Get an image under 100 KB while keeping it sharp.
Quick answer
Set the target to 100 KB. The tool keeps your photo as it is if it already fits. Otherwise it tries smaller sizes, from 85% down to 10% of the original width and height, and at the first size that fits it raises the JPG quality again so the file lands just under 100 KB.
| Share of original size | Pixels | Bits per pixel at the limit |
|---|---|---|
| 100% | 3000 × 4000 | 0.07 |
| 85% | 2550 × 3400 | 0.09 |
| 70% | 2100 × 2800 | 0.14 |
| 55% | 1650 × 2200 | 0.23 |
| 45% | 1350 × 1800 | 0.34 |
| 35% | 1050 × 1400 | 0.56 |
| 28% | 840 × 1120 | 0.87 |
| 20% | 600 × 800 | 1.71 |
| 15% | 450 × 600 | 3.03 |
| 10% | 300 × 400 | 6.83 |
These figures are computed with the same formulas as the Compress Image to 100KB above. Change the inputs in the tool to see your own result.
Compress Image to 100KB shrinks a photo, scan or screenshot to under 100 kilobytes and saves it as a JPG. It is the practical size for many upload forms, email signatures, product listings and website thumbnails. The tool keeps the picture as large and as sharp as the limit allows: it lowers JPG quality in small steps first, and reduces the dimensions only when it has to. It works in your browser without uploading anything.
Made for everyone. Typical uses:
A 4 MB phone photo commonly becomes about 800 by 1,060 pixels near 90 to 100 KB, which looks good on a screen. A 600 KB screenshot of text may need only a quality reduction and stay at its full pixel size.
JPG is photo-oriented; screenshots with sharp text and thin lines can show small artifacts around the letters at low quality, and the PNG converter or the standard Image Compressor may suit them better. Transparent areas become white. Pictures already under 100 KB are left unchanged.
Accuracy: Images are processed with the browser's own image engine and tested with real photos and graphics. Check the result before you use it.
Expert Tip
For a photo that will only be shown on a screen, 100 KB at around 1,000 pixels wide is plenty. If you need a bigger picture at the same weight, try the WebP option in the Image Compressor, which is typically smaller at the same look, provided the destination accepts WebP.
One hundred kilobytes is the size at which an image is small enough for most upload forms and email signatures, and large enough to remain clear. A photo of around 800 pixels across can look good at that weight, and a simple scan of a document can remain readable. It is also a sensible size for website thumbnails and product pictures that must load quickly on mobile.
Use Compress Image to 100KB when the limit is exactly that, or when you want a predictable small file without choosing quality settings yourself.
Instead of asking you to guess a quality number, the tool tests several. It starts from the original size at high quality. If the file is too big, it reduces the dimensions in steps at a moderate quality until the result fits, then raises the quality in small steps to land just under the limit. This is a binary search, so it takes only a handful of tries, even for a large photo.
The advantage is that you do not end up with a file far below your limit. A result of 95 KB for a 100 KB limit means you got nearly all the quality the limit permits.
JPG suits photographs best, and each kind of picture behaves a little differently at 100 KB.
Many forms want a PDF rather than an image. Compress the picture first, then convert it with JPG to PDF. The PDF then wraps the small image, so the document stays small too. If the PDF has its own limit, the Compress PDF to 100KB page can bring the final file under it.
This order is better than creating a large PDF and trying to compress it afterwards, since the image only gets re-encoded once.
Open the result at full size. Look at faces, small text and edges, and compare it with the original side by side. The tool tells you the new dimensions and whether the picture had to be reduced; if you need a particular pixel size for a web layout, set it in the Image Resizer and compress afterwards. Your files stay in your browser throughout.
Three questions come up most often with this size, and the answers are short.
A quality slider is guesswork: you try a value, check the size, and try again. This page does that search for you and also reduces the dimensions when quality alone would look poor, which a slider never does.
A practical process for shrinking website images: right dimensions, right format, sensible quality, lazy loading and a checklist to verify the result.
How to combine JPG and PNG images into a single PDF in order, choose A4 or Letter pages, set margins, and keep the file small with the right quality setting.
How to get a photo or signature under a strict KB limit for an exam or job form: crop, choose dimensions, set JPG quality, and avoid the common rejections.
Explore more in Image Tools, read the guides and articles, or see how we test our tools.
Compress images to reduce file size. Adjustable quality, instant preview and download.
Best for shrinking photos before uploading them to a website or CMS
Get a photo under 50 KB as a JPG for upload forms.
Best for uploading a profile or ID photo to an application portal
Get an image under 200 KB with detail intact.
Best for uploading product photos to an online shop or marketplace
Resize images to any dimensions.
Best for shrinking phone photos for email, forms and websites
Convert JPG and PNG images to PDF.
Best for combining phone photos of paperwork into one document
Convert iPhone HEIC photos to JPG.
Best for sharing iPhone photos with people who use Windows or older Android phones