No. Encoding and decoding run locally in your browser for normal use. Your data stays in your browser.

Is Base64 encryption?

No. Base64 is an encoding format that represents binary data as ASCII text. Anyone can decode it — it is not a security control.

Can I encode images and PDFs?

Yes. File and Image modes encode the exact file bytes. On decode, images can be previewed when the MIME type is recognized, and any binary can be downloaded.

TEXT TOOLS

Base64 Encoder / Decoder

Encode and decode Base64 text or data

Encode & DecodeText, files, images and more
Fast & SecureInstant conversion
Supports Multiple FormatsText, image, document, audio, etc.
Copy, Download & SaveOne click actions

Your data stays in your browser.

1. Select Operation

2. Input

Characters: 0 | Lines: 0

3. Options

Add line breaks (every 76 characters)Use URL-safe Base64 (replace + / with - _)Remove line breaks on decodeAuto-detect input typePreview changes in real time

Output

Characters: 0 | Lines: 0

About Base64

Base64 is a binary-to-text encoding scheme that converts binary data into ASCII text format. It is commonly used to encode files, images, and other data for safe transmission over the internet. It is not encryption.

Common Examples

Quick Examples

How to encode or decode Base64

Step 1
Choose Encode or Decode
Select whether to convert into Base64 or restore original data.
Step 2
Provide text, a file, image, or URL string
Type or paste text, drop a file, or encode a URL as text — no remote fetch.
Step 3
Tune options
Line breaks, URL-safe alphabet, whitespace stripping, and auto-detect.
Step 4
Copy or download
Copy Base64 text or download decoded binary with the right extension.

Real Base64 encoding — UTF-8 and binary-safe, client-side

OneFileKit encodes text as UTF-8 bytes and files as exact binary bytes. Base64 is an encoding scheme for safe transport — it is not encryption and does not protect secrecy.

Decoding validates alphabet and padding before conversion. Binary results are offered as downloads with MIME sniffing; they are never injected as HTML. Analytics only track aggregate events — never your data.

Related Tools

Frequently asked questions

Is my data uploaded?: No. Encoding and decoding run locally in your browser for normal use. Your data stays in your browser.
Is Base64 encryption?: No. Base64 is an encoding format that represents binary data as ASCII text. Anyone can decode it — it is not a security control.
Can I encode images and PDFs?: Yes. File and Image modes encode the exact file bytes. On decode, images can be previewed when the MIME type is recognized, and any binary can be downloaded.