Reduce Image Size in KB

Quick answer: Use this free online image compressor to reduce image size in KB. Choose a target file size such as 100 KB, 200 KB, 500 KB, or 1 MB, and the tool creates a smaller JPG under your limit.

Reduce image size

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Originalsample image

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ResultJPG copy

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Need to compress an image for a website, form, email, or app? Upload it here, choose the maximum file size, and download a smaller JPG. This image compression tool works in your browser, so your image is not sent to a server.

The tool starts at 200 KB and finds a clear compressed result automatically. If the result is too soft or still too large, adjust Image quality or Image dimensions.

Processed locally in your browser
PNG, JPG, and WebP input
Original and result file sizes shown
Processed result downloads as JPG

When do you need a smaller image?

Pick the situation that matches your need. Use the suggested target, then check the actual file size below the preview.

Online forms with file-size limits
Some registration and upload forms reject an image that is larger than the allowed file size. Choose the same limit in this tool, then check the result before uploading it.
Try this first
Start with a target of 100-200 KB and let the tool fit the JPG.
Keep in mind
This usually creates a smaller JPG with moderate detail loss. If the form has a strict maximum, check the actual result size rather than relying on the starting range.
Job, school, and government applications
Application portals often require a profile photo, scanned document, or ID image to stay below a file-size limit. Use a larger target when faces, names, or document details must stay clear.
Try this first
Start with a target of 200-500 KB to protect readability.
Keep in mind
Keeping the scale higher protects readability, but the file may remain larger. Lower JPEG quality gradually before reducing the dimensions.
Email attachments and messaging apps
Large photos take longer to attach, send, and download. Make a smaller copy before sending it when the original resolution is not necessary.
Try this first
Start with a target of 100-300 KB for a lighter copy.
Keep in mind
The smaller copy is easier to share, but fine texture and sharp edges may soften. Raise the target when the image still needs to look clean.
Slow mobile connections
A smaller image uses less data and is usually faster to upload or download on a slow or unstable connection. This is useful for quick previews and casual sharing.
Try this first
Start with a target of 50-150 KB when bandwidth is limited.
Keep in mind
Lower scale reduces data use quickly, but it also reduces the exported dimensions. Keep the subject centered and recognizable when the image will be viewed on a phone.
Screenshots for support tickets
Screenshots can become large when they contain browser controls, long pages, or dense interface text. Reduce the attachment before sending a support ticket or bug report.
Try this first
Start with a target of 200-500 KB to protect text.
Keep in mind
A higher scale preserves text, while stronger compression can add artifacts around letters. Keep the target generous enough for labels to remain understandable.
Product listings and marketplace uploads
Marketplace websites may limit the size of product photos. Reduce the file while keeping the product shape, color, and important details clear.
Try this first
Start with a target of 300-800 KB to protect product detail.
Keep in mind
A cleaner product photo may need a larger file. If the result looks too soft, raise JPEG quality or choose a larger target before reducing dimensions.

Need a different kind of image tool?

This page makes a file smaller. Use one of these tools when you want to change how the image looks instead.

What changes when you reduce image size?

Start with a target size and let the tool do the work. These controls are useful only when you want to fine-tune the result.

Concept	What it means	Best for	Main controls
Target file size	The maximum size you want the downloaded image to be, such as 200 KB. The tool tries to stay under this number.	Upload forms, email attachments, and website limits	Target file size
JPEG compression	Keeps the same general dimensions but removes some detail so the JPG uses fewer bytes. Higher quality usually looks clearer but creates a larger file.	Making a file smaller without changing its displayed size too much	Image quality
Image dimensions	Makes the downloaded picture physically smaller. This can reduce file size quickly, but the image will also have fewer pixels.	When the image is still too large after compression	Image dimensions

Which target size should you choose?

Choose the smallest target that still gives you the clarity you need. The exact result depends on the image, so always check the file size shown below the preview.

