Image Size Estimator
Estimate image file size based on dimensions, format, and quality.
The Image Size Estimator calculates the approximate file size of an image based on its pixel dimensions, file format, and compression quality. This helps you plan for storage, bandwidth, and page load optimization.
Different image formats have very different compression characteristics. JPEG uses lossy compression ideal for photos. PNG uses lossless compression better for graphics and screenshots. WebP offers superior compression over both. GIF is limited to 256 colors.
The estimator provides approximate file sizes and uncompressed bitmap size, helping you choose the best format and quality setting for your use case.
Everything runs in your browser. Your data is never sent to any server.
Different image formats have very different compression characteristics. JPEG uses lossy compression ideal for photos. PNG uses lossless compression better for graphics and screenshots. WebP offers superior compression over both. GIF is limited to 256 colors.
The estimator provides approximate file sizes and uncompressed bitmap size, helping you choose the best format and quality setting for your use case.
Everything runs in your browser. Your data is never sent to any server.
Estimator
Results
How to Use
- Enter image width and height in pixels
- Select the image format
- Adjust quality percentage
- Click Calculate to estimate file size
FAQ
How accurate are these estimates?
Estimates are approximate. Actual file size depends on image content complexity. Photos with many details compress less than simple graphics.
Is my data uploaded?
No. Everything runs in your browser. Your images and data never leave your device.
Is my data safe when I use Image Size Estimator?
Yes. All calculations run entirely in your browser. Your data is never sent to a server, stored in a database, or shared with anyone. You can use this tool with complete confidence that your information remains private.
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