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Developer Tools

Base64 Encoder/Decoder

Encode text and files to Base64 format or decode Base64 strings back to readable text. Supports images with live preview and data URL generation — everything runs locally in your browser.

Free · No sign‑up Added Jun 2026

Base64 Converter

Why use this Base64 Encoder/Decoder

Built for the moment you need to move text or a small file between a binary-unsafe channel (a URL, JSON, an email) and back, without installing anything.

Nothing leaves your browser

Encoding and decoding run entirely client-side in JavaScript. Your text and files are never uploaded to a server.

Image preview built in

Encode an image file and see it rendered live from its own Base64 data URL, so you can confirm it round-trips correctly.

Text and files, one tool

Switch between encoding plain text and encoding an uploaded file without leaving the page.

How it works

Pick Text or File

Choose whether you're encoding/decoding plain text or uploading a file.

Paste or drop your input

Enter text to encode, a Base64 string to decode, or drag a file into the upload zone.

Copy the result

The encoded or decoded output appears instantly — copy it with one click.

Frequently asked questions

Is my file or text uploaded anywhere?

No. Encoding and decoding happen entirely in your browser using built-in JavaScript APIs. Nothing is sent to a server, logged, or stored.

What is Base64 actually for?

Base64 turns binary data (like an image) into plain ASCII text, so it can safely travel through systems that only handle text — like embedding an image directly inside CSS, HTML, or JSON.

Why did decoding fail?

The input needs to be a valid Base64 string (only letters, numbers, +, /, and = padding). Extra whitespace, line breaks, or a truncated copy-paste are the most common causes of a decode error.

Is there a file size limit?

No hard limit is enforced, but very large files may be slow to encode depending on your device, since everything runs in-browser rather than on a server.

Overview

What Is Base64 Encoder/Decoder?

Encode and decode text and files to/from Base64 format instantly. Support for images with preview. Perfect for data encoding and API development

User Guide

How To Use Base64 Encoder/Decoder

  1. 1 Open the Base64 Encoder/Decoder interface in your desktop or mobile browser.
  2. 2 Input or upload your source data, file, or parameters into the designated workspace fields.
  3. 3 Adjust any optional configuration settings or conversion toggles according to your requirements.
  4. 4 Click the primary action button to generate your output instantly.
  5. 5 Copy the resulting text, code snippet, or formatted file directly to your clipboard or local device.
Capabilities

Key Features of Base64 Encoder/Decoder

100% Free & Unlimited Usage

No registration, subscriptions, or hidden limits. Process as many files or items as you need.

Privacy-Focused Processing

All operations execute locally in your client web browser. Your sensitive files and data never touch external servers.

Cross-Platform Compatibility

Fully responsive design optimized for desktop workstations, laptops, tablets, and smartphone displays.

Instant Real-Time Output

Zero server queuing delays. Results are calculated and rendered immediately upon user input.

Client-Side Privacy & Security Guarantee

Your privacy is our priority. Base64 Encoder/Decoder executes processing entirely within your browser environment. Your input data, text, files, and credentials are never transmitted to external servers or stored in remote databases.

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FAQ

Frequently Asked Questions

What is Base64 Encoder/Decoder?
Encode and decode text and files to/from Base64 format instantly. Support for images with preview. Perfect for data encoding and API development
Is Base64 Encoder/Decoder free to use?
Yes, Base64 Encoder/Decoder is completely free. There are no hidden charges, no subscription, and no credit card required. Just open the tool and start using it instantly.
Do I need to create an account to use Base64 Encoder/Decoder?
No account or signup is required. You can use Base64 Encoder/Decoder immediately without registering. Just visit the page and the tool is ready to use.
Does Base64 Encoder/Decoder work on mobile and tablet?
Yes, Base64 Encoder/Decoder is fully responsive and works on all modern devices including smartphones, tablets, and desktops. Any up-to-date browser is supported.
Does Base64 Encoder/Decoder process my data on a server?
No. Base64 Encoder/Decoder runs entirely in your browser using JavaScript. Your code and data are never sent to or stored on any server, keeping your work private and secure.
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