Begin with the dimensions actually needed on the page. A 4000-pixel image displayed in a 500-pixel card carries unnecessary data. Resize a copy to a sensible maximum dimension, then choose a format suited to the content.
Resize before adjusting quality
The dimensions of an image often have a larger effect on file size than a small change in quality settings. If an image will appear in a compact card, prepare a suitably sized copy instead of delivering the original camera resolution. Keep the original safely stored and create web-ready versions for specific placements.
Choose compression by visual inspection
Photographs, screenshots, logos, and illustrations behave differently under compression. Inspect fine edges, gradients, text, and faces at the actual display size. If you see blocky areas or blurred text, try a different format or a higher quality setting. Do not judge the result only by the percentage of file size saved.
Prevent avoidable page shifts
Use meaningful filenames, suitable alternative text, and explicit image dimensions in the page layout. Consider responsive image variants for different screen sizes. Lazy-load images that are far below the initial viewport, but do not delay a key hero image unnecessarily.
A safe, repeatable tool workflow
- Confirm the expected input and output formats before processing files.
- Keep an untouched original until the result has been opened and checked.
- Test a representative sample, including a larger or unusual file if relevant.
- Check output quality, file size, page order, calculations, and formatting.
- Review privacy information before processing confidential or customer data.
Troubleshooting checklist
If a task fails, verify the file, format, size limits, and browser support. Try a small non-sensitive sample and record the exact error if the issue persists.