Image to Base64 Encoding
Encode images into Base64 strings
Features
Supports both files and URLs
Encode both local image files and image URLs on the web
Supports 11 output formats
Output in various formats such as data URLs, img tags, and CSS backgrounds
Toggle data URI format
Switch output between prefixed data URLs and Base64 data only
Copy each format individually
Copy the output format that fits your purpose individually with one click
How to Use
Choose the input method via tabs
Pick an image on the File tab, or enter an image URL on the URL tab
Convert with the run button
Press the run button to encode the image into a Base64 string
Choose an output format to use
Check the data URI format toggle and copy or download the output for your purpose
Use Cases
Speed up embedded images
Embed small images directly into HTML or CSS to reduce the number of loads
Prepare images for email
Embed images directly into HTML email to display them without external references
Set up a favicon
Set a favicon without an external file using the Link tag format output
Pass images via API
Store images in API requests or responses in JSON or XML format
Basic Knowledge
Advantages and Disadvantages of Converting Images to Base64
Base64-encoded images can be embedded directly in HTML or CSS, which reduces requests for retrieving small icons. However, the data size increases to approximately 1.33 times the original, and browser caching becomes less effective, making it unsuitable for large images.
Why Data Size Increases by Approximately 1.33 Times
Base64 works by replacing every 3 bytes of data with 4 alphanumeric characters, so the resulting string is always approximately 1.33 times (or 33% larger than) the original data size.
Safety and Privacy
Server-side processing
Input is processed on the server; only information necessary for the inquiry is sent.
Temporary processing only
For image retrieval, temporary processing occurs on the server, then data is discarded after results are returned.
Communications encrypted with HTTPS
All sent and received data is encrypted by TLS and cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
External requests only to fetch
When a URL is specified, the server fetches only the target URL to retrieve the image
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Updates
- update #409
Fixed text overflow in the image to Base64 encode copy button
- update #374
Image to Base64 Encode: Display dedicated error for images that are too large when specified by URL
Images retrieved via URL are limited to 3MB. If exceeded, instead of showing 'Failed to retrieve image', we notify you that the file size is too large.
Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
Use various tools such as lottery draws and raffles in live streams and videos.
Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.