Image compression vs image resizing
Resizing changes pixel count. Compression changes how those pixels are stored. You usually need both for a web hero, in that order: resize, then compress.
Do not compress a 4000-pixel photo and then display it at 800 pixels. Resize to the display size first, then compress. ConvertPass keeps those jobs in separate tools so the controls stay honest.
| Topic | Compression | Resizing |
|---|---|---|
| What changes | Bits per pixel, artefacts, format. | Width and height. |
| When it helps | After you already have the right pixel size. | When the source is larger than the layout. |
| When it hurts | Re-encoding an already small JPEG at ‘quality 100’. | Upscaling a tiny asset and expecting sharpness. |
| Metadata | Canvas compression strips it. | Canvas resize strips it too. |
Related tools
- Image compressor
Reduce image weight in the browser and see the new file size before you download.
- Image resizer
Resize images on-device without a trip through a remote farm.
- Image converter
Convert images on-device, with honest limits for animation and AVIF support.
Related formats
Last reviewed 16 August 2026.