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Image to Base64 Converter

Convert images (PNG, JPG, WebP, GIF) to Base64 data URIs for embedding directly in HTML or CSS.

Image to Base64 ConverterGratisImage & MediaRuns in your browser

Click or drag & drop an image

PNG, JPG, WebP, GIF, SVG

Works in your browser. What you paste or upload is processed on your device.

Key features of the image to Base64 converter

  • Converts images up to 5MB to Base64
  • Supports PNG, JPG, JPEG, GIF, WebP, SVG
  • Outputs Base64 string and complete data URI
  • HTML img tag and CSS background-image code snippets
  • Copy to clipboard with one click

How to use the image to Base64 converter

  1. Upload your image

    Click to select or drag and drop your image file.

  2. Convert

    The tool automatically converts the image to Base64 upon upload.

  3. Choose output format

    Select the Base64 string, complete data URI, or ready-to-use HTML/CSS code snippet.

  4. Copy the output

    Click 'Copy' to copy your chosen output format.

  5. Use in your project

    Paste into your HTML, CSS, JSON, or email template.

What is an image to Base64 converter?

The Image to Base64 Converter encodes any image file (PNG, JPG, GIF, WebP, SVG) into a Base64 string or complete data URI format (data:image/png;base64,...). The encoded string can be used directly in HTML img tags, CSS background-image, or any context requiring inline image data without external file references.

Base64 image encoding is used to inline images in HTML emails (where external image blocking is common), embed images in JSON payloads, create self-contained HTML files, and reduce HTTP requests for small, frequently used images like icons and logos.

Why use an image to Base64 converter?

HTML emails block external image loading by default, making Base64 encoding essential for reliable email imagery. Small images embedded as Base64 data URIs also eliminate individual HTTP requests, useful for performance-critical applications where every request counts.

Image to Base64 converter: frequently asked questions

Something else? Ask the team

When should I use Base64 images?

Use Base64 for: HTML email images (prevents external image blocking), small inline icons (< 5KB), self-contained HTML files, and API payloads requiring image data. Avoid for large images — Base64 increases file size by ~33%.

Does Base64 encoding affect image quality?

No. Base64 is a lossless encoding format. The image data is encoded mathematically and decoded back to exactly the same pixel data. No quality is lost during encoding or decoding.

Why does Base64 make files larger?

Base64 represents every 3 bytes of binary data as 4 ASCII characters — a 33% size increase. Images that are 100KB as files become approximately 133KB as Base64 strings.

What is a data URI?

A data URI is a complete URI that contains the actual file data inline, using the format: data:[mediatype][;base64],[data]. It allows external resources to be embedded directly in HTML or CSS without separate file requests.

Is there a maximum image size for Base64?

The tool supports images up to 5MB. However, Base64 encoding large images is generally not recommended — images over 10KB are better served as external files cached by the browser.

Each one opens on its own page and works straight away, with no sign-up.

Explorar más herramientas gratuitas:Generador de SchemaGenerador de etiquetas MetaGenerador de LLMs.txtBrowse all free tools

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  • Scores SEO, answer-engine (AEO) and generative-engine (GEO) readiness
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fieldnote.app4,571 credits

Site audit

fieldnote.app · SEO, AEO and GEO

Illustrative data
SEO
82
+6
AEO
64
+11
GEO
58
+9
Pages
48
Fixesby impact
  • /pricing · Missing H1High
  • /blog/guide · No FAQ schemaMedium
  • /llms.txt · Not foundMedium
  • /about · Meta description too longLow

See where your whole site stands

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