Compress JPEG Images Online — Free & Local
JPEG photos arrive bloated more often than you would think: camera originals straight off an SD card, scanner exports, or images saved by editing apps at maximum quality all routinely carry 2–10× more weight than the same picture needs. Every extra megabyte costs upload time, storage quotas and page speed. This compressor fixes that in seconds with a quality slider and a live preview of exactly what you will get.
Compression is re-encoding, not cheating: your image keeps its exact pixel dimensions — no resizing, no cropping — while redundant visual information is discarded in ways the eye barely registers. The art is choosing where to stop. Around 85% quality most photos are indistinguishable from the original; drop to 70% and file sizes fall dramatically with only mild softening on close inspection; below that, blockiness starts creeping into flat areas like skies. The real-time size estimate lets you walk down the slider until quality and weight feel right for your purpose.
Everything runs locally through your browser's canvas engine. Photos are never uploaded — important for client work, unreleased products or simply family pictures you would rather keep to yourself.
How to Use This Tool
- Add your JPEG — drag it in, browse for it, or paste from clipboard.
- Drag the quality slider — watch the estimated compressed size update live.
- Download — save the smaller JPEG at unchanged dimensions.
Benefits
- Typical savings of 50–80% — without visible quality loss.
- Live before/after sizes — including a savings percentage.
- Dimensions untouched — never resized or cropped.
- Private by design — local processing only.
- Free forever — unlimited use, no signup.