Image to Base64
Get a data URL string you can paste straight into code.
Image to Base64 converts an uploaded image into a base64-encoded data URL string that you can paste directly into HTML, CSS, or other code — no separate image file needed for small embedded graphics.
Click to choose an image, or drag one in here
One image at a time
How to use
- Upload one image.
- The base64 string appears below automatically.
- Click "Copy to clipboard", or download it as a text file.
Common use scenarios
- Embedding a small icon or logo directly into a CSS background-image property.
- Inlining a tiny image into an HTML email so it doesn't rely on an external image host.
- Embedding a placeholder or favicon image directly into application code.
- Sharing an image as plain text when a file upload isn't convenient.
✓Content & verification reviewed: 2026-08-25
How we verify Image to Base64
How to confirm the base64 string is complete and usable in your code.
Base64 text is larger than the original file
Base64-encoded data is roughly a third larger than the original binary file — fine for small icons and graphics, but noticeably bloats your code or page size if used for large photos.
Copy vs. download
You can copy the string straight to your clipboard to paste into code, or download it as a .txt file if you need to store or share it separately — both give you the exact same string.
The output includes the full data URL prefix
The generated string starts with a prefix like "data:image/png;base64," — make sure you paste the entire string, including this prefix, or the browser won't recognize it as valid image data.
Before you rely on the result
- You understand base64 text will be about a third larger than the original image file.
- You're using this for a small icon/graphic, not a large photo, if page weight matters.
- You copied or downloaded the complete string, including the "data:image/...;base64," prefix.
- You've tested the pasted string actually renders the image correctly in your target context.
Who this is for
- Web developers who want to inline a small image directly into CSS or HTML.
- Anyone building an HTML email that needs an image without relying on an external host.
- Developers embedding a placeholder graphic or icon directly into application code.
- Anyone who needs to share an image as plain text rather than a file attachment.
Real-world examples
Inlining an icon in CSS
A developer embeds a small icon directly as a base64 background-image in their CSS, avoiding an extra HTTP request for a tiny graphic.
Self-contained HTML email image
Someone builds an HTML email with a small logo inlined as base64, so the image always displays even if the recipient's email client blocks external images.
Sharing an image through a text-only channel
A developer needs to share a small screenshot through a chat or system that only accepts plain text, so they convert it to a base64 string and paste that instead.
Limitations
- Base64 text is about a third larger than the original file — fine for small icons, not ideal for large photos.
Frequently asked questions
Why is the base64 string so much longer than I expected?
Base64 encoding represents binary data as text, which is inherently about a third larger than the original file — this is normal and expected, not a sign of anything going wrong.
Do I need to include the "data:image/...;base64," part?
Yes — that prefix tells the browser or application what kind of data follows and how to decode it; without it, the string won't be recognized as valid image data.
Is base64 a good choice for large photos?
Generally no — the size overhead and lack of separate caching make it a better fit for small icons and graphics rather than large photographic images.
Does converting to base64 change the image quality?
No — base64 just encodes the exact same image bytes as text; there's no re-compression or quality loss involved.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-25
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