Reduce image size to under 1 MB
Phone photos are often 3–10 MB – too big for many upload forms. Bring them under 1 MB at up to 4K resolution, so they still look great when someone zooms in.
- No upload
- Free, no sign-up
- Whole folders
- Works offline
Drop images or a folder here
JPG, PNG, WebP, AVIF or BMP · no file limit
Processed on your device. Nothing is uploaded.
How to compress an image to 1 MB
- 1
Add your photos
Drop large photos or a folder from your phone or camera. HEIC isn’t supported yet – export as JPG first.
- 2
The 1 MB target is ready
Images keep up to 3840 px (4K) and are saved as JPEG at the best quality that stays below 1 MB (1024 KB).
- 3
Review the savings
The list shows the new size of every file; use the slider to compare any photo with its original.
- 4
Download or save to a folder
Download a ZIP, or in Chrome and Edge save the results straight into a folder on your computer.
Where 1 MB limits appear
Plenty of systems cap images at 1 MB: job and school applications, help-desk tickets, forums, website builders, CMS media libraries and many internal tools. A 1 MB limit is generous enough that a photo can stay detailed, but a modern phone photo almost always exceeds it.
With 1 MB = 1024 KB, the target here is 1024 KB, the way upload forms usually count. If a form says “1 MB” and means one million bytes, set the target to 976 KB to be safe.
Keeping 4K detail at 1 MB
A 4K image (3840 px wide) has about eight megapixels. At high JPEG quality that usually fits into 1 MB for typical photos, which means you lose almost nothing visible compared with the original. Very detailed scenes such as foliage or crowds may land at a slightly lower quality, still far above what is noticeable on a screen.
If you only need the photo for a screen, reduce the maximum width to 2560 px – the quality goes up and the file gets even smaller.
Whole photo libraries in one go
Choose “Select folder” to compress an entire trip or event. Subfolders are included, every photo is processed in parallel by your own device, and the ZIP rebuilds the same folder structure. Nothing is uploaded, so even thousands of photos stay private.
Frequently asked questions
How do I make a 5 MB picture 1 MB?
Add it here. The photo is compressed to the highest JPEG quality that fits under 1 MB, and scaled to 4K only if it is larger than that.
Is 1 MB 1000 KB or 1024 KB?
Upload forms usually mean 1024 KB, which is what this page uses. If a form counts one million bytes, set the target to 976 KB.
Can I compress iPhone HEIC photos?
HEIC isn’t supported yet. On iPhone, set Camera → Formats to “Most Compatible”, or export the photos as JPG, then compress them here.
Will I see a difference from the original?
For typical photos, no. The comparison slider lets you check any image at full size before you download it.
Related tools
Compress to 500 KB
A 500 KB budget leaves room for high-resolution, detailed photos. Asset Compressor keeps up to 2560 px and fits every image in your batch under half a megabyte.
Compress JPEG
Shrink JPG photos with the MozJPEG encoder while keeping them sharp. Drop a single photo or an entire folder – nothing is uploaded.
Resize images
Set a maximum width or height and every image is scaled down proportionally – and compressed at the same time.
JPG to WebP
Convert JPEG photos to WebP for smaller, faster-loading images at the same visual quality – in bulk and without uploading.
Related guide
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