Base64 Image
Convert images to/from Base64 strings
What is Base64 Image?
Base64 Image converts images to and from Base64-encoded strings. Base64 encoding allows binary image data to be represented as text, enabling inline embedding in HTML, CSS, or JSON without separate file references.
When to use this tool
- Embedding small images directly in HTML or CSS to reduce HTTP requests
- Storing image data in JSON or database text fields
- Transmitting images through text-only channels (email, API payloads)
- Converting between image file and data URI formats
How it works
To encode: reads the image file as a binary blob, converts each byte to its Base64 representation using btoa or FileReader. To decode: strips the data URI prefix, decodes the Base64 string back to binary, and reconstructs the image file.
Security Guidelines
- Base64 is encoding, not encryption — it provides no security or confidentiality
- Base64 encoded images are ~33% larger than the original binary — use only for small images
- For HTML embedding, use data URIs with appropriate content-type prefixes
Examples
About Base64 Image
Convert images to/from Base64 strings It runs entirely in your browser — no files are uploaded to any server, ensuring complete privacy and instant results.
- •Compress images to WebP or AVIF
- •Convert between PNG, JPG, and WebP
- •Encode images to Base64 strings
- •Process entirely in your browser
Last updated: 2025-01-15
FAQ
Convert images to/from Base64 strings
Yes, completely free. No signup required.
Yes. Runs entirely in your browser, no files uploaded.
Yes, works on any device with a modern browser.
No, everything runs in your browser.