How to Compress Images for the Web Without Making Them Look Bad

Image compression advice often collapses into “set quality to 80.” That is a useful starting point, not a workflow. A sharp 400 KB product photo is better than a smeared 120 KB one, and a 4 MB photo displayed in a 600-pixel card is wasteful at any quality.

Resize before lowering quality

Start with the largest size the image will actually be shown. For a 1200-pixel content column, a 2400-pixel source covers high-density screens; the original 6000-pixel camera frame does not add visible detail there. Use the batch image resizer to cap the longest edge without enlarging smaller files.

Choose a format that matches the image

• WebP is a strong general-purpose choice for photos and mixed website graphics.
• JPEG is dependable for photos when old software compatibility matters.
• PNG is for transparency and graphics that genuinely need lossless pixels, not ordinary photographs.

The deeper comparison is in PNG vs WebP vs JPEG. Do not convert a tiny, already optimized JPEG to PNG and expect it to shrink; PNG often makes photographic data much larger.

Find quality from the difficult image

Open the bulk image compressor, begin around 82, and inspect the image with fine hair, foliage, text or hard contrast — not the easiest image in the folder. If edges ring or gradients become blocky, move upward. Once that image survives, the same setting is usually safe for the batch.

Measure the final result

Look at both the percentage saved and the actual output. A “12% smaller” result may not justify another lossy generation. A 75% saving after sensible downscaling usually does. Keep your originals; compressed delivery files should be reproducible outputs, never your only copy.