Ready-to-Paste Data URLs
The output includes the image MIME type and Base64 prefix, so it can be pasted into supported HTML, CSS, JSON, or API fields without rebuilding the data URL.
Image to Base64 Converter
Encode an image as a Base64 data URL without uploading it. Copy the result for HTML, CSS, JSON, or API payloads, or save it as a text file.
Private Base64 Image Encoding
Create a complete image data URL while keeping the source file on your device.
Original Bytes Preserved
Base64 changes how the file bytes are represented as text; it does not resize, recompress, or visually alter the source image.
Common Image Formats
Encode PNG, JPG, WebP, GIF, SVG, and AVIF images up to 10 MB. The tool reports the original byte size and resulting text length.
Local Browser Processing
The browser reads and encodes the selected file locally. The image and generated Base64 text are not sent to an Instasize processing server.
Need to Turn Base64 Back Into an Image?
Decode and Preview the Result
Paste a Base64 data URL or raw Base64 string into the reverse converter to preview the decoded image and download it in the detected format.
How to convert an image to Base64?
- 1
Step 1: Choose an image
Select one PNG, JPG, WebP, GIF, SVG, or AVIF image up to 10 MB, or drag it into the upload area.
- 2
Step 2: Encode it locally
The browser reads the original bytes and creates a Base64 data URL without sending the file to a processing server.
- 3
Step 3: Copy or download the text
Copy the complete data URL to the clipboard or download it as a .txt file for use in code or another supported field.
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@cle957What is an image Base64 string?
Base64 represents binary image bytes with text characters. A data URL adds the image MIME type and a Base64 marker before that text so browsers and supported applications know how to interpret it.
Does converting an image to Base64 reduce its size?
No. Base64 text is usually about one-third larger than the original binary file before compression. It can simplify embedding a small image, but it is not an image-compression method.
Does Base64 encoding change image quality?
No. Encoding preserves the original file bytes and does not resize or recompress the image. Decoding the output produces the same bytes that were encoded.
Which image formats can I encode?
The browser tool accepts PNG, JPG, WebP, GIF, SVG, and AVIF images up to 10 MB. It preserves the source MIME type in the generated data URL.
Is my image uploaded to a server?
No. The file is read and encoded locally in your browser. Do not paste the result into a public service unless you intend the image data to be public there.
When should I use an image data URL?
Data URLs can be useful for small self-contained assets, prototypes, API payloads, or fields that explicitly request Base64. Large embedded strings can increase HTML, CSS, or JSON size, so normal image files are often better for larger assets.
Instasize pricing: free editing and paid AI plans
Resize, crop, add text and work with layers for free. Paid plans include an AI usage allowance, background removal and access to image and video models. First-time subscribers can start with a free trial.
Free
Essential tools for casual creators.
$0
Free forever
- Resize, crop, text and layers
- Batch resize & convert, 200 photos at a time
- HD export
- No AI features: AI edits are part of Pro
Pro
PopularEssential AI tools for creators
$39.99/mo
Billed monthly
Annual option: $299.99 billed yearly.
- More AI usage
- Batch background removal, 200 photos at a time
- 2 generations at a time
- AI Chat Editing
- All AI image models
- All AI video models
Ultimate
Advanced features for professionals
$59/mo
Billed monthly
Annual option: $499 billed yearly.
- More AI usage
- Batch background removal, 200 photos at a time
- 4 generations at a time
- AI Chat Editing
- All AI image models
- All AI video models
Max
Maximum power and speed
$259/mo
Billed monthly
Annual option: $2199 billed yearly.
- More AI usage
- Batch background removal, 200 photos at a time
- 8 generations at a time
- AI Chat Editing
- All AI image models
- All AI video models
AI Image Generator for Every Creative Need
Generate from text, expand photos, remove backgrounds, and upscale to 4K
