Compress any image to an exact file size. Resize your image size from MB to kB.
Your files never leave your device. All compression happens locally in your browser.
MB2kB is a free online image compressor that lets you reduce image file size to any specific target you need. Whether you want to compress an image to 50 kB, 100 kB, 200 kB, or any other size, MB2kB makes it simple. Just upload your image, enter your desired file size, and the tool handles the rest.
If you have ever tried uploading a photo to a government website, job portal, or college admission form, you know how frustrating size limits can be. These portals are very strict about file sizes, and they will reject your upload if the image is even slightly over the limit. That is exactly the problem MB2kB solves.
What makes MB2kB different from most other image compressors is that everything happens locally in your browser. Your images are never uploaded to any server. The compression runs entirely on your device, which means your photos stay private and the process works even on slower internet connections.
So whether you need to compress an image from MB to kB for an online form or just want to reduce image size for email, MB2kB is the quickest way to get the job done.
There are plenty of image compressors out there, but here is what makes MB2kB stand out from the rest.
Your images never leave your device. All compression happens right inside your browser for complete privacy.
Set a precise target in kB or MB. Need exactly 100 kB for a form? MB2kB hits it every time.
No accounts, no sign-ups, no email verification. Just open, drop, compress, and download.
Works with all major image formats. The compressor handles format detection automatically.
No usage limits, no watermarks, no hidden charges. Compress as many images as you need.
Runs in any browser on phones, tablets, laptops, and desktops across all operating systems.
Compressing images with MB2kB is quick and straightforward. Here is a step by step walkthrough.
Drag and drop your image into the upload area, or click to browse and select a file from your device. MB2kB supports JPG, JPEG, PNG, and WebP formats, so most images will work right away.
Enter the file size you need in the input box. You can choose between kB and MB using the dropdown. For example, if a form requires a photo under 100 kB, just type 100 and select kB.
Click the Compress button and MB2kB will start reducing your image to the target size. The entire process happens locally in your browser, so it is fast and your image stays on your device.
Once the compression is done, you will see a before and after comparison along with the new file size. Click the Download button to save the compressed image to your device.
If you need to compress images on a regular basis, check out our Image Compressor mobile app. It is available for both Android and iOS, and it also supports compressing multiple images at once.
People use MB2kB for all kinds of situations. Here are some of the most common ones.
SSC, UPSC, and banking portals require photos between 50 kB and 100 kB.
Profile photos and resume images for Naukri, LinkedIn, and career pages.
Photos and scanned documents for university admission portals.
Reduce photo sizes so your emails send without bouncing back.
Faster page loads, better SEO rankings, and improved user experience.
Keep photos looking sharp while staying within platform guidelines.
Image compression works by reducing the amount of data stored in a file. With lossy compression (which is what MB2kB uses for JPEG images), the tool removes small details that the human eye is unlikely to notice. The result is a much smaller file that still looks great to most people. The level of compression depends on how small you need the file to be.
File size matters because many websites and online forms set strict upload limits. If your image is 2 MB but the form only accepts files under 100 kB, you need a way to bridge that gap. That is where an image compressor like MB2kB comes in. It lets you target the exact size you need instead of guessing and re-compressing over and over.
Want to learn more about how this works? Check out our articles on how image compression works and the differences between JPEG, PNG, and WebP formats.
Learn more about image compression, file formats, and optimization tips.
A look at JPEG, PNG, WebP, and AVIF to help you pick the right format for your needs.
Read MoreA detailed reference for photo and signature size limits across major Indian government portals.
Read MoreMB2kB is a free online image compressor that lets you reduce image file size to a specific target in kB or MB. It is designed for anyone who needs to compress images for government forms, job applications, college admissions, email attachments, or website optimization. The tool runs entirely in your browser, so your images never get uploaded to any server.
Yes, MB2kB is completely free to use with no limits on how many images you can compress. There are no hidden charges, no watermarks on your images, and no premium plans. You can compress as many images as you need, whenever you need to.
No, MB2kB is a web-based image compressor that works right inside your browser. You do not need to download or install anything to use it. Just open mb2kb.com on any device with a browser and start compressing. If you prefer a dedicated app, we also have mobile apps available for Android and iOS.
Upload the image you want to compress by dragging it into the upload area or browsing your files. Then enter your desired file size in kB or MB and click the Compress button. The tool will process your image locally and show you a before and after comparison. Once you are happy with the result, click Download to save the compressed image.
MB2kB supports JPEG, PNG, and WebP image formats. These are the most commonly used formats for photos, screenshots, and web images. Simply upload your image in any of these formats and the compressor will handle it automatically.
Absolutely. MB2kB does not upload any images to a server. The entire compression process happens locally inside your web browser, which means your images never leave your device. This makes it one of the safest image compressors available online, especially if you are working with personal documents or ID photos.
No, we do not store any of your images. Since all processing happens locally in your browser, your image data never reaches our servers. Once you close or refresh the page, the image data is gone. There is no cloud storage or server-side processing involved at all.
Since MB2kB processes images locally in your browser, the limit depends on your device’s memory and processing power. In practice, it works well with images up to about 10 to 15 MB. For very large files beyond that, the compression may take a bit longer or may not work smoothly on older devices.
The MB2kB website is designed for compressing one image at a time with precise size targeting. If you need to compress multiple images in bulk, check out our dedicated Bulk Image Compressor web app. Our mobile apps for Android and iOS also support batch compression, which is great if you work with images regularly.
Some reduction in quality is a natural part of lossy compression, which is how file size gets reduced. However, MB2kB is designed to find the best possible quality at your target file size. For moderate compression (like going from 2 MB down to 200 kB), the difference is usually hard to notice. The more aggressively you compress, the more visible the quality loss becomes.
It varies by portal, but most Indian government websites require passport photos between 20 kB and 200 kB. For example, SSC and UPSC forms typically ask for photos under 100 kB and signatures under 50 kB. Banking recruitment portals often have similar limits. Always check the specific requirements on the form before compressing, then use MB2kB to match the exact size needed.
Most image compressors upload your files to a remote server for processing, but MB2kB does everything locally in your browser. Your images never leave your device, so there is no privacy risk. On top of that, MB2kB lets you target an exact file size in kB or MB, which is something many other tools do not offer. And it is completely free with no registration, no watermarks, and no limits.