What is Base64 encoding?

Base64 encoding is a binary-to-text translation scheme that represents binary data in an ASCII string format. It is commonly used to embed images directly in CSS or HTML documents and transmit data through text-based protocols like email.

What is the difference between URL encoding and HTML encoding?

URL encoding replaces unsafe query characters with percent signs and hex numbers (e.g. '%20' for spaces) to create safe URLs. HTML encoding replaces characters like ' ' with character entities (e.g. '<' or '>') to prevent browsers from executing text as HTML markup.

Does converting an image to Base64 increase its file size?

Yes. Base64 encoding represents binary data using 6 bits per character, resulting in an approximate 33% increase in character payload size compared to raw binary files.

Are my files uploaded to your servers for conversion?

No. All text, URL, HTML, and image conversions run client-side in your local browser memory using JavaScript. None of your data, keys, or files are uploaded to our servers.

Can I convert large images to Base64?

Yes, our tool supports image conversions up to several megabytes. However, since Base64 adds overhead, it is best recommended for small SVG icons, logos, and UI graphics.

Base64 & Encoding Tools

8 Tools

Base64 string encoders, image data URI converters, URL encoders, and HTML entity converters. Perform all text and asset encoding locally in your web browser.

Text to Base64

Encode plain text or UTF-8 strings into ASCII Base64 format.

Base64 to Text

Decode Base64 strings back to readable UTF-8 text.

Image to Base64

Convert image files (PNG, JPG, SVG, WebP) into Base64 Data URI code.

Base64 to Image

Decode Base64 Data URI strings into downloadable image files.

HTML Encode

Convert HTML characters into entity encodings for display.

HTML Decode

Convert HTML entity strings back to raw markup tags.

URL Encode

Encode special characters into URL percent-encoding.

URL Decode

Decode percent-encoded URL strings back into standard text.

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Benefits of Client-Side Text and File Encoding

Instant Conversion: No latency or queues. Operations compute in milliseconds using standard JavaScript encoders.
Complete Privacy: Your text payloads, images, and API keys are never uploaded to any remote server or cached in external databases.
Data URI Compilation: Easily generate Base64 code to embed images, SVGs, or custom logos directly in stylesheets or HTML documents.
Perfect Format Compliance: Built on top of official encoding algorithms, ensuring perfect character conversions.

How to Choose the Right Encoding Tool

Select the utility that corresponds to the specific data type and target protocol:

Standard Text & Strings

Use the Text to Base64 or Base64 to Text tools to encode and decode UTF-8 string keys.

Embedding Graphic Files

Use the Image to Base64 converter to load images and compile clean CSS Data URI assets.

Web APIs and HTML Pages

Use the URL Encode and HTML Encode tools to escape queries and markup parameters.

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Encoding Tools FAQs

Is Base64 a form of encryption?

No. Base64 is an encoding scheme used to represent binary data as text. Anyone can decode a Base64 string back to its original state without a password or key. It does not secure or encrypt data.

Why does URL encoding replace spaces with %20?

Spaces and special characters are reserved in standard HTTP URL structures. URL encoding replaces spaces with percent-encoded representations (%20) to ensure URLs parse correctly on servers.

What is the btoa() and atob() methods in Javascript?

These are native browser functions: 'btoa()' encodes binary strings to Base64, and 'atob()' decodes Base64 strings back into raw text characters.

Will encoding a large file crash my web browser?

No, our tools process files incrementally in RAM. While files up to 20MB are converted smoothly, extremely large assets might experience short lags depending on device specifications.

Are UTF-8 characters supported during Base64 encoding?

Yes. Our Text to Base64 utility automatically converts string inputs to UTF-8 byte arrays before executing the Base64 conversion, ensuring emojis and non-English characters compile safely.

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