JPG · mozjpeg · Offline

Compress JPG
without losing
what matters

Shrink JPG photos and exports locally. mozjpeg at quality 40–95, balanced / fast / maximum — batch a whole folder without uploading a single file.

JPG / JPEG · mozjpeg · Windows 10/11 · Offline
3.4 MB example JPG−27% savedQuality 85 balanced
Why JPG

Photos are heavy at quality 95.
85 looks the same.

Most JPGs ship at quality 90–95 with oversized dimensions and metadata. Compressy trims all three.

mozjpeg tuned

Balanced by default. Fast trades a point for speed, maximum squeezes the last percent.

Resize while you’re at it

Max W×H, downscale only, keep aspect — off by default, on when you need it.

Private by default

No cloud, no queue. Your JPGs never leave your disk.

Before → After

Measured on JPGs

Same 12-image portfolio, JPGs only, Quality 85 balanced.

FileBeforeAfterSaved
hero-portfolio.jpg3.4 MB2.5 MB−27%
case-study-cover.jpg2.8 MB2.2 MB−22%
team-photo-2024.jpg5.1 MB3.6 MB−29%
Quality 85 85 Slide to 80 for ~30%, 90 for ~15% — preview per file.
How it works

Three steps for JPG

01 01
Select JPGs

Choose a folder or pick JPGs. Filter by type, sort by size.

02 02
Set quality

Quality 40–95, engine balanced/fast/maximum, keep format or convert to WebP.

03 03
Batch

Compress locally, backups to /backup, export CSV.

Related

Next for JPG

Compress to 100KB

Hit a target size. 100KB →

FAQ

JPG — FAQ

+Is JPEG the same as JPG?

Yes. JPG and JPEG are the same format — different extension, same mozjpeg engine. This page and /compress-jpeg do the same thing.

+What quality should I use for JPG?

85 is the default — sharp for photos while saving ~27%. Use 80 for more savings, 90 for fidelity.

+Can I convert JPG to WebP at the same time?

Yes. Set output to WebP and compress the whole batch in one pass. See JPG to WebP.

+Do I need to upload?

No. All JPG processing is local. No upload, no account.

JPG · mozjpeg

Shrink JPGs where they live — on your PC.

Install once, compress any JPG folder offline.

Offline · No upload · Windows