MrTools guides
How to reduce an image’s file size
Choose between resizing and compression by identifying whether pixels or encoding cause the file size.
Resize before compressing
If an image is larger than its final display, reduce its pixel dimensions first. A 4000-pixel photo shown at 1200 pixels carries unnecessary data. Keep the aspect ratio unless an exact crop is required.
Compare compression results
Lower JPG or WebP quality often saves space at the cost of detail. PNG is lossless and browser re-encoding may not shrink an already optimized file. Compare the output instead of trusting one universal setting.
Keep the source
Download a new copy and preserve the original when metadata, exact pixels or future edits matter. MrTools processes supported images locally; animated images and guaranteed EXIF or ICC preservation are outside this MVP.
02 · Answers
Frequently asked questions
Should I resize or compress first?+
Resize first when the dimensions exceed the final use, then compress the resized copy.
Why did my PNG become larger?+
PNG has no browser quality slider and may already be optimized; re-encoding can add bytes.