Compress JPEG images — free, private, no upload
Re-encoded with MozJPEG in your browser. You see exact before/after sizes on every file.
About compressing JPEG
JPEG has been the default format for photographs since 1992. It uses lossy DCT compression tuned for natural images, which keeps photo files small at the cost of some fine detail. Every browser, OS, camera, and app on earth can open a JPEG, which is why it remains the safest choice for sharing and uploading photos. EditItAll re-encodes JPEGs with MozJPEG, which typically shaves 20–60% off camera or phone originals with no visible quality loss.
How to compress JPEG
- 1Drop JPEG files above — batches are fine, and nothing is uploaded.
- 2Pick a quality (80 is visually lossless for photos). The output format stays the same unless you change it.
- 3Watch each file’s size drop, then download individually or as a ZIP.
JPEG strengths & limitations
Strengths
- Opens literally everywhere — 30+ years of universal support
- Small files for photographs at quality 75–85
- Progressive mode loads gracefully on slow connections
Limitations
- No transparency (alpha channel) support
- Lossy only — repeated edits and re-saves degrade quality
- Visible artifacts on sharp edges, text and flat-color graphics
Frequently asked questions
How does JPEG compression work here?+
Your JPEG is decoded, then re-encoded with MozJPEG — an encoder that squeezes 10–20% more than standard libjpeg at the same visual quality, using trellis quantization and progressive scans. At quality 75–85 most camera and phone JPEGs shrink 40–70% with no visible difference.
What quality setting should I use for JPEG?+
Quality 80 is the sweet spot for photos — visually identical to the original for almost everyone. Use 60–70 for thumbnails and previews, 90+ only when you plan to edit the image again later.
Is there a limit on file size or number of images?+
No hard limits: processing runs on your own device, so the only constraint is your browser’s memory for truly gigantic images. Batch as many files as you want.
Will compressing JPEG remove metadata?+
Yes. Output files are built from raw pixels, so EXIF data — GPS location, camera model, timestamps — is stripped. Orientation is baked into the pixels first so photos stay upright. This usually saves a few extra kilobytes too.
Are my images uploaded anywhere?+
No. The codecs run as WebAssembly in your browser; the page works offline once loaded. Files, previews and results all live in your device’s memory only.