Resize your image size to 300 kB. Supports JPG, PNG, and WebP image formats.
Your files never leave your device. All compression happens locally in your browser.
Compressing images to 300 kB with MB2kB takes just a few steps. Here is how it works.
Drag and drop your image into the upload area above, or click to browse files from your device. MB2kB supports JPG, PNG, and WebP formats.
The target size is already set to 300 kB for this page. You can adjust it if needed by entering a different number.
Click the Compress button and wait a moment. The tool processes your image right inside your browser, so nothing gets uploaded to any server. Once it is done, compare the before and after results, then click Download to save the compressed image.
300 kB is one of the most versatile file sizes for digital images. It sits in a sweet spot where quality is high enough for professional use but the file is small enough to load quickly and share without friction.
Blog and website images are a primary use case. When you are adding images to blog posts or web pages, 300 kB keeps page load times fast while still looking great on modern screens. Most web performance guidelines suggest keeping images under 400 kB per image, so 300 kB gives you a comfortable margin.
Product photos for e-commerce fit well at this size too. Shoppers need to see enough detail to make a buying decision, and 300 kB delivers that without creating a heavy page that drives them away. Email newsletter images also work well here since many email clients have size limits, and 300 kB stays well within those bounds.
Presentation slides are another good use case. If you are inserting images into PowerPoint or Google Slides, 300 kB images keep the overall file size manageable while looking sharp when projected. Need to go slightly smaller? Try 250 kB. For a bit more detail, the 350 kB option is a step up.
JPG is almost always the right choice for photos at 300 kB. It handles photographic content efficiently and you will get noticeably better quality compared to PNG at the same file size. Use PNG only if your image has transparency or sharp graphic elements like logos or text.
For website images, dimensions around 1200x800 pixels work well at 300 kB. This covers most standard blog header and content image sizes. If you are compressing images for email, 600x400 pixels is a common safe size that looks good in email clients without being too large for mobile viewers.
mb2kb is an online Image Compressor tool that allows you to compress image files to a specific size with ease. It’s ideal for optimizing images for web, emails, or online forms.
Yes, mb2kb is a completely free tool. There are no usage limitations it.
No, mb2kb is a web-based Image Compressor. The image is compressed right inside your web browser.
Upload the image you want to compress, choose the desired size, and click the “Compress” button. Your compressed image will be ready for download within seconds.
We currently support compressing images in JPEG, PNG and WebP formats.
We don’t upload any images to our server for processing. The entire compression happens locally inside your web browser. Your images never leave your device.
We don’t upload any images to our server. All processing happens locally and we don’t store any image data.
300 kB is a solid choice for website images. It provides good visual quality while keeping page load times reasonable. For blog headers, product photos, and content images, 300 kB strikes a nice balance. If your website has many images on one page, you might want to go a bit lower, but for pages with just a few images, 300 kB works great.
At 300 kB, you can comfortably work with images up to 1200x800 pixels while maintaining very good quality. This covers most common website image sizes, blog post headers, and product photos. Even 1600x1200 will look decent at 300 kB for photographs with gradual color transitions.
If your website visitors primarily use modern browsers, WebP will give you better quality at 300 kB compared to JPEG. WebP typically produces files that are 25 to 30% smaller than JPEG at the same visual quality. However, if you need broad compatibility including older browsers, JPEG is still the safer choice.