HomeImage Base64 Converter

Image Base64 Converter

Convert images to Base64 strings or restore Base64 to images. Supports PNG, JPG, GIF, WebP, SVG

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Supports: PNG, JPG, GIF, WebP, SVG, BMP (All processing done locally)

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About Image Base64 Converter

Image to Base64 converter is a practical tool designed for developers to convert binary image files into Base64-encoded ASCII text strings. This process is called Data URI Scheme, which allows visual assets to be directly embedded into HTML markup, CSS stylesheets, or JSON data payloads, eliminating the need for separate file requests.

Conversely, this tool can efficiently decode Base64 strings back into visual image files. It supports a wide range of formats including PNG, JPG, GIF, WebP, and SVG. This bidirectional conversion capability makes it an essential tool for front-end development, mobile app data simulation, and debugging binary data transmission.

Security and performance are our top priorities. All conversions are performed entirely in your browser using JavaScript. Your images never actually leave your device, ensuring absolute privacy for sensitive assets. The tool is optimized to handle common web image sizes instantly without server latency.

Key Features

  • Bidirectional conversion: Seamlessly switch between image to Base64 and Base64 string to image.
  • Multiple output formats: Generate raw Base64, complete Data URI, standard HTML <img> tag, or CSS background-image rule.
  • Instant preview: Visually verify input images and decoded results with file details (size, dimensions, MIME type).
  • Client-side privacy: Zero server uploads. All processing happens in your local browser memory.
  • Wide format support: Compatible with PNG, JPEG, GIF, WebP, SVG, and BMP formats.
  • Smart input parsing: Decoder automatically strips headers or HTML tags to find and process actual Base64 data.

Common Use Cases

  • Web optimization: Embed small icons or logos directly into HTML/CSS to reduce HTTP requests and improve page load speed.
  • Email templates: Embed images in newsletters to ensure offline loading and bypass external image blocking policies.
  • Data portability: Store small images in JSON or XML databases, avoiding cumbersome binary file storage.
  • CSS styling: Create standalone UI components with built-in background patterns or icons.
  • Prototyping: Quickly insert placeholder images into code without managing asset folders.
  • Debugging: Verify integrity by decoding Base64 strings returned by APIs back into visual images.

Output Format Reference

FormatExampleUsage
Raw Base64iVBORw0KGgoAAAANS...API requests, database storage, custom processing
Data URIdata:image/png;base64,iV...JavaScript image source, dynamic image loading
HTML IMG Tag<img src="data:...">Direct embedding in HTML documents
CSS Backgroundbackground-image: url(data:...);Background images in stylesheets

Frequently Asked Questions (FAQ)

What is Base64 image encoding?
Base64 is a binary-to-text encoding scheme that represents binary data (such as images) as ASCII string format. It converts image data into printable character sequences, making it possible to efficiently transmit or store it in plain text systems (HTML, JSON, XML).
Does Base64 increase file size?
Yes. Base64 encoding typically increases file size by approximately 33%. This is because every 3 bytes of binary data are represented by 4 bytes of ASCII text. Therefore, it is recommended to use only for small icons or logos (e.g., below 10KB-15KB).
When should I use Base64 images?
Use Base64 for small images (icons, logos, tiny patterns) to eliminate additional HTTP server requests (reducing latency). It is also suitable for single-file HTML pages or email templates where external file dependencies are problematic.
Does this tool support transparent images?
Yes. If your original image (such as PNG, WebP, or GIF) has transparency, Base64 encoding will perfectly preserve it. When decoded or displayed via Data URI, transparency remains intact.
Will my image data be sent to your servers?
No. This tool runs entirely on the "client side". The conversion logic is executed using JavaScript in your web browser. Your image files are never uploaded to any server, ensuring complete data privacy.
What is a Data URI?
Data URI (Uniform Resource Identifier) is a scheme that allows inline inclusion of referenced data. For images, it looks like `data:image/png;base64,iVBORw...`. Browsers interpret this string directly as an image file.
How to fix a "broken image" after decoding?
This usually happens if the Base64 string is incomplete or corrupted. Make sure you copied the entire string. Also, check if the input string contains headers (e.g., 'data:image/png;base64,') - sometimes correctly removing or adding them can solve the problem.
What is the browser compatibility of Base64 images?
Base64 images (Data URI) are supported by all modern browsers (Chrome, Firefox, Safari, Edge) and IE8+. They are a standard component of today's web technology.
Can I convert Base64 back to an image file?
Yes. Use the "Base64 → Image" tab in this tool. Paste your string, and we will decode it and generate a downloadable image file for you.
Is there a size limit for images?
Technically, Base64 strings can be very long. However, browsers have memory limitations, and extremely large strings (e.g., >5MB) may cause page lag. We recommend using Base64 for small resources to maintain browser performance.

Data is processed locally in your browser by default and will not be uploaded to any server. Upload will be clearly indicated if required.

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