How to Compress an Image Without Losing Too Much Quality
Reduce an image to the dimensions its destination needs, then compare JPEG or WebP exports at several quality settings. Inspect the result at its intended display size and keep the smallest version whose detail is acceptable for that use. There is no quality setting that guarantees the same savings for every picture.
Separate dimensions from compression quality
Dimensions describe the pixel grid; file size describes encoded bytes. A photograph displayed at 1200 by 800 pixels may not need a 2400 by 1600 export, although high-density displays can justify extra pixels. Halving both dimensions quarters the pixel count, not necessarily the final byte size.
JPEG and lossy WebP trade some detail for smaller representations. PNG export is lossless for the pixels being encoded and does not respond to a lossy quality control in the same way. Resizing before PNG export still changes the image; lossless encoding does not undo that change.
Run a small comparison
Start from the original for every trial. For a 2400 by 1600 photo intended for a 1200 by 800 placement, first make one correctly sized version. Export that at a higher and a lower quality, then compare small text, faces, fine lines and smooth gradients. Record actual output bytes rather than assuming one format always wins.
Source: 2400 × 1600
Trial dimensions: 1200 × 800
Trial A: JPEG, higher quality
Trial B: JPEG, lower quality
Trial C: WebP, comparable visual quality
Record: output bytes and visible defectsA repeatable compression workflow
1. Keep the original and confirm the destination's accepted formats and pixel requirements.
2. Resize only if needed, preserving proportions. Avoid enlarging an already small image to chase a file-size target.
3. Choose JPEG for an opaque photo or test WebP when the destination accepts it. Retain transparency when required.
4. Adjust quality and inspect the output at normal size and zoomed detail. Compare actual bytes with the source.
5. Download the chosen version and open that file once more before replacing a production asset.
When the result is larger or the target is missed
An already optimized source can become larger after another encoding pass. Flekify's target-size option searches within a bounded quality range and may fail to reach the target. Reduce dimensions, choose another accepted format, or keep the original when the new result is worse. Avoid repeated lossy exports of previous lossy exports.
Follow along in Flekify
Use Image Compressor to compare input and output sizes and try JPEG or WebP quality settings locally. Use Image Resizer first when the actual issue is excessive pixel dimensions.