How to compress images
Large photos slow down websites and bounce email inboxes. This compressor re-encodes your image in the browser so you can see how much space you save before downloading. No account, no server upload.
- Upload an image — drag a JPG, PNG, or WebP file onto the drop zone or click to choose one.
- Adjust compression quality — move the slider left for smaller files, right for sharper detail.
- Review the size comparison — the workspace shows original versus compressed file size when available.
- Compress & download — save the optimized file to your device.
Lossy vs lossless compression
Image compression either removes imperceptible data (lossy) or reorganizes pixels without discarding information (lossless).
| Type | How it works | Typical formats | Best use |
|---|---|---|---|
| Lossy | Discards fine detail humans rarely notice | JPG, WebP (lossy mode) | Photos, hero banners, blog featured images |
| Lossless | Smaller files without changing visible pixels | PNG, WebP (lossless) | Logos, diagrams, UI assets with text |
When your source is PNG, this tool keeps PNG lossless unless you convert to a lossy format elsewhere. JPG and WebP compression respond directly to the quality slider.
Choosing a quality setting
There is no single “correct” value — it depends on content and destination:
- 80% — a solid default for blog photos and product shots; often cuts size dramatically with little visible change.
- 60–70% — aggressive savings for thumbnails or background images viewed at small sizes.
- 90%+ — archival or print-adjacent work where artifacts must stay invisible.
Zoom in on edges and text overlays after compressing. Busy foliage hides compression better than flat skies or gradients.
Why compress before publishing
Search engines factor page speed into rankings, and users abandon slow pages. Compressing images is one of the highest-impact, lowest-effort optimizations for WordPress sites, landing pages, and newsletters. A 3 MB camera export can often become a few hundred kilobytes without ruining the hero shot.
What this tool does not replace
Compression reduces file size; it does not change dimensions. Pair this compressor with a resizer when you need both smaller pixels and fewer bytes. For bulk CDN pipelines or automatic responsive images, use your host or build tooling — this page is ideal for one-off fixes and quick checks.