Why Use an Online Base64 Encoder & Decoder?
Base64 turns bytes into ASCII so text-only channels (JSON, some APIs, MIME) can carry them. This page converts a text string: UTF-8 bytes to standard Base64, or Base64 back to UTF-8 text. It is encoding, not encryption, and there is no file-upload encoder for images or binaries.
Choose Encode or Decode, then click the button. Conversion runs in your browser with JavaScript (TextEncoder/TextDecoder and btoa/atob). Text is not sent to Toolo's servers. Very large strings can still fail in the browser because encoding spreads UTF-8 bytes into fromCharCode.
Key Features & Benefits
Built for local text โ Base64 conversion with UTF-8:
Client-Side Processing
Encode and decode run in the browser. Input is not uploaded or saved on a remote server. Pasting secrets still has local risks (extensions, shoulder surfing); the page itself does not transmit the payload.
UTF-8 Text Support
Plain text is encoded as UTF-8 before Base64. Decode treats the bytes as UTF-8. There is no separate charset picker.
Encode or Decode Mode
Switch between Text โ Base64 and Base64 โ Text, then click to convert. Results do not update live as you type. Decode accepts standard Base64 (AโZ, aโz, 0โ9, +, /, padding =). URL-safe Base64 (-, _) and strings with spaces or line breaks are rejected.
Free, No Account
Use it without a login or paid daily cap. There is no coded quota in the form. Huge pastes can still hit browser limits.
Frequently Asked Questions (FAQ)
Is Base64 an encryption method for data security?
No. Base64 is an encoding format for representing bytes as ASCII. Anyone can decode it without a secret key. Do not treat it as a way to hide credentials.
Is my API token or confidential text safe when pasted into this tool?
The conversion runs in your browser with JavaScript and is not sent to a Toolo server. That is not the same as a secure vaultโavoid pasting production secrets if you do not trust the device or browser extensions.
Does Toolo support UTF-8 character encoding in Base64?
Yes for this text tool. Encode uses UTF-8 bytes; decode reads those bytes as UTF-8, so Korean, other alphabets, and emoji in the text box round-trip. File binaries and non-UTF-8 payloads are not a separate mode.