Choose the right format
JPG is a common choice for photographic uploads. WebP can often give smaller files at comparable visual quality where supported. PNG is generally preferable for crisp graphics, transparent pixels and lossless storage, but its files can be larger.
Quality is a tradeoff
Lowering a JPEG or WebP quality slider typically reduces bytes by discarding fine detail. Try 80% as a starting point, then inspect hair, skies, text and gradients for artifacts.
Dimensions often matter more
A 4000-pixel-wide photo used in an 800-pixel slot may be unnecessarily large. Reducing maximum width often saves more than extreme compression. Our compressor can do both locally.
What to expect from results
Already compressed images do not always become smaller. Some format conversions produce bigger files. Our interface shows original and new sizes so you can decide whether to use each export.
JPG does not preserve transparency, so transparent regions are filled white. Repeatedly saving a JPEG can introduce more artifacts. Compression and canvas conversion often remove EXIF/GPS metadata, so preserve the originals when capture date and location matter.
- Export at roughly 80% quality and compare the resulting size to the original.
- Inspect high-contrast edges, text, skies and faces at full size to look for ringing or blockiness.
- If the output is visibly worse, increase quality or keep the original file.
- Try a maximum-width limit only when you no longer need the original pixel dimensions.
A practical quality-control routine
Our compressor can convert up to twelve browser-supported images at a time to JPG or WebP. In the automated test we converted a 960 × 540 synthetic PNG into a 960 × 540 WebP. That verifies encoding and the output dimensions, not that WebP will always be smaller for every source. A photograph usually compresses differently from a flat-color graphic, screenshot or an image that was already optimized.
Test the output rather than trusting the percentage
Related guides
Prepare a photo for a size limit
For a 2 MB limit, export one JPG at 80% and check its actual size. If it is too large, try a smaller maximum width with the same quality and inspect eyes, hair and lettering. Start each attempt from the original to avoid repeated JPEG loss.