Image Compressor: A Practical Guide
Use Image Compressor to compare smaller encodings of your images and download the result. The current image suite offers format and quality controls. A smaller file can improve upload convenience, but the best result is one that still preserves the details you need.
How to Use Image Compressor
- Select the images.
- Choose Automatic or an explicit output format.
- Adjust Quality and run Compress images.
- Compare file size and inspect the output before downloading.
Compression May Change Format
Automatic mode can choose WebP, so the output extension may differ from the source. For an already smaller source, the compression workflow can retain the original rather than forcing a larger re-encoding.
JPEG and lossy WebP quality affect detail and file size. Forced PNG is lossless, so the quality slider does not work like a JPEG-quality control. No fixed percentage reduction is guaranteed.
Worked Example
For a large website photograph, compare a moderate-quality result with the source at the intended display size. Check faces, fine text and smooth gradients.
A tiny optimized icon may not shrink at all. That is not automatically a processing failure.
Reduce unnecessary pixel dimensions: use the Image Resizer.
Choose WebP explicitly: use the Image to WebP.
Checks and Common Mistakes
- Check output format compatibility.
- Do not assume every image gets smaller.
- Avoid repeatedly recompressing the only copy.
- Inspect text and logos at full size.
Frequently Asked Questions
Does compression resize the image?
This workflow primarily changes encoding. Use Image Resizer when you need fewer pixels.
Why is PNG unchanged?
PNG is lossless and the quality slider does not provide the same control as for JPEG.
Can I process several images?
The image suite supports multiple selections and offers individual or combined downloads where shown.
Related Tools for the Next Step
- Image Resizer: Reduce unnecessary pixel dimensions.
- Image to WebP: Choose WebP explicitly.
- Image Quality Reducer: Control a deliberate lossy re-encoding.
- Image Dimensions Checker: Inspect dimensions and file size.
Reference
Further reading: MDN image file types and formats.