Base64
Represents binary data with a 64-character alphabet so it survives text channels.
Base64 Encoder / Decoder
Instantly encode and decode images and text to Base64. Supports both Data URI format and raw Base64 output.
Image to Base64
Binary to Text Serialization
Convert images to Base64 strings to embed them directly in your code.
Data URI
Raw Base64
Base64 turns binary data into text-safe output
Base64 is useful when image or file bytes need to travel through text-only places such as JSON, HTML, CSS, email, or test fixtures. This browser-side tool reads an image and shows both the full Data URI and the raw Base64 body, so you can quickly choose the format your code needs.
Key concepts
Data URI
Combines the MIME type and Base64 body for direct use in HTML or CSS.
Raw Base64
Keeps only the encoded payload for APIs, tests, or storage fields that already know the media type.
How to use
- Select an image file and let the browser read it locally.
- Copy the Data URI for HTML/CSS embedding, or copy raw Base64 when only the payload is needed.
- For large files, remember that Base64 strings are long and usually belong in storage or a CDN instead.
Frequently asked questions
Does Base64 make a file smaller?
No. Base64 is an encoding, not compression, and it usually makes the payload about one third larger.
What is the difference between Data URI and raw Base64?
A Data URI includes a prefix such as `data:image/png;base64,` so the browser knows the media type. Raw Base64 is only the encoded body.
Is my image uploaded to a server?
The conversion on this page uses the browser FileReader API. For sensitive files, still follow your organization’s security policy.
For sensitive or large assets, prefer controlled storage and access rules instead of long Base64 embeds.