Compress JPEG images
Your files are converted on your device. They are never uploaded.
or drop them here, or paste with Ctrl+V / ⌘V
.jpg.jpeg.heic.heif.png.webp.avif
- Files stay on your device
- Batch + ZIP
- No sign-up, no limits
This converter runs in your browser and needs JavaScript. Turn it on to convert; the steps below explain everything.
Settings
Smaller JPGs from your photos with a smarter encoder than the one built into your browser.
This page always produces JPG, the format every inbox, form and printer accepts. It uses MozJPEG, an optimised JPEG encoder that makes noticeably smaller files than standard encoders at the same setting. Drop JPGs to slim them down, or drop HEIC, PNG, WEBP or AVIF files and get compressed JPGs back in one step. Camera metadata is handled carefully: the date taken stays, the location goes.
How to use Compress JPG
- Drop your photos. JPG goes in as JPG; HEIC, PNG, WEBP and AVIF are converted to JPG along the way.
- Quality 75 is the default; try 80–85 for photos you care about. Add a max size such as 2000 px for phone photos headed to email.
- Compress and download each JPG, or all of them as a ZIP.
What happens to quality, size and metadata
Every JPG save throws some detail away; the question is if you notice. MozJPEG spends that budget well, so quality 75 from this page is usually indistinguishable from the original on a screen. Where the most bytes hide is resolution: a 4032 × 3024 photo resized to 2000 px is about a quarter of the pixels.
Rotated phone photos are saved upright. The JPG keeps the date taken plus camera make and model so albums sort correctly, and the GPS location is removed by default. Transparent areas in PNG or WEBP sources are filled with your background colour (white by default).
- Test files
- 30
- Average input
- 2.2 MB
- Average output
- 625 KB
- Size change
- 71% smaller
- Time per file
- 788 ms
About JPG
| Full name | JPG |
|---|---|
| Full name | JPEG (Joint Photographic Experts Group) |
| Introduced | 1992 |
| Defined by | JPEG (ITU-T & ISO/IEC) · ITU-T T.81 / ISO/IEC 10918-1 |
| Compression | Lossy |
| Transparency | No |
| Animation | No |
| Largest size | 65,535 × 65,535 px |
| Chrome / Edge | Yes |
| Safari | Yes |
| Firefox | Yes |
| Windows | Yes |
| iPhone / iPad | Yes |
| Android | Yes |
| Typical use | Photos for sharing, email, online forms and printing, where it has to open everywhere. |
JPG JPG is the lossy photo format standardised in 1992 as ITU-T T.81. It throws away detail the eye barely notices, and the quality setting decides how much. It has no transparency and no animation, but every phone, computer, browser, printer and upload form opens it.
Sources for this table
- www.itu.int/rec/T-REC-T.81
- www.w3.org/Graphics/JPEG/itu-t81.pdf
- developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types
- developer.android.com/media/platform/supported-formats
Browser support data: caniuse.com, CC BY 4.0.
Without this site
On a Mac, open the photo in Preview, choose File › Export, keep Format › JPEG and move the Quality slider to the left; the estimated file size updates as you drag. On Windows 11, Paint can save as JPEG but gives no quality control; Photos can resize a copy from its menu. On an iPhone, the Mail app offers smaller sizes when you attach photos. These work for single files; batches are quicker here.
Troubleshooting
- Compressing the same JPG again and again. Each pass adds loss. Always compress from the original.
- Blocky skies at low quality. Smooth gradients suffer first. Stay at 70 or above for photos with lots of sky.
- The file didn’t shrink. It was already compressed hard, so we kept the original.
- PNG logo turned white behind. JPG has no transparency. Change the background colour, or compress as PNG.
Questions and answers
How can I reduce the size of a JPEG file?
Lower the quality a little and reduce the dimensions. On this page, drop the photo, keep quality at 75, set a max size of 2000 px and press Compress. Most phone photos shrink to a small fraction of their size this way with no visible difference on a screen. If you need a precise limit, use a compress-to-size page.
Does compressing a JPG reduce its quality?
Yes, technically, because JPG compression discards detail. At quality 75–85 the loss is usually invisible at normal viewing size. It becomes visible as blockiness and smearing at very low settings or after repeated compression. Keep your originals and compress copies.
What is the difference between JPG and JPEG?
None. JPEG is the name of the format, from the Joint Photographic Experts Group that designed it; .jpg and .jpeg are two spellings of the same file extension. This page accepts both, plus HEIC, PNG, WEBP and AVIF, and always writes .jpg files, which every system recognises.
Will compressing remove the photo’s location?
Yes, by default. GPS coordinates are removed from every JPG this page produces, while the date taken and camera model are kept. If you want the location kept, for example for a mapping app, switch off “Remove location” before compressing.