Target	Starting settings	Use when	Note
Small upload	Target 200-500 KB; quality 55-82; scale 80-100%	When the image should be lighter to upload but still look clean.	Use the automatic fit first and raise the target if details soften.
Strict file limit	Target 50-200 KB; quality 30-60; scale 55-85%	When the main target is a specific file-size cap.	Check the actual result size because every image compresses differently.
Fast sharing copy	Target 25-100 KB; quality 25-55; scale 45-75%	When a smaller file matters more than full resolution.	Lower dimensions before pushing quality to the lowest setting.
Readable screenshot	Target 100-500 KB; quality 45-75; scale 80-100%	When text or interface details still need to stay understandable.	Use a larger target when letters show visible compression artifacts.

How to reduce an image to a smaller file size

Follow these steps when a website, form, or app gives you a file-size limit.

Upload a JPG, PNG, or WebP image, or use the demo image to try the online image compressor.
Enter the maximum file size you need, such as 100 KB, 200 KB, or 500 KB.
Click Fit to target. The tool creates a JPG that stays under the number you entered.
Look at the result preview. If it is too blurry, raise Image quality or choose a larger target.
If the file is still too large, lower Image dimensions.
Download the JPG or copy it directly to your clipboard.

Adjust the result when needed

The automatic result is a good starting point. Higher quality keeps more detail; smaller dimensions make the file smaller faster.

Goal	Target size	JPEG quality	Output scale	Use when
Small upload	200-500 KB	55-82	80-100%	When the image should be lighter to upload while staying clear.
Strict file limit	50-200 KB	30-60	55-85%	When an upload form rejects files above a fixed maximum.
Fast sharing copy	25-100 KB	25-55	45-75%	When a smaller file matters more than full resolution.
Readable screenshot	100-500 KB	45-75	80-100%	When interface text and labels still need to be understood.

Simple tips for a better result

Most images work well with the automatic setting. Use these tips when the result is not clear or small enough.

Keep the dimensions when possible

The tool first tries to keep the original dimensions and reduce the file through JPG compression. This helps the image stay the same size on screen.

Use a larger target for clearer images

If faces, text, or product details look soft, increase the target from 100 KB to 200 KB or 500 KB. More bytes usually means more detail.

Change one setting at a time

Raise Image quality when the result looks damaged. Lower Image dimensions when the result looks clear but the file is still too large.

Check the number below the preview

Two images with the same dimensions can have different file sizes. Always use the displayed result size when a form has a strict limit.

See what a smaller file looks like

Move the slider to compare the original image with a smaller JPG copy.

Smaller upload copy

Clean photoReduced KB result

Original 492 KBResult 6.5 KB99% saved

Readable screenshot

Sharp screenshotSmaller KB copy

Original 538 KBResult 16 KB97% saved

Rough small image

Clean avatarCompressed avatar

Original 514 KBResult 25 KB95% saved

Questions about reducing image size

These answers explain what the tool does and which setting to use.

How do I compress an image to a specific KB size?

Enter the target KB value and let the tool compress the image into a JPG under that limit. Adjust image quality or dimensions manually when the result needs a different clarity and size balance.

What is the difference between image quality and image dimensions?

Image quality controls how much detail the JPG keeps. Image dimensions control the physical width and height of the downloaded picture. Lower dimensions usually reduce the file size faster.

Can I compress an image without uploading it?

Yes. The image is processed locally in your browser. It is used to create the compressed preview and download, and is not sent to a server by this tool.

What target size should I choose?

Use the limit given by the website or form. Common targets are 100 KB for a strict upload, 200 KB for a general upload, 500 KB for a clearer photo, and 1 MB for larger images.

Will a smaller image file look worse?

Usually, because fewer bytes mean less image information. A larger target keeps more detail, while lower dimensions can make the picture physically smaller.

Can I reduce a PNG or WebP image?

Yes. Upload a PNG, JPG, or WebP. The downloaded result is a JPG, which is widely accepted by upload forms and usually smaller for photos.