Limit Image File Size

Compress an image to a target file size in KB directly in your browser.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Limit Image File Size compresses an image to a chosen weight in KB or MB directly in your browser. Useful when a website, marketplace, form, CMS, email, or account accepts files only up to a limit such as 100 KB, 300 KB, 500 KB, or 1 MB. The service iteratively adjusts JPEG/WebP quality and may reduce dimensions to stay within the limit.

What it does

Output

Processing

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IImage Compressor

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Data passed between tools is kept only in the current browser session.

How to use

Upload a PNG, JPG, or WebP image.
Set the target file size, for example 500 KB.
Choose output format and compression strategy.
Click Fit to limit.
Check the actual result weight and download the image.

More about this tool

Limit Image File Size compresses an image to a chosen weight in KB or MB directly in your browser. It is useful when a website, marketplace, form, CMS, email, or account accepts files only up to a certain limit, for example 100 KB, 300 KB, 500 KB, or 1 MB. The service iteratively adjusts JPEG/WebP quality and, if needed, reduces image dimensions to produce the best possible quality within the limit. Processing runs locally through canvas; the image is not sent to the UtiLab server.

Runs in the browser
File is not sent to the server
Compresses image to a target KB limit
Supports PNG, JPG, and WebP
Quick limits for 100/300/500 KB and 1 MB
Iterative quality adjustment
May reduce image dimensions if needed
No registration required

Frequently Asked Questions

How do I compress an image to 500 KB?

Upload an image, choose the 500 KB limit, and click Fit to limit. The tool tries to adjust quality and format so the result is not larger than 500 KB.

Is the file uploaded to the server?

No. The image is processed locally in your browser through canvas and not sent to the UtiLab server.

Why could the limit not be reached?

The limit may be too small for the source image. Allow width and height reduction, choose JPEG/WebP, or increase the target size.

Should I choose JPEG or WebP?

For photos, JPEG and WebP usually compress better than PNG. WebP often yields a smaller file if the browser supports WebP export.

Why is PNG hard to compress to a target KB?

PNG does not use lossy JPEG/WebP compression and usually has no quality parameter through the Canvas API. For photos, use JPEG or WebP.

Will image dimensions change?

If resize fallback is enabled, the tool may reduce width and height when lowering quality alone is not enough. If resize fallback is disabled, dimensions stay the same.

Is transparency preserved?

PNG and WebP can preserve transparency. JPEG does not support transparency, so transparent areas are replaced with the chosen background.

How is this different from regular image compression?

Regular compression reduces weight by chosen quality. This tool tries to hit a specific limit, for example make the file no larger than 500 KB.

Can I upload several images?

This tool works with one image at a time so result quality is easier to control. For batch compression, use a separate batch tool.

Do I need to register?

No. The tool works immediately and does not require registration.

More about this tool

Runs in the browser
File is not sent to the server
Compresses image to a target KB limit
Supports PNG, JPG, and WebP
Quick limits for 100/300/500 KB and 1 MB
Iterative quality adjustment
May reduce image dimensions if needed
No registration required

Frequently Asked Questions

How do I compress an image to 500 KB?

Upload an image, choose the 500 KB limit, and click Fit to limit. The tool tries to adjust quality and format so the result is not larger than 500 KB.

Is the file uploaded to the server?

No. The image is processed locally in your browser through canvas and not sent to the UtiLab server.

Why could the limit not be reached?

The limit may be too small for the source image. Allow width and height reduction, choose JPEG/WebP, or increase the target size.

Should I choose JPEG or WebP?

For photos, JPEG and WebP usually compress better than PNG. WebP often yields a smaller file if the browser supports WebP export.

Why is PNG hard to compress to a target KB?

PNG does not use lossy JPEG/WebP compression and usually has no quality parameter through the Canvas API. For photos, use JPEG or WebP.

Will image dimensions change?

If resize fallback is enabled, the tool may reduce width and height when lowering quality alone is not enough. If resize fallback is disabled, dimensions stay the same.

Is transparency preserved?

PNG and WebP can preserve transparency. JPEG does not support transparency, so transparent areas are replaced with the chosen background.

How is this different from regular image compression?

Regular compression reduces weight by chosen quality. This tool tries to hit a specific limit, for example make the file no larger than 500 KB.

Can I upload several images?

This tool works with one image at a time so result quality is easier to control. For batch compression, use a separate batch tool.

Do I need to register?

No. The tool works immediately and does not require registration.