Image to Base64
Convert images into Base64 text instantly. You can generate either raw Base64 or a full Data URL, preview the uploaded image, copy the result, and download it as a text file.
Enable the prefix when you want a self-contained string such as data:image/png;base64,.... Disable it when you need only the raw Base64 portion.
Privacy: conversion runs locally in your browser. No image data is uploaded, stored, or transmitted.
Learn more about images
Understanding formats and optimization helps you get better results when converting or editing images.
How it works
This tool reads the uploaded image locally with the browser FileReader API and converts it into a Base64 string. You can output the full Data URL or strip the prefix to keep only the raw Base64 data.
- Raw Base64: useful when another system expects only the encoded content
- Data URL: useful when you want to paste the result directly into HTML or CSS
- Result interpretation: longer output means more text to store or transmit, and Base64 is usually larger than the original binary file
- Best use case: small images, prototypes, inline assets, test payloads, and quick conversions
Examples
- HTML embedding: generate a Data URL and place it in an
img srcattribute - CSS usage: use a Data URL inside
background-image: url(...)for a very small asset - API testing: send raw Base64 in a JSON request when testing upload endpoints
- Documentation: keep an example image inline inside sample payloads or technical notes
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you process and convert images directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when optimizing images for web use or changing formats. The results should be interpreted as a modified image with updated format, size, or quality.
FAQ
- What is Base64?
Base64 is a text-based encoding format that converts binary file data into plain text characters. It is often used when binary files must be embedded inside text-based formats.
- What is the difference between raw Base64 and a Data URL?
Raw Base64 contains only the encoded data. A Data URL adds a prefix such as data:image/png;base64, which makes it directly usable in HTML, CSS, and some APIs.
- Is my image uploaded?
No. Everything runs locally in your browser and the image is not uploaded or stored by this tool.
- Why would I use Base64?
Base64 is useful for embedding small images into HTML, CSS, JSON payloads, emails, test data, or prototypes where a text representation is more convenient than a separate file.
- Does Base64 make files smaller?
No. Base64 usually makes data larger than the original binary file because it adds encoding overhead.
- When should I include the Data URL prefix?
Include it when you want to paste the output directly into an img src, CSS url(), or another place that expects a self-contained image string